• Upload an X-ray image
• I'll analyse it and identify the fracture/pathology
• I'll then fire a structured set of questions as an HOD would during a clinical teaching session or viva - covering:
  • Description & Classification (AO/OTA, specific classification systems)
  • Anatomy & Mechanism
  • Clinical Assessment
  • Management (operative vs non-operative, implant choice)
  • Complications
  • Pearls & Pitfalls from Rockwood and Campbell

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1. I'll play the role of HOD/Examiner - you or your residents answer
2. After each answer (or if you skip), I'll provide the model answer from Rockwood/Campbell
3. Questions will escalate in difficulty - from junior resident level to senior/MS level
4. I'll flag any must-know exam points and common clinical traps

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1. Analyse the image
2. Identify the fracture
3. Begin the structured viva questions

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🏥 AIIMS Gorakhpur - Fracture Clinic

HOD's Viva | Patient: Ankit Yadav, 26 years | Right Shoulder AP View | 03-Jul-2026

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📋 RADIOGRAPH FINDINGS (HOD's Reading)

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❓ QUESTION SET — START FIRING

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🔴 LEVEL 1 — Junior Resident (JR Year 1)

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🟡 LEVEL 2 — Senior Resident / MS Student

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🔴 LEVEL 3 — MS / Senior Resident (Decision Making)

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⚫ LEVEL 4 — Examiner Level / HOD Round

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💎 PEARLS FROM ROCKWOOD & CAMPBELL

• Rockwood (Ch. Clavicle fractures): Neer Type II distal clavicle fractures have a reported non-union rate of 22-33% with conservative management - significantly higher than middle-third fractures (< 1%).
• Campbell's (Vol. 3): Hook plate fixation requires mandatory removal at 3-6 months to prevent subacromial impingement and rotator cuff erosion.
• Clinical Pearl: Always order stress views (weighted AP) or a Zanca view (15° cephalad tilt) to properly assess the distal clavicle and CC interval - a standard AP understimates displacement.
• Must Know: The trapezoid ligament (lateral CC) resists anterior displacement; the conoid ligament (medial CC) resists superior displacement. In Neer Type IIA - both ligaments intact. In Type IIB - conoid torn, trapezoid intact.

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🏥 AIIMS Gorakhpur - Fracture Clinic

MODEL ANSWERS — Distal Clavicle Fracture (Neer Type II)

Source: Rockwood & Green's Fractures in Adults 10th Ed (2025) + Campbell's Operative Orthopaedics 15th Ed (2026)

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✅ Q1 — Systematic X-ray Description

• Fracture of the lateral (distal) third of the right clavicle - complete, slightly oblique pattern
• Proximal fragment displaced superiorly - classic deforming force
• Distal fragment remains with the acromion - indicating the AC joint itself is maintained
• CC interval appears widened - suggesting CC ligament disruption
• Glenohumeral joint: intact, no dislocation
• Proximal humerus: normal
• No visible rib fractures; no pneumothorax on this view

HOD Note: Always get a Zanca view (15° cephalic tilt AP, 50% penetration) for distal clavicle fractures - standard AP underestimates displacement due to rib overlap. (Rockwood & Green, p.1203)

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✅ Q2 — Incidence

• Clavicle fractures = 2.6-4% of all adult fractures (Nordqvist series of 2,035 fractures)
• Middle third = 69-82% of all clavicle fractures
• Lateral third = 21-28%
• Medial third = 2-3%

(Rockwood & Green, p.1198 - based on Edinburgh population database)

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✅ Q3 — Deforming Forces (Why the Proximal Fragment Goes UP)

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✅ Q4 — Neer Classification of Distal Clavicle Fractures

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✅ Q5 — Edinburgh (Robinson) Classification

HOD TRAP: Robinson calls distal fractures "Type 3" - but Neer calls them "Type II". This numbering conflict causes significant confusion in the literature. Robinson's scheme is preferred for research; Neer's Type II classification is preferred in day-to-day clinical practice. (Rockwood & Green, p.1199)

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✅ Q6 — Coracoclavicular Ligaments

• Conoid = TORN (medial CC ligament) - allows unrestricted superior migration of proximal fragment
• Trapezoid = INTACT (remains with distal fragment and acromion)

"The CC ligaments are very strong and provide the primary resistance to superior displacement of the lateral clavicle. Their integrity plays an important role in decision making and fixation selection." - Rockwood & Green, p.1204

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✅ Q7 — CC Distance (Coracoclavicular Interval)

• Normal CC distance = 1.1 to 1.3 cm (11-13 mm) on standard AP
• Measured from the superior cortex of the coracoid to the inferior cortex of the clavicle
• >5mm difference from contralateral side = significant CC ligament disruption
• Stress views (weighted AP): 2.5-5 kg weights suspended from the wrist - increases sensitivity for CC disruption
• In AC joint dislocations: CC distance > 1.5x normal = Grade III disruption

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✅ Q8 — Management Decision: Surgery vs Conservative

1. Neer Type II (especially IIB) with displacement
2. Young, active patient with high functional demands
3. Shortening >1.5-2 cm
4. Significant superior displacement of proximal fragment
5. Open fractures
6. Skin tenting (impending open)
7. Polytrauma / floating shoulder

• Elderly, low-demand patient
• Type I, Type III fractures
• Significant comorbidities
• Patient preference with understanding of non-union risk

Rosen's Emergency Medicine: "Surgical fixation is recommended for Type II lateral clavicle fractures because these fractures have up to a 30% incidence of nonunion."

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✅ Q9 — Non-union Rate of Neer Type II

• Conservative management: 22-33% non-union rate (Rockwood & Green)
• Compare with middle-third fractures: < 1% non-union with conservative treatment
• Why so high?
  1. CC ligament disruption = no force to hold fragments together
  2. Small distal fragment = poor cortical purchase, unstable
  3. Continuous distracting forces (SCM up, arm weight down)
  4. Relatively poor blood supply at lateral end
  5. Fracture fragments are constantly mobile with shoulder movement

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✅ Q10 — Surgical Options for Distal Clavicle Fractures

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✅ Q11 — Hook Plate: Design, Technique & Mandatory Removal

• Subacromial impingement - the hook acts as a mechanical block
• Rotator cuff erosion - hook abrades the cuff undersurface with every shoulder movement
• Acromial erosion - hook can erode through the acromion
• Stiffness - restricted shoulder abduction

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✅ Q12 — CC Ligament Reconstruction: Biological & Synthetic Augmentation

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✅ Q13 — Complications

• Non-union (22-33% conservative; 5-10% operative)
• Malunion with AC joint arthrosis (Type III)
• Post-traumatic AC arthritis

• Hook plate: subacromial impingement, rotator cuff tear (if not removed)
• K-wire migration (fatal cases of wire into great vessels reported)
• Screw pullout (Bosworth screw)
• Plate breakage

• Brachial plexus traction injury (rare, from significant displacement)
• Subclavian vessel injury (extremely rare)
• Supraclavicular nerve injury (common) - causes numbness over shoulder/chest wall

• Hardware prominence (thin skin over clavicle)
• Wound dehiscence
• Infection

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✅ Q14 — TRAP QUESTION ANSWER

1. Serum protein electrophoresis (SPEP) - M-band (myeloma)
2. Serum calcium, LDH, ESR, CRP
3. Full blood count - anaemia, Bence-Jones proteins in urine
4. Skeletal survey - "punched-out" lytic lesions
5. DEXA scan - rule out osteoporosis
6. Bone scan / PET-CT if myeloma/metastasis suspected
7. Mammography / CECT chest-abdomen to find primary
8. Biopsy of fracture site if suspicious

Remember: The clavicle is a relatively common site for myeloma and metastatic deposits. A middle-aged woman with a "trivial mechanism" clavicle fracture must NEVER be sent home without workup. - This is a classic exam trap.

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📊 SUMMARY CARD — Must Know Points

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🏥 AIIMS Gorakhpur — Fracture Clinic

Right Distal Clavicle Fracture | Ankit Yadav, 26 years

Complete Q&A Reference Sheet

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🔴 LEVEL 1 — Junior Resident

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• AP Neutral view, RIGHT shoulder, male 26 years
• Fracture of the lateral (distal) third of the right clavicle - complete, oblique pattern
• Proximal fragment displaced superiorly by SCM pull
• Distal fragment remains attached to acromion - AC joint maintained
• CC interval appears widened - suggesting CC ligament disruption
• Glenohumeral joint intact, no dislocation
• No rib fractures visible
• Always supplement with Zanca view (15° cephalic tilt) - standard AP underestimates displacement due to rib overlap

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🟡 LEVEL 2 — Senior Resident / MS Student

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• Conoid torn = no restraint on proximal fragment
• Proximal fragment unconstrained - migrates superiorly continuously
• Small distal fragment = poor surgical purchase
• Constant distraction: SCM pulling up, arm weight pulling down
• Every shoulder movement creates micro-motion at fracture site

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IMPORTANT TRAP: Robinson calls distal fractures "Type 3" but Neer calls them "Type II." This numbering mismatch causes serious confusion in literature. Neer's system is preferred clinically; Robinson's is preferred for research. (Rockwood & Green, p.1199)

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• Conoid = TORN - allows unrestricted superior migration of proximal fragment
• Trapezoid = INTACT - remains attached to distal fragment

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• Normal CC distance = 11-13 mm (1.1-1.3 cm)
• Measured from: superior cortex of coracoid to inferior cortex of clavicle on AP view
• >5 mm difference vs contralateral side = significant CC ligament disruption
• Stress radiograph: 2.5-5 kg weights hung from wrist - increases sensitivity
• For AC joint dislocations: CC distance >1.5x normal = Grade III or above
• Zanca view (15° cephalic tilt, 50% penetration) is the best view to assess CC interval for distal clavicle fractures

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🔴 LEVEL 3 — MS / Decision Making

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1. Neer Type IIB with displacement (this case)
2. Young, active, high-demand patient
3. Shortening >1.5-2 cm
4. Significant superior displacement of proximal fragment
5. Open fractures
6. Skin tenting / impending open
7. Polytrauma / floating shoulder

• Elderly, low-demand patient
• Neer Type I or Type III
• Significant surgical comorbidities
• Patient refusal with informed consent (accepting non-union risk)

Rosen's Emergency Medicine: "Surgical fixation recommended for Type II lateral clavicle fractures - up to 30% incidence of nonunion with conservative management."

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• Neer Type II conservative non-union = 22-33% (Rockwood & Green)
• Middle-third fracture conservative non-union = < 1%

1. CC ligament disruption = no passive compressive force across fracture
2. Small distal fragment = poor bony contact
3. Continuous distraction from opposing muscle forces
4. Relatively poor blood supply at lateral clavicle end
5. Constant micro-motion from every shoulder movement
6. Gravity continuously distracts via arm weight

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⚫ LEVEL 4 — Examiner / HOD Level

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• Deltotrapezial fascia is split and reflected
• A small defect is made in the posterolateral AC joint capsule
• Hook is passed into the posterior subacromial space, seating under the acromion
• Plate is pressed onto the superior clavicle surface
• Proximal screws are inserted with fracture reduced

• Subacromial impingement syndrome
• Rotator cuff erosion - hook mechanically abrades cuff undersurface with every shoulder movement
• Acromial stress fracture / erosion
• Shoulder stiffness and restricted abduction
• Implant failure / hook fracture with delayed removal

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• Non-union (22-33% conservative; 5-10% operative)
• Malunion with step deformity
• AC joint post-traumatic arthrosis (especially Type III)
• Shoulder stiffness

• Hook plate: subacromial impingement, rotator cuff tear if not removed
• K-wire migration - reported fatal cases of migration into great vessels, heart, and trachea
• Bosworth screw: pullout, breakage at screw-plate junction
• Plate breakage at fracture site

• Supraclavicular nerve injury - most common; numbness over anterior chest wall / shoulder (purely sensory, usually recovers)
• Brachial plexus traction (rare, significant displacement)
• Subclavian vessel injury (rare)

• Hardware prominence (subcutaneous bone = thin skin)
• Wound dehiscence
• Superficial / deep infection

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Never send a middle-aged woman with a trivial-mechanism clavicle fracture home without metabolic and oncological workup. This is a classic exam and clinical trap.

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📋 QUICK REFERENCE SUMMARY CARD

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🏥 AIIMS Gorakhpur — Fracture Clinic

Post-operative Review | Ankit Yadav, 26 years | Right Shoulder AP | 05-Jul-2026

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📋 HOD'S READING OF THIS FILM

• Same patient, 2 days post-surgery
• Superior plate applied on the right clavicle, lateral third / distal shaft region
• 4 screws visible - 2 medial to fracture, 2 lateral (into distal fragment)
• Plate appears to sit on the superior surface of the clavicle
• Fracture appears reduced - length and alignment restored
• AC joint maintained - CC distance looks normal
• No obvious hardware failure, no screw back-out
• Glenohumeral joint intact

HOD's clinical observation: Only 2 screws on each side of the fracture visible. The distal fragment appears short with 2 screws only. This raises important questions about adequacy of fixation.

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❓ QUESTION SET — POST-OPERATIVE VIVA

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🔴 LEVEL 1 — Junior Resident

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🟡 LEVEL 2 — Senior Resident / MS Student

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🔴 LEVEL 3 — MS / Decision Making

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⚫ LEVEL 4 — HOD / Examiner Level

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💎 PEARLS FROM ROCKWOOD & CAMPBELL

• Campbell's (15th Ed): For distal clavicle ORIF, if using a superior plate, a minimum of 3 bicortical screws on each side is recommended. The distal fragment frequently only allows 2-3 screws - this is the most common cause of construct failure.
• Rockwood & Green (10th Ed): Superior plating is biomechanically superior because the superior surface is the tension surface during arm elevation - placing the plate here neutralizes the dominant deforming force.
• Biomechanics pearl: The clavicle behaves like a strut under axial loading. In superior plating, the plate acts as a tension band converting tension into compression at the fracture site.
• Anatomic locking plates for the distal clavicle are specifically designed with multiple fixed-angle screws that can be aimed into the small distal fragment - superior to standard reconstruction plates in comminuted or very distal fractures.
• Post-op protocol: Pendulum exercises from week 1; active-assisted elevation from week 4-6; full active range from week 8-10; return to contact sport at 3-4 months after confirmed union.

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🏥 AIIMS Gorakhpur — Fracture Clinic

POST-OPERATIVE REVIEW | Ankit Yadav, 26 years

Right Clavicle ORIF — Complete Q&A Reference Sheet

Source: Rockwood & Green 10th Ed (2025) + Campbell's Operative Orthopaedics 15th Ed (2026)

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🔴 LEVEL 1 — Junior Resident

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• AP Neutral view, RIGHT shoulder, same patient, 05-Jul-2026 (2 days post-op)
• Superior plate applied on the distal shaft / lateral third of the right clavicle
• 4 screws visible - 2 medial to fracture, 2 lateral (in distal fragment)
• Plate sits on the superior surface of the clavicle
• Fracture appears well reduced - anatomical length and alignment restored
• AC joint maintained, CC distance appears normal
• No screw back-out, no hardware failure visible
• Glenohumeral joint intact, no dislocation
• Key question for review: Only 2 screws visible in the short distal fragment - adequacy of fixation must be assessed

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Campbell's (p.3570): "Superior placement of the plate requires less soft-tissue dissection and may be biomechanically advantageous, but the risk of implants becoming symptomatic is higher. Anteroinferior plate placement promotes safer screw trajectories and less implant irritation."

Rockwood & Green (p.1113): "A large meta-analysis showed a tendency toward less plate prominence and irritation after anteroinferior plating, and lower plate removal rates (5% vs. 11%, p=0.008) than superior plating."

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• Standard teaching (AO): minimum 3 bicortical screws = 6 cortices on each side of the fracture
• Each standard 3.5mm cortical screw through a plate grabs 2 cortices (bicortical)
• So minimum: 3 screws per side = 6 cortical purchases per side
• In the distal fragment of a distal clavicle fracture, the fragment is short and small - often only 2 screws are physically possible, which represents a weak link in the construct
• Locking screws provide angular stability even with fewer cortices - important in short distal fragments

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🟡 LEVEL 2 — Senior Resident / MS Student

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1. It is short - physically cannot accommodate more than 2-3 screws
2. It is cancellous bone - poor screw purchase compared to cortical diaphysis
3. It is small in volume - locking screw threads may converge and split the fragment
4. Continuous distracting forces - SCM pulls the proximal fragment up, gravity pulls the distal down
5. Fracture is close to AC joint - limited safe zone for screw placement without entering the joint

• Ideally 3 screws in the distal fragment using an anatomic distal clavicle locking plate with divergent multi-angle fixed-angle screw options
• With a standard reconstruction plate as seen here, 2 bicortical screws is often the maximum - considered acceptable only if fracture is not severely comminuted and adequate reduction is achieved
• Some anatomic plates allow raft screws or coracoclavicular suture loop augmentation to compensate

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Campbell's recommendation: For distal clavicle fractures (Neer Type II), an anatomic locking distal clavicle plate with multiple divergent fixed-angle screws in the distal fragment is preferred over a standard reconstruction plate. Supplementary CC ligament augmentation (FiberTape/TightRope) should be added in Type IIB cases.

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• No shoulder elevation >90° until 6 weeks
• No heavy lifting until union confirmed (typically 10-12 weeks)
• Return to contact sport: 3-4 months post confirmed union
• Driving: typically 4-6 weeks for automatic, longer for manual

Rockwood & Green: Functional outcome reaches plateau at approximately 1 year post-clavicle fracture surgery - this is important for counselling and research endpoint planning.

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🔴 LEVEL 3 — MS / Decision Making

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1. Only 2 screws in a small cancellous distal fragment - insufficient purchase
2. No angular stability if reconstruction plate used (non-locking screws)
3. Continuous distracting forces (SCM vs gravity) create toggle at the screw-bone interface
4. Screw backing out = loss of fixation = fracture redisplacement

1. Assess union status - fresh X-ray, possibly CT
2. If fracture NOT united + plate mechanically failed:
   • Return to theatre
   • Remove failed construct
   • Revise with anatomic distal clavicle LOCKING plate + CC suture augmentation (FiberTape/TightRope through coracoid)
   • Consider bone graft if significant gap
3. If fracture UNITED despite screw back-out:
   • Observe; plan elective hardware removal if symptomatic
4. Document: re-consent patient; explain need for revision surgery

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• Minimally displaced floating shoulder: conservative management acceptable (Campbell's)
• Significantly displaced: surgical fixation indicated - typically ORIF clavicle first (restores SSSC integrity and often indirectly reduces the scapular neck fracture)
• Scapular neck fixation criteria (Campbell's, Cole criteria):
  • Lateral border offset >15-20 mm
  • Scapular body angulation >40°
  • Glenopolar angle <20° or >60°
  • Translation >100%

Campbell's: "Fixation of the clavicle and/or scapula should be considered in those with greater displacements."

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• FDA definition (most widely used): Fracture that has not healed by 9 months from injury AND shows no radiographic progression of healing for 3 consecutive months
• Practical/clinical definition: Failure of fracture healing by the expected time for that bone
• For clavicle: non-union is suspected if no union by 4-6 months; confirmed if no progression by 3 months at the expected healing time

• Persistent visible fracture line
• Sclerotic fracture ends (hypertrophic) or rounded, osteopenic ends (atrophic)
• No bridging callus
• Possible hardware failure (plate bending, screw loosening)

1. CT scan - assess fracture gap, bone quality, hardware status
2. Check risk factors - smoking, nutrition, NSAID use, infection markers (WBC, ESR, CRP, serum protein)
3. If plate intact + atrophic/oligotrophic non-union:
   • Revise to stronger construct (anatomic locking plate)
   • Autologous iliac crest bone graft + platelet-rich plasma (PRP) as biological augmentation
4. Rule out infection (aspirate, biopsy if needed) before revision

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⚫ LEVEL 4 — HOD / Examiner Level

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• The distal fragment is inherently too small for standard fixation
• Solution: Anatomic locking plates with multiple fixed-angle options, supplemented by CC ligament reconstruction to neutralise the deforming force

Rockwood & Green: "Cortical alignment greatly influences fixation stability, and the absence thereof in comminuted or wedged fractures diminishes stability regardless of plate position." (p.1110)

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1. Wound swab + deep cultures (before antibiotics if possible)
2. Aggressive wound debridement in theatre - washout, debride necrotic tissue
3. Retain plate - do NOT remove (fracture will collapse)
4. Target organism-specific antibiotics (6-12 weeks, usually IV then oral)
5. Vacuum-assisted closure (VAC) if wound cannot be primarily closed
6. Cover with soft tissue - may need local or regional flap
7. Re-assess at 6-12 weeks: if fracture united, remove hardware and definitive wound closure

Golden rule: "A stable implant holding an ununited fracture should NEVER be removed - it is doing the work the bone cannot yet do."

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• During superior plating, screws are inserted superior to inferior direction
• Inadvertent drill plunge can penetrate the posterior clavicle cortex and enter the pleural cavity
• The lung apex is directly inferior and posterior to the middle third of the clavicle
• Air enters pleural space → lung collapse → respiratory distress

• CXR (erect, expiratory) - visible pleural line, absent lung markings
• CT chest if doubt - also shows haemothorax if present
• Pulse oximetry + ABG for severity assessment

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📋 CAMPBELL'S "READY RECKONER" — Risk of Non-union Table

HOD Point to Residents: Always ask about smoking status when counselling patients. A 40mm displaced, comminuted clavicle fracture in a smoker carries a 92% non-union risk conservatively - this is virtually a mandatory surgical case.

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📋 QUICK SUMMARY CARD — Post-op Clavicle Plate

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What's Inside (12 Sections, ~42 KB)

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🏥 AIIMS Gorakhpur — Fracture Clinic

Mrs Munni Singh, 45 years | Left Ankle AP + Lateral | New Case

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📋 HOD'S READING OF THIS FILM

• AP and Lateral views of the LEFT ankle
• Medial malleolus fracture — displaced avulsion-type fragment, triangular, displaced laterally and inferiorly into the medial joint space
• Lateral malleolus: intact on this film (no visible fracture)
• Posterior malleolus: no fracture visible on lateral
• Medial clear space: WIDENED — highly significant finding suggesting deltoid ligament complex disruption or mortise instability
• Tibiofibular syndesmosis: appears grossly intact on this view
• Talar dome and calcaneus: appear normal
• Significant soft tissue swelling medially

HOD Immediate Alert: In a 45-year-old woman with a medial malleolus fracture + widened medial clear space — the critical question is: Is the lateral side intact? Or is there an occult fibula fracture higher up (Maisonneuve)? This changes everything.

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❓ QUESTION SET — ANKLE FRACTURES

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🔴 LEVEL 1 — Junior Resident

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🟡 LEVEL 2 — Senior Resident / MS Student

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🔴 LEVEL 3 — MS / Decision Making

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⚫ LEVEL 4 — HOD / Examiner Level

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💎 PEARLS FROM ROCKWOOD & CAMPBELL

• Rockwood & Green: Normal medial clear space = ≤4 mm; tibiofibular clear space = <6 mm; tibiofibular overlap = >1 mm on standard AP. Any widening = instability until proven otherwise.
• Lauge-Hansen: The first word is the foot position at time of injury; the second word is the direction of deforming force. Most common pattern: Supination-External Rotation (SER) = 40–75% of all ankle fractures.
• Danis-Weber: Type A = below syndesmosis; Type B = at syndesmosis level (most common; syndesmosis may or may not be disrupted); Type C = above syndesmosis (syndesmosis ALWAYS disrupted).
• Maisonneuve: Medial clear space widening + intact distal fibula on ankle films = Maisonneuve until proven otherwise. Get full-length tibia-fibula X-ray IMMEDIATELY.
• Campbell's: A medial malleolus fracture that is displaced >2 mm, involves the weight-bearing articular surface, or is associated with ankle instability = indication for ORIF.

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🏥 AIIMS Gorakhpur — Fracture Clinic

MODEL ANSWERS — Left Ankle Fracture (Medial Malleolus)

Mrs Munni Singh, 45 years | Source: Rockwood & Green 10th Ed (2025) + Campbell's 15th Ed (2026)

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✅ Q1 — Systematic X-ray Description + 3 Key Measurements

• Displaced fracture of the medial malleolus - triangular avulsion fragment, displaced laterally and inferiorly
• Medial clear space: WIDENED (>4 mm) - critical finding indicating mortise disruption
• Lateral malleolus: appears intact on this film
• Posterior malleolus: no visible fracture on lateral view
• Talus and calcaneus: appear normal
• Significant medial soft tissue swelling

Rockwood & Green (p.3304): These three measurements should be systematically assessed on every ankle trauma series. The "ball sign" confirms fibular length - an unbroken curve connecting the distal tip of fibula and lateral process of talus.

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✅ Q2 — Medial Clear Space: Normal Value, Significance, Stability

• Normal medial clear space = ≤4 mm
• Measured between: lateral surface of medial malleolus and medial border of talar body on AP or mortise view

• Disruption of the deep deltoid ligament (primary medial stabiliser of ankle)
• OR displaced medial malleolus fracture creating a bony gap
• Either way = medial mortise instability = talus can shift laterally

• Even 1 mm of lateral talar shift reduces tibiotalar contact area by 42% (Ramsey & Hamilton, 1976)
• This dramatically increases contact stress → rapid post-traumatic arthrosis

Stability principle (Rockwood & Green, p.3523): "A satisfactory outcome after ankle fracture can be anticipated when the joint is congruent (the talus is placed anatomically under the plafond) and stable (it remains there until fracture healing)."

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✅ Q3 — Mechanism Producing Medial Malleolus Fracture

• Foot supinated at time of injury (most common resting position)
• External rotation force applied (direction of fall)
• = Supination-External Rotation (SER) - the most common ankle fracture pattern (60% of all ankle fractures)

• As the talus externally rotates within the mortise, it stretches and ruptures the anterior inferior tibiofibular ligament (ATFL) and posterior ITFL first
• The deep deltoid ligament on the medial side then either:
  • Ruptures (more common = bimalleolar equivalent), OR
  • Avulses a fragment from the medial malleolus tip (= avulsion fracture as seen here)
• The avulsion fragment is pulled inferiorly and laterally by the deltoid ligament

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✅ Q4 — Lauge-Hansen Classification

"The first word describes the position of the foot at the time of fracture (supination or pronation); the second is the deforming force (abduction, adduction, external rotation). The most common pattern is SER (60%)."

• Likely SER Stage IV (medial malleolus avulsion after complete lateral-side injury), OR
• If fibula intact: could be SAD Stage II (vertical medial malleolus)
• Must exclude Maisonneuve (PER Stage IV) - get full tibia-fibula X-ray

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✅ Q5 — Danis-Weber (AO) Classification

Critical rule: Weber C = syndesmosis ALWAYS disrupted = syndesmotic fixation always required.

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✅ Q6 — Maisonneuve Fracture: Why You MUST X-ray the Full Fibula

1. Foot pronated, external rotation force applied
2. Medial side fails first - deltoid tears OR medial malleolus avulses
3. Force travels proximally up the interosseous membrane (complete tear)
4. Anterior and posterior tibiofibular ligaments (syndesmosis) tear completely
5. Energy exits at the proximal fibula - spiral # at fibular neck/head

• Ankle X-rays may look deceptively normal (just widened medial clear space)
• The injury is highly unstable - complete syndesmotic disruption + medial disruption
• The fibula "floats freely" between the ankle and knee (Rosen's Emergency Medicine)
• Treatment: syndesmotic fixation is MANDATORY (syndesmotic screw or tightrope)

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✅ Q7 — The Ankle Mortise Ring + Stability Assessment

1. Lateral pillar - Distal fibula + lateral malleolus + lateral ligament complex (ATFL, CFL, PTFL)
2. Medial pillar - Medial malleolus + deep and superficial deltoid ligament
3. Roof - Tibial plafond + syndesmotic complex (AITFL, PITFL, interosseous ligament, interosseous membrane)

• Like a bony ring (pelvis), a single break = stable
• Two or more breaks = UNSTABLE

• Medial pillar: broken (medial malleolus fracture)
• Lateral pillar: appears intact on this film but must exclude lateral injury
• If only one break → potentially stable
• Widened medial clear space suggests at least two-break injury → UNSTABLE

• Is the talus centered under the plafond?
• Is the medial clear space normal on stress view?
• Is there a lateral-side injury (fibula #, lateral ligament tear)?
• Is the syndesmosis intact?

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✅ Q8 — Surgery Indications for Displaced Medial Malleolus Fracture

• Undisplaced medial malleolus fracture (<2 mm)
• Mortise congruent and stable
• Elderly, low-demand patient with multiple comorbidities (relative)

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✅ Q9 — Surgical Approach, Implants, and Fixation Technique

• Anteromedial incision over the medial malleolus
• Protect the saphenous vein and nerve anteriorly
• Sweep out any periosteum or soft tissue interposition from the fracture site (critical - entrapped periosteum prevents anatomic reduction)
• Confirm anatomic reduction visually and radiographically

Miller's Review (p.6985): "Medial buttress plate/screws parallel to joint — vertical fracture patterns (supination-adduction). Compression screws perpendicular to fracture — transverse/oblique patterns."

1. Reduce fracture with pointed reduction forceps
2. Confirm on fluoroscopy
3. Insert 2 guide wires parallel, perpendicular to fracture line
4. Overdrill proximal cortex (lag technique) or use partially threaded cancellous screws
5. Insert screws to achieve compression
6. Check on AP, mortise, and lateral views

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✅ Q10 — Supination-Adduction (SAD) Injury: Vertical Medial Malleolus

• Foot supinated; adduction force (talus pushed medially)
• Stage I: Lateral side fails first - transverse fibula fracture BELOW the syndesmosis (or lateral ligament rupture)
• Stage II: Continued adduction drives talus into medial malleolus → vertical (impaction) fracture of medial malleolus

1. The fracture line is VERTICAL (not horizontal as in SER)
2. If you fix with horizontal screws perpendicular to the fracture → screws are parallel to the fracture line → NO compression, the fracture will collapse
3. Must use a medial buttress (antiglide) plate or screws directed parallel to the joint surface to resist the vertical shear force
4. Missing this pattern = construct failure, malunion, post-traumatic arthrosis

Miller's Review (p.6006): Shows classic vertical medial malleolus fracture image: "Use of an antiglide plate is recommended for this pattern."

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✅ Q11 — Bimalleolar Equivalent Fracture

• The deltoid ligament is as important as the medial malleolus in providing medial stability
• A torn deltoid = medial instability = widened medial clear space
• The mortise is just as unstable as a true bimalleolar fracture
• But on X-ray: the medial malleolus appears intact - easy to miss!

Critical point: Fix the fibula first, then reassess mortise on fluoroscopy. If medial clear space remains widened → open medial side to sweep interposed periosteum (which prevents reduction), but the deltoid itself does not need suturing.

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✅ Q12 — Osteoporosis (T-score –2.8): Impact on Fixation

• Poor bone quality = screw pullout risk (cancellous screws in osteoporotic medial malleolus)
• Fibula plate may cut through thin cortices
• Higher risk of non-union and malunion

• Extended non-weight-bearing period
• More frequent X-ray surveillance for early displacement
• Lower threshold for supplementary fixation

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✅ Q13 — CRPS after Ankle ORIF: Diagnosis and Management

• Clinical diagnosis primarily
• Bone scan: diffuse periarticular uptake (3-phase technetium bone scan)
• X-ray: periarticular osteopenia (Sudeck's atrophy)

1. Physiotherapy - desensitisation, graded motor imagery, mirror therapy
2. Analgesics - NSAIDs, gabapentin/pregabalin (neuropathic pain)
3. Regional sympathetic blockade - stellate ganglion block, lumbar sympathectomy
4. Bisphosphonates - reduce bone turnover (IV pamidronate)
5. Vitamin C prophylaxis - 500 mg/day for 50 days post-op (reduces CRPS incidence by 85% in some studies)
6. Spinal cord stimulation - for refractory cases

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✅ Q14 — TRAP: Diabetic Patient with Peripheral Neuropathy

• HbA1c <7.5% ideally before elective surgery (higher = 2-3x wound complication risk)
• Peripheral vascular assessment (ABI - Ankle-Brachial Index; Doppler studies)
• Neuropathy assessment - monofilament test, VPT (vibration perception threshold)
• Rule out Charcot neuroarthropathy (may mimic ankle fracture)
• Optimise with endocrinology; tight perioperative glucose control

• Longer constructs with more screws - distal neuropathic bone is fragile
• Consider locking plates throughout
• Intraoperative: meticulous tissue handling (immunocompromised = infection risk)
• Lower threshold for primary arthrodesis in severe Charcot or poor bone quality

• Extended non-weight-bearing - minimum 12 weeks (vs 6 weeks in normal patients)
• More frequent wound checks (impaired healing, infection risk)
• Serial X-rays at 2-4 week intervals - higher displacement risk
• No removable boot in neuropathic patients (cannot feel instability)

HOD Rule: A diabetic patient with peripheral neuropathy and ankle fracture should be discussed with your consultant before surgery. Consider whether primary arthrodesis is more appropriate than fracture fixation in a Charcot-risk patient.

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📋 QUICK REFERENCE SUMMARY CARD — Ankle Fractures

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🏥 AIIMS Gorakhpur — Fracture Clinic

Munni Devi, 49 years | Left Ankle Post-ORIF Lateral Views | 06-Jul-2026

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📋 HOD'S READING OF THIS FILM

• Two parallel partially-threaded cancellous screws in the medial malleolus (clearly seen as two separate screws on left image; superimposed to one on right lateral)
• Screws directed superiorly into the distal tibial metaphysis - correct trajectory
• Appropriate screw length - not over-penetrating posterior cortex
• Posterior plaster slab in situ

• Distal tibial alignment appears maintained
• Ankle joint appears reduced on lateral view - tibiotalar relationship looks congruent
• No obvious hardware failure, no screw penetration into joint
• Early post-op - no callus expected yet
• Medial malleolus fragment appears reduced back to its bed

HOD Observation: These are LATERAL views only - you cannot assess the mortise (medial clear space) on lateral views. Always demand AP + Mortise + Lateral as the post-op standard series. Assessing reduction quality on lateral alone is incomplete.

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❓ QUESTION SET — POST-OPERATIVE ANKLE ORIF VIVA

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🔴 LEVEL 1 — Junior Resident

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🟡 LEVEL 2 — Senior Resident / MS Student

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🔴 LEVEL 3 — MS / Decision Making

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⚫ LEVEL 4 — HOD / Examiner Level

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💎 PEARLS FROM ROCKWOOD & CAMPBELL

• Rockwood & Green: Fix fibula first in bimalleolar fractures - restores fibular length and rotation; then check medial clear space. If it normalises, the deep deltoid has not been surgically repaired. If still wide, open medially to sweep interposed tissue.
• Campbell's: For medial malleolus non-union - standard screws fail; revision requires bone grafting AND internal fixation. Percutaneous approaches do NOT allow debridement of scar tissue at the non-union site - an OPEN approach is MANDATORY.
• Post-op standard: Weight-bearing in a cast at 6 weeks if union progressing; non-weight-bearing for 6 weeks is standard for bimalleolar/trimalleolar fixation.
• Ankle arthrodesis remains gold standard for end-stage ankle arthrosis in young active patients - 85-90% long-term satisfaction. TAR is emerging but has higher revision rate.
• Screw removal: Medial malleolus screws - minimum 1 year post-injury, confirmed union on X-ray; remember the saphenous nerve runs anterior to the medial malleolus - at risk during removal.

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🏥 AIIMS Gorakhpur — Fracture Clinic

MODEL ANSWERS — Post-ORIF Left Ankle

Munni Devi, 49 years | Source: Rockwood & Green 10th Ed (2025) + Campbell's 15th Ed (2026) + Gray's Anatomy

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✅ Q1 — What's Wrong with This Imaging + Standard Post-op Series

• Screw length and direction (✅ done here)
• Tibiotalar joint congruence in sagittal plane
• Posterior malleolus (no fracture)
• Position of posterior slab

• Medial clear space
• Tibiofibular syndesmosis
• Tibiotalar coronal plane alignment
• Whether the mortise is reduced

HOD Rule: Never discharge or review a post-ankle-ORIF patient on lateral films alone. Always demand AP + Mortise + Lateral as the minimum.

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✅ Q2 — Screw Orientation, Depth, and Number for Medial Malleolus Fixation

Miller's Review: Two parallel screws are the standard - one screw allows rotational instability of the fragment.

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✅ Q3 — Immediate Post-operative Instructions

• Limb elevated above heart level continuously for 48-72 hours - reduces swelling and risk of wound complications

• Posterior slab in neutral position (90°) - not equinus, not excessive dorsiflexion
• Convert to below-knee backslab cast at 2 weeks once swelling settles and sutures reviewed

• Non-weight-bearing on crutches - minimum 6 weeks for isolated medial malleolus ORIF with confirmed good fixation
• Toe-touch weight-bearing may be allowed earlier in very stable constructs (surgeon's discretion)

• Sutures/staples at 2 weeks
• Watch for wound complications: discharge, blistering, erythema (especially in diabetics)

• Gentle ankle pumps from day 1 (within the slab) - reduce DVT risk, maintain calf pump
• Formal physiotherapy starts at 6 weeks

• Analgesia (paracetamol, NSAIDs if no contraindication)
• DVT prophylaxis: LMWH or aspirin (as per local protocol; high-risk patient = 45-year-old female)
• Consider Vitamin C 500mg/day × 50 days (CRPS prophylaxis)

• Severe increasing pain (compartment syndrome)
• Numbness/tingling worsening
• Cast becomes too tight or too loose
• Fever / wound discharge

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✅ Q4 — Weight-bearing Protocol + Cast Conversion + Physiotherapy

"A satisfactory outcome after ankle fracture can be anticipated when the joint is congruent and stable (it remains there until fracture healing)."

• Stable, simple isolated fracture with excellent fixation
• Young, compliant patient
• Some evidence for early weight-bearing in a boot after stable ankle ORIF - reduces stiffness, no higher complication rate (emerging practice)

• Phase 1 (0-6 weeks): Ankle pumps, knee/hip strengthening, calf pump exercises within the cast
• Phase 2 (6-10 weeks): Active ROM; proprioception; walking re-education
• Phase 3 (3-4 months): Strengthening, balance, return to function

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✅ Q5 — Structures Posterior to the Medial Malleolus (Tarsal Tunnel)

• Tibialis posterior tendon - can be interposed in fracture, must be swept out before reduction
• Saphenous nerve and vein - run anterior to the medial malleolus (NOT in the tunnel) - at risk during anteromedial approach and screw insertion
• Posterior tibial nerve and artery - if incision extends too far posterior

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✅ Q6 — Should the Deltoid Ligament Be Repaired?

1. Fix the fibula first (in bimalleolar fractures) - restoring fibular length and rotation is the critical step
2. After fibular fixation, check the mortise on fluoroscopy under image intensifier
3. If medial clear space normalises (≤4 mm) → the deltoid does not need repair; it will heal with immobilisation
4. If medial clear space remains wide after fibular fixation → open the medial side, but only to:
   • Sweep out interposed tibialis posterior tendon or periosteum (this is the usual cause of persistent widening, NOT the ligament itself)
   • The deltoid ligament itself is NOT formally sutured in most protocols

• Persistent medial instability after fibular fixation with no interposed tissue
• Chronic deltoid incompetence causing recurrent instability
• Some surgeons advocate repair in high-demand athletes (not universally accepted)

Campbell's (p.5953): "ORIF of the fibula, with or without repair of the deltoid ligament, can be performed." - Note: deltoid repair is described as optional, not mandatory.

Rockwood & Green: The priority is fibular length restoration; medial soft tissue repair is secondary and often unnecessary.

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✅ Q7 — Medial Clear Space Still Wide at 4 Weeks Post-op

1. First: Repeat true mortise view (15-20° internal rotation) in controlled conditions - rule out positioning artefact
2. CT scan - assess fracture reduction, screw position, and syndesmosis
3. Fluoroscopic stress test under anaesthesia - external rotation stress to assess syndesmosis
4. If interposed tissue confirmed: early return to OT (within 2-3 weeks) for open medial debridement and re-fixation
5. If syndesmosis torn: syndesmotic screw or tightrope fixation

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✅ Q8 — Medial Malleolus Non-union: Definition, CT Role, Management

• Fracture with no radiographic progression for 3 consecutive months AND failed to unite by expected time
• For medial malleolus: non-union suspected by 3-4 months; confirmed by 6 months

• Plain X-ray underestimates gap and non-union type
• CT confirms: fracture gap size, screw position, bone quality, presence of fibrocartilaginous tissue at non-union site
• Helps plan: is bone graft needed? What type of fixation?

"Medial malleolar non-unions typically require bone grafting and internal fixation. Percutaneous approaches do NOT allow debridement of the scar tissue at the non-union site."

1. Open approach MANDATORY - cannot debride fibrocartilaginous/scar tissue percutaneously
2. Remove existing hardware
3. Thoroughly debride the non-union site - remove fibrocartilage, fibrous tissue, sclerotic bone ends; freshen both surfaces to bleeding bone
4. Bone graft (iliac crest autograft) to fill the gap and provide biological stimulus
5. Stable internal fixation - 2 cannulated screws or plate + screws depending on bone quality
6. Supplementary fixation (tension band wire) if bone is osteoporotic
7. Post-op: standard non-weight-bearing protocol

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✅ Q9 — Screw Removal: Protocol and Risks

• Not mandatory unless symptomatic
• Prominent screw heads causing pain over thin medial skin = symptomatic hardware = valid indication for removal

HOD Point: Always warn the patient that screw removal may NOT completely resolve their symptoms, especially if there is early arthrosis.

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✅ Q10 — Post-traumatic Ankle Arthrosis: Management Ladder

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✅ Q11 — Intra-articular Screw: Risk, Intraoperative Check, Best View

• Screws aimed towards the tibial plafond can inadvertently enter the ankle joint
• Causes: direct articular cartilage damage, mechanical impingement, loss of dorsiflexion, rapid arthrosis
• More likely with: small fragments, poor fluoroscopic imaging, inadequate screw length assessment

1. Fluoroscopic mortise view - rotate the limb 15-20° internally; looks along the medial guttar - best view to see screw tip in relation to joint line
2. AP view - confirms screw direction and length
3. Lateral view - confirms depth, no posterior over-penetration
4. Direct visualisation - look into the joint through the fracture before reducing; after reduction, confirm no threads are visible in the articular space
5. Range of motion test on table - after screw insertion, put the ankle through full dorsiflexion/plantarflexion; any crepitus = possible intra-articular hardware

Best fluoroscopic view to detect intra-articular screw = MORTISE VIEW (15-20° internal rotation AP)

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✅ Q12 — Position of Immobilisation and Risk of Equinus

• The Achilles tendon (strongest tendon in the body) will adapt to the immobilised length
• Even 2-4 weeks in equinus can produce a fixed equinus deformity
• Requires prolonged physiotherapy or even surgical lengthening (Z-plasty of Achilles / gastrocnemius recession) to correct
• Leads to gait disturbance, forefoot overload, transfer metatarsalgia

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✅ Q13 — Anteromedial Approach: Layers + Medial Retinaculum + Tendon at Risk

1. Skin - curved or straight anteromedial incision centred on medial malleolus; 5-8 cm
2. Subcutaneous tissue - identify and protect saphenous vein and nerve (runs anteriorly)
3. Deep fascia / extensor retinaculum - incised longitudinally
4. Medial retinaculum (= flexor retinaculum, part of the lacinate ligament system) - the band of fascia that holds the posteromedial tendons in the groove behind the medial malleolus
5. Periosteum - stripped from fracture surfaces; often folded into fracture (must be swept out)
6. Fracture surface - débride, reduce, fix

• Part of the flexor retinaculum (lacinate ligament)
• Forms the roof of the tarsal tunnel
• Attaches from medial malleolus to calcaneus
• Holds tibialis posterior, FDL, posterior tibial vessels, tibial nerve, FHL in their grooves

• Tibialis posterior tendon - the most anterior structure in the groove; closest to the fracture site; most commonly interposed in the fracture; most at risk of being nicked or damaged during approach and clearance of the fracture bed

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✅ Q14 — HOD FINAL: Ankle Arthrodesis vs Total Ankle Replacement

Ankle Arthrodesis (Fusion)

Total Ankle Replacement (TAR)

My Recommendation for This Patient (59-year-old active woman):

Ankle Arthrodesis is the more appropriate choice for this specific patient at 59 years old with post-traumatic arthrosis after a medial malleolus fracture:

• Post-traumatic arthrosis often involves bone loss and irregular anatomy - harder to resurface with TAR
• TAR has higher failure rate in post-traumatic arthrosis vs primary osteoarthrosis
• At 59, she still has potentially 20-25 years of functional demand - TAR revision at that age is complex
• Arthrodesis is predictable, durable, and well-tolerated
• If she were >65, lower demand, with symmetric bone stock and primary arthrosis → TAR would be more justified

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📋 QUICK SUMMARY CARD — Post-ORIF Ankle Review

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🏥 AIIMS Gorakhpur — Fracture Clinic

Right Lower Limb | Ilizarov Circular External Fixator | Active Bone Transport / Distraction Osteogenesis

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📋 HOD'S READING OF THIS FILM

• 4-ring Ilizarov circular external fixator applied to the right tibia
• Ring 1 (proximal) - at proximal tibial metaphysis, just below knee joint
• Rings 2 and 3 (middle) - at proximal-to-mid and mid-to-distal third of tibia
• Ring 4 (distal) - at distal tibial metaphysis above ankle
• Multiple crossed transfixion K-wires at proximal and distal rings; combination of half-pins and wires at middle rings
• Threaded connecting rods between rings

• Large central regenerate bone zone in the middle third of the tibia - "cloud-like" mineralising neo-osteogenesis = active distraction osteogenesis
• A proximal corticotomy (osteotomy site) visible
• Fibula has a corresponding osteotomy at mid-shaft level
• Residual limb length discrepancy (LLD) - right leg shorter than left
• Mild varus deformity of the right tibia visible

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❓ QUESTION SET — ILIZAROV / BONE TRANSPORT VIVA

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🔴 LEVEL 1 — Junior Resident

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🟡 LEVEL 2 — Senior Resident / MS Student

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🔴 LEVEL 3 — MS / Decision Making

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⚫ LEVEL 4 — HOD / Examiner Level

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💎 PEARLS FROM ROCKWOOD & CAMPBELL

• Ilizarov's law: "Gradual traction on living tissues creates a state of metabolic activation that stimulates the growth and regeneration of new tissue" — applies to ALL tissues, not just bone.
• Distraction rate: 1 mm/day in 4 increments of 0.25 mm each. Too fast = fibrous tissue in regenerate. Too slow = premature consolidation.
• Latency period: 5-7 days (adults); 3-5 days (children); 0-2 days (elderly/poor vascularity cases - some surgeons start immediately).
• Consolidation: 1 month per cm of lengthening as a rule of thumb; wait for full corticalisation on 3 of 4 cortices before frame removal.
• Docking site: Most frequent site of failure in bone transport; often requires additional surgery (bone grafting, plating) to achieve union.
• Campbell's: Pin-site infection Grade III-IV = pin/wire removal mandatory.

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🏥 AIIMS Gorakhpur — Fracture Clinic

MODEL ANSWERS — Ilizarov Circular External Fixator / Bone Transport

Source: Rockwood & Green 10th Ed (2025) + Campbell's Operative Orthopaedics 15th Ed (2026)

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✅ Q1 — Systematic Description + Inventor + Biological Principle

• Long-leg alignment scanogram (AP view, two contrast settings) of the RIGHT lower limb
• 4-ring Ilizarov circular external fixator on the right tibia
• Crossed transfixion K-wires at proximal and distal rings; half-pins and wires at middle rings
• Large cloud-like regenerate bone in the middle third of the tibia = active distraction osteogenesis
• Proximal corticotomy site visible; fibula osteotomy visible
• Residual LLD - right leg shorter than left
• Mild varus deformity right tibia
• Diagnosis: Tibial segmental bone defect under active Ilizarov bone transport

• Prof. Gavriil Abramovich Ilizarov (1921-1992)
• Soviet orthopaedic surgeon from Kurgan, Siberia
• Developed the technique in the 1950s-1960s; published extensively from 1969 onwards
• Introduced to the West in 1981 after treating Italian poet-athlete Carlo Mauri

• The Law of Tension-Stress (Codivilla-Ilizarov Principle):
• "Gradual traction on living tissues creates a state of metabolic activation that stimulates the growth and regeneration of new tissue"
• Applies not only to bone but to ALL living tissues: blood vessels, nerves, muscles, skin, and fascia

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✅ Q2 — Distraction Osteogenesis: Biology + Histological Zones

"Distraction produces a tension-stress effect that causes neovascularity and cellular proliferation in many tissues, including bone regeneration primarily through intramembranous bone formation."

• Bone forms primarily by intramembranous ossification (NOT endochondral) - no cartilage intermediate
• The periosteum is the primary source of osteoprogenitor cells
• Corticotomy/distraction creates a nearly 10-fold increase in blood flow at the distraction site (Aronson et al.) - profound biological activation
• Bone is deposited in a columnar pattern along the axis of distraction, parallel to the traction forces

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✅ Q3 — Corticotomy: Definition, Why Preferred, Technical Requirements

1. Low-energy technique - multiple drill holes connected by osteotome, OR Gigli saw; NOT oscillating saw (heat necrosis)
2. Constant irrigation during drilling to prevent thermal damage
3. Intermittent drilling - not continuous (prevents overheating)
4. Metaphyseal or metaphyseal-diaphyseal location preferred - superior regenerate formation vs pure diaphysis
5. Periosteum preserved - not stripped
6. Complete cortex divided - if cortex not fully divided, tethering causes asymmetric distraction
7. Fibula must also be osteotomised when tibial transport is performed - prevents tethering

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✅ Q4 — Latency, Distraction Rate, Consolidation Period

• Tissue stress exceeds regenerative capacity
• Fibrous (non-bone) tissue forms in the regenerate gap
• Poor mineralisation - "insufficient consolidation" or fibrous non-union
• Neurovas cular traction injuries (nerve palsy, vascular insufficiency)

• Bone mineralises and consolidates BEFORE target length is reached
• Premature consolidation - frame locked by bone, cannot continue distraction
• Requires osteoclasis (refracture) or repeat corticotomy

Rockwood & Green: "Since the formation of the bony regenerate is slower in some patients, the treating physician should monitor the progression of the regenerate on plain radiographs and adjust the rate and rhythm of distraction accordingly."

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✅ Q5 — Bone Transport: Concept + Docking Site Problems + Management

• A "transport segment" (intercalary bone segment) is isolated between two corticotomy/osteotomy cuts
• The transport segment is slowly moved (transported) across the defect at 1 mm/day
• As it moves, it generates regenerate bone in its wake on one side
• When it reaches the other end of the defect = docking of the transport segment onto the recipient bone end = the docking site

• ~30-50% of bone transport cases require supplementary procedure at docking site (bone graft, plating, compression) to achieve final union

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✅ Q6 — Ilizarov vs Masquelet vs Free Fibula vs IMN + Bone Graft

• Defect >6 cm
• Active or recent osteomyelitis / contaminated field
• Simultaneously correcting deformity and LLD
• Soft tissue inadequate for free flap

• Defect 3-8 cm, infection controlled
• Patient cannot tolerate long Ilizarov treatment
• Combined with plate/nail for stability

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✅ Q7 — Correcting Angular Deformity with Ilizarov + The Hinge

• In Ilizarov frames, hinges are placed at the centre of rotation of angulation (CORA) on one side of the frame
• Connecting rods on the opposite side are gradually lengthened or shortened
• This creates a controlled rotation about the hinge axis = angular correction

• A mechanical joint placed between two rings that allows rotation in one plane while resisting movement in others
• Positioned at the apex of the deformity (CORA)
• Can be single-axis (corrects in one plane) or multi-axis (complex deformities)
• CORA = Centre of Rotation of Angulation - defined by the intersection of the anatomic or mechanical axis lines of the two bone segments; this is where the hinge MUST be placed

• Translation deformity is created as angular correction proceeds
• Results in a NEW deformity (translational) while the angular one is corrected

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✅ Q8 — Masquelet Technique: Description + Comparison with Ilizarov

1. Thorough debridement of infected/non-viable bone and tissue
2. Stabilise the bone with external fixator (or nail/plate)
3. Fill the defect with a PMMA cement spacer (can be antibiotic-laden: gentamicin or vancomycin)
4. Close soft tissues over the spacer
5. Wait 6 weeks - during this time a well-vascularised biological membrane (the "induced membrane") forms around the PMMA

1. Carefully open the membrane longitudinally; DO NOT excise the membrane (it is essential)
2. Remove the cement spacer
3. Pack the cavity with autologous bone graft (iliac crest + RIA - Reamer-Irrigator-Aspirator harvest for large volumes)
4. Close the membrane over the graft with sutures
5. The membrane provides:
   • Mechanical containment of the graft
   • Growth factor secretion (BMP-2, VEGF, TGF-β) - biological activation
   • Vascular supply to the graft

Campbell's: "The induced membrane technique has been successfully used to manage significant segmental bony defects... excellent results in treating chronic osteomyelitis with substantial bone loss using an antibiotic-laden PMMA spacer."

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✅ Q9 — Complications of Ilizarov Bone Transport (8+)

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✅ Q10 — Pin-Site Infection: Classification + Management

• Most common: Staphylococcus aureus (including MRSA in hospital-acquired)
• Gram-negative: Pseudomonas (especially in moist environments)
• Culture and sensitivity essential - do not just guess

• Grade I-II: Oral co-amoxiclav (Augmentin) or cephalexin for 5-7 days; review
• Grade III-IV: IV antibiotics (vancomycin/linezolid if MRSA risk; piperacillin-tazobactam if Pseudomonas risk) minimum 6 weeks for osteitis
• Always culture first before antibiotics if purulent

• Daily pin-site care with chlorhexidine or normal saline
• Keep pin sites dry; avoid submersion in water
• Shower allowed with waterproof covers
• Inspect sites at every clinical visit

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✅ Q11 — The Accordion Technique

• Insufficient/poor quality regenerate - when bone mineralisation is inadequate despite adequate distraction rate
• Stimulating healing at non-union sites
• Atrophic non-unions - to biologically activate a failed fracture

1. Distract 1-2 mm beyond target length over 1-2 weeks (creating new stimulus)
2. Then compress back at 1 mm/day to the original or slightly shorter length
3. Repeat cycle 2-3 times as needed
4. Finally, hold at target length and consolidate

• Compression stimulates osteoblastic activity and piezoelectric bone formation
• Distraction stimulates neovascularisation and cellular proliferation (tension-stress effect)
• Cycling between the two creates maximal biological activation of the regenerate
• The cyclical loading also improves mechanical properties of the regenerate by stimulating Wolffs law remodelling

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✅ Q12 — Premature Consolidation vs Insufficient Consolidation

• Lateral bowing = axial deviation of transport segment - correct with frame hinges before it becomes fixed
• Thin column = monitor: slow distraction; consider biological augmentation if no improvement

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✅ Q13 — Docking Site Not Uniting: 1.5 cm Gap with Fibrous Tissue

• CT scan: confirm gap size, bone stock quality, fibrous tissue vs bony contact, alignment
• Blood tests: WBC, ESR, CRP, cultures - rule out occult infection at docking site
• If infected: treat infection FIRST; delay bone grafting until clear cultures

• Compression mode on the frame first (if gap <5 mm and no fibrous tissue) - may achieve union without surgery
• If gap 1.5 cm with fibrous tissue: open surgery required

1. Surgical approach to docking site
2. Excise ALL fibrous and scar tissue - take back to bleeding cancellous bone on both surfaces
3. Multiple drill holes in sclerotic bone ends (Papineau technique) to encourage vascularity
4. Apply compression through the frame to close the gap
5. Autologous bone graft (iliac crest or RIA) packed into the docking site
6. If gap too large to compress: intercalary bone grafting to fill the residual space

• If frame is approaching end of tolerance (long treatment time, pin site problems): consider converting to intramedullary nail after confirmed infection clearance + docking site grafting

• Continue frame in compression mode for 6-8 weeks after bone grafting
• Serial X-rays at 4-week intervals to confirm progressive ossification
• Remove frame only when 3 of 4 cortices are fully corticalised on AP + lateral views

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✅ Q14 — Law of Tension-Stress: Ilizarov's Principle Across All Tissues

"The gradual distraction of living tissues creates a state of metabolic activation that stimulates regeneration and active growth of all tissue components."

• This is why distraction at 1 mm/day in 4 increments is the universal standard - it respects the biological limits of ALL tissues simultaneously, not just bone
• In children, rate can be slightly faster (1.5 mm/day) due to superior biological activity
• In elderly/diabetics/smokers: rates should be SLOWER (0.5-0.75 mm/day)

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📋 QUICK REFERENCE SUMMARY CARD — Ilizarov / Bone Transport

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🏥 AIIMS Gorakhpur — Fracture Clinic

Sajid, 28 years, Male | Right Knee AP + Lateral | 30-Jun-2026

Complete Q&A — Tibial Plateau Fracture

Source: Rockwood & Green 10th Ed (2025) + Campbell's Operative Orthopaedics 15th Ed (2026)

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📋 HOD'S READING

• AP and Lateral views of the RIGHT knee, 28-year-old male
• Lateral tibial plateau fracture — lateral condyle shows a split-depression pattern
• The lateral plateau is depressed and split laterally — classic Schatzker Type II pattern
• On the lateral view: the femoral condyle appears prominent posteriorly, suggesting possible posterior displacement / subluxation of the tibia
• Patella: appears intact on lateral view with a bony fragment posteriorly — possible patella fracture or free body
• Fibula head: appears intact
• 28-year-old male — high-energy injury implied; young active patient — surgery strongly indicated

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🔴 LEVEL 1 — JUNIOR RESIDENT

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Q1. Describe this X-ray systematically. What is the diagnosis?

• AP and Lateral views, RIGHT knee, male 28 years, 30-Jun-2026
• Fracture of the lateral tibial plateau — split-depression pattern
• Lateral condyle is widened on AP view with a depressed articular segment
• On lateral: distal femur sits high, suggesting tibial depression; bony fragment posteriorly (possible avulsion or free body)
• No obvious fibula fracture
• Femoral condyles appear intact
• Diagnosis: Lateral tibial plateau fracture — Schatzker Type II (split-depression)

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Q2. What is the Schatzker Classification? Where does this fracture fit?

This fracture = Schatzker Type II — lateral split-depression

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Q3. What is the mechanism of injury for a lateral tibial plateau fracture?

• Valgus stress + axial loading — the most common mechanism
• The lateral femoral condyle is driven downward into the softer cancellous bone of the lateral tibial plateau
• In young bone (this patient = 28 years): the strong cancellous bone resists pure depression → split fracture occurs first, then the lateral femoral condyle depresses the articular surface → split-depression (Type II)
• In older osteoporotic bone: bone is too weak to split → pure depression (Type III)
• Classic scenario: pedestrian hit by car bumper (bumper fracture), fall from height with valgus, sporting injury (football tackle)

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🟡 LEVEL 2 — SENIOR RESIDENT / MS STUDENT

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Q4. What imaging investigations will you order and why?

Rockwood & Green: CT detects coronal split fragments in 17% of bicondylar fractures that are not visible on plain X-ray. CT changes the classification and operative plan in a significant number of cases.

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Q5. The AP view shows lateral plateau depression. What is the critical measurement on X-ray and CT?

Rockwood & Green (p.1708): "Localised depressions up to 10 mm or more may result in a stable knee with good clinical outcomes... fractures involving large segments of the lateral tibial plateau plus split-depression patterns are likely to lead to valgus malalignment."

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Q6. What are the associated soft tissue injuries in tibial plateau fractures? Which Schatzker types carry the highest risk?

Critical rule: Schatzker Type IV = highest risk of combined ligament + vascular injury. Always check pulses and ABI. Any diminished pulse = urgent vascular surgery consultation.

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Q7. Give the indications for ORIF vs conservative management of tibial plateau fractures.

• Undisplaced or minimally displaced fractures
• Small depressions of lateral plateau WITHOUT instability or deformity
• Elderly, low-demand patients who tolerate subtle deformities
• High surgical risk (significant comorbidities)

• Articular depression >3-5 mm in active patients
• Split-depression fractures (Schatzker II) with significant displacement
• Displaced medial-side injuries (Schatzker IV) — always operative
• Knee instability on examination
• Valgus/varus malalignment
• Open fractures
• Associated vascular injury
• Bicondylar fractures (Schatzker V, VI)

This patient (28M, active, Schatzker II with depression): ORIF strongly indicated.

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🔴 LEVEL 3 — MS / DECISION MAKING

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Q8. You decide to operate on this Schatzker Type II fracture. Describe the surgical approach and fixation strategy step-by-step.

• Anterolateral approach to the lateral tibial plateau (Böhler approach or submeniscal arthrotomy)
• Hockey-stick or straight lateral incision from Gerdy's tubercle
• Reflect iliotibial band; submeniscal arthrotomy to visualise articular surface

• Make a cortical window in the lateral tibial metaphysis (below the articular surface)
• Use a bone tamp or impactor to push the depressed segment UP from below (retrograde elevation)
• Visualise elevation through the arthrotomy
• Confirm anatomic reduction under direct vision AND fluoroscopy

• Pack the void left after elevation with:
  • Autologous iliac crest bone graft (gold standard)
  • Allograft chips
  • Calcium phosphate cement (excellent for maintaining articular reduction — Miller's Review: "Best treatment to prevent loss of articular reduction = lateral plate + rafting screws + calcium phosphate cement")

• Lateral buttress plate (locking or standard) along the lateral tibial cortex
• Rafting screws — multiple horizontal screws placed 5-10 mm below the articular surface, parallel to the joint, to support ("raft") the elevated plateau and prevent re-depression
• At least 2 rafting screws recommended
• Plate protects against valgus collapse

• Repair any torn lateral meniscus root or body (do not discard)
• Close arthrotomy over repair

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Q9. What is the "three-column concept" (Luo Classification) of tibial plateau fractures, and why is it important?

1. The Schatzker system does NOT capture posterior condylar splits — increasingly recognised as common (17% of bicondylar fractures have posterior column involvement)
2. A two-column injury (e.g., Schatzker IV = medial column) requires a different approach than a single-column lateral injury
3. A three-column injury requires separate fixation of each column — often from multiple approaches (anterolateral + posteromedial approaches)
4. Posterior column fractures require a posteromedial approach with a buttress plate applied posteriorly — very different from anterolateral approach

Rockwood & Green: "Schatzker type IV injury that involves the medial tibial plateau is a two-column injury per this scheme."

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Q10. At 1 year, this patient develops knee stiffness and valgus deformity. What are the complications of tibial plateau fractures?

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⚫ LEVEL 4 — HOD / EXAMINER

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Q11. Explain the role of CT in tibial plateau fractures. How does it change management?

Rockwood & Green: CT changes the Schatzker classification in approximately 25-30% of cases compared to plain X-ray alone.

1. Posterior condylar splits (posterolateral, posteromedial) — missed on AP/lateral X-ray in up to 17% of bicondylar cases
2. Exact depth and extent of articular depression — plain X-ray underestimates by up to 40%
3. Plateau widening — exact measurement
4. Coronal split fragments — changes from Schatzker II to a more complex pattern
5. Fracture lines exiting posteriorly — changes approach from anterolateral to combined
6. Involvement of intercondylar eminence (ACL/PCL attachments)
7. 3D reconstruction — helps pre-operative planning and implant selection

• Determines whether single anterolateral approach or dual approach (anterolateral + posteromedial) is needed
• Identifies need for posterior buttress plate in addition to lateral plate
• Affects number and direction of rafting screws

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Q12. What is the role of the external fixator (spanning external fixator) in tibial plateau fractures?

• Severe swelling / fracture blisters — definitive ORIF delayed until soft tissue settles (typically 7-14 days)
• Open fractures — immediate spanning fixator + wound management; ORIF when wound clean
• Polytrauma — DCO (Damage Control Orthopaedics); definitive fixation when patient stable
• Vascular injury — stabilise fracture urgently before vascular repair

• Pins in femur (supracondylar) and tibia (distal) — spanning the knee joint
• Maintains alignment and length
• Allows soft tissue recovery and wound care
• Converted to ORIF when skin wrinkles return (typically 5-14 days)

Critical principle: ORIF of tibial plateau through swollen, blistered skin = high wound complication and infection risk. Staging (temporary external fixator → wait → ORIF) dramatically reduces infection rates in complex fractures.

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Q13. This is a 28-year-old male. At 45, he develops grade IV knee osteoarthritis. What is your management?

1. Conservative: Weight loss, physiotherapy, activity modification, NSAIDs, intra-articular steroids/viscosupplementation
2. Osteotomy: If malalignment (valgus from lateral plateau collapse) — High Tibial Osteotomy (HTO) to shift load to medial compartment; appropriate in younger patients with unicompartmental disease
3. Unicompartmental Knee Replacement (UKR): If isolated compartment arthrosis, good range of motion, intact ligaments; debatable in post-traumatic arthrosis (often more than one compartment)
4. Total Knee Replacement (TKR): For severe tricompartmental post-traumatic arthrosis

• Previous hardware may need removal before TKR (6-12 weeks before TKR)
• Scarred soft tissues → risk of stiffness, wound complications
• Tibial bone defects (from depression + bone graft) → may need augments or stems in tibial component
• Malalignment → constrained implants may be needed
• Ligamentous incompetence → constrained or hinged implant

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Q14. TRAP: The lateral view shows a posterior bony fragment near the knee. What structures must you consider in a 28-year-old male with a knee injury and posterior bony fragment?

HOD Point: In a 28-year-old male with a tibial plateau fracture, posterior soft tissue injury is NOT a minor finding. A posterior tibial avulsion in the context of a knee fracture = possible PCL injury = potential knee instability. Always get MRI.

ALWAYS check popliteal pulse + ABI in tibial plateau fractures — popliteal artery runs in the popliteal fossa directly posterior to the plateau. Posterior displacement can tether or lacerate it.

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📋 QUICK REFERENCE SUMMARY CARD — Tibial Plateau Fractures

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🏥 AIIMS Gorakhpur — Fracture Clinic

Sajid, 28 years, Male | Right Knee | PATELLA FRACTURE

Rockwood & Green 10th Ed (2025) + Campbell's Operative Orthopaedics 15th Ed (2026)

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📋 HOD'S CORRECTED READING

• AP and Lateral views of the RIGHT knee, 28-year-old male
• Lateral view: The patella shows a fracture — appears to be a transverse fracture with separation of fragments (superior and inferior poles visible separately)
• The fragments are displaced (gap between them) suggesting disruption of the extensor mechanism
• AP view: patella appears disrupted; fragments visible
• Distal femur and tibial plateau: appear intact
• Diagnosis: Displaced transverse patella fracture — extensor mechanism disrupted

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❓ COMPLETE Q&A — PATELLA FRACTURE

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🔴 LEVEL 1 — JUNIOR RESIDENT

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• AP and Lateral views, right knee, male 28 years, 30-Jun-2026
• Lateral view (most informative): Patella is fractured — a transverse fracture pattern with visible gap between fragments; superior fragment displaced proximally by quadriceps pull; inferior fragment displaced distally by patellar tendon pull
• AP view: Patella shows disruption of its outline; fracture line visible
• Knee joint: tibiofemoral alignment appears maintained
• Diagnosis: Displaced transverse fracture of the patella with disruption of the extensor mechanism

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• The patella is supplied by a peripatellar anastomotic ring formed by branches of:
  • Genicular arteries (superior medial, superior lateral, inferior medial, inferior lateral — branches of popliteal artery)
  • Anterior tibial recurrent artery
  • Descending genicular artery (from femoral)
• Blood enters the patella mainly through the anterior surface and distal pole (middle third of anterior surface = main entry point)
• The proximal pole receives the least blood supply

• Proximal pole (upper third) fractures = highest risk of avascular necrosis (AVN) of the proximal fragment
• Extensive soft tissue stripping during surgery devascularises fragments → risk of non-union and AVN
• Handle fragments gently; preserve periosteum and soft tissue attachments

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• Pain, swelling, tenderness over the anterior knee
• Visible/palpable gap between fragments (transverse fractures)
• Haemarthrosis — large, tense joint effusion
• Bruising over the anterior knee

• Ask the patient to actively extend the knee against gravity (or perform a straight leg raise)
• If CANNOT perform: Extensor mechanism disrupted = surgical repair required
• If CAN perform (even weakly): Extensor mechanism partially intact = may consider conservative management

• Check full active extension against gravity
• Aspirate the haemarthrosis for comfort AND examine for fat droplets (indicates intra-articular fracture)
• Neurovascular examination of the limb

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🟡 LEVEL 2 — SENIOR RESIDENT / MS STUDENT

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• Code: 34-A, B, C (34 = patella)
• 34-A: Extra-articular (avulsion)
• 34-B: Partial articular (vertical/longitudinal)
• 34-C: Complete articular (transverse, stellate, comminuted)

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HOD Rule: In a 28-year-old active male with displaced transverse fracture and a visible gap — ORIF is mandatory.

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• The anterior surface of the patella is under TENSION during knee flexion (the quadriceps force distracts the anterior cortex)
• The articular (posterior) surface is under COMPRESSION against the femoral condyle during flexion
• A wire placed on the anterior surface converts the distracting tension force into compression at the articular surface
• This is the classic tension band — it transforms tension into compression where it is needed most (the articular side)

1. Two parallel K-wires (1.6 or 2.0 mm) inserted longitudinally through both fragments (parallel, vertical, just anterior to the articular surface)
2. An 18-gauge stainless steel wire is looped in a figure-of-8 pattern around the anterior surface of the K-wires and through the quadriceps tendon proximally and patellar tendon distally
3. The wire is tightened to compress the fracture
4. Wire ends buried to prevent soft tissue irritation

• Every time the patient flexes the knee, the quadriceps force increases compression at the fracture site rather than distracting it
• Allows early active mobilisation which is essential for articular cartilage nutrition
• Converts a tension-loaded fracture into a compression-loaded one

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🔴 LEVEL 3 — MS / DECISION MAKING

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1. Evacuate haemarthrosis; wash out joint
2. Assess the fracture — confirm it is transverse, 2 fragments; inspect articular surface
3. Reduce the fracture with towel clips or pointed reduction forceps — confirm under direct vision AND by palpating the articular surface through the joint; check fluoroscopy
4. Insert two 1.6 mm K-wires longitudinally through the proximal fragment, across the fracture, into the distal fragment — parallel; just anterior to articular cartilage
5. Bend K-wire ends over proximally and distally (hooks) to prevent migration
6. Pass 18-gauge wire through the quadriceps tendon above, cross over the anterior surface in a figure-of-8, thread under the patellar tendon below
7. Tighten both ends of the wire with wire twisters simultaneously — do not tighten one side only (creates asymmetric compression)
8. Flex the knee to 90° on table — confirm fracture compresses (does not gap) under fluoroscopy
9. Repair the medial and lateral retinacular tears with absorbable sutures (important — prevents patellar subluxation)
10. Close layered; drain optional

• Active ROM from day 1-2 (early mobilisation = key advantage of TBW)
• Weight-bearing as tolerated in a knee brace
• Straight leg raises from day 1

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• K-wires inserted longitudinally through the patella can migrate proximally into the quadriceps muscle or even into the hip, or distally into the patellar tendon and tibial tuberosity area
• In rare cases, migration into the knee joint has been reported, causing cartilage damage

• The K-wire is a smooth pin — no thread to hold it in bone
• Repeated knee flexion-extension pumps the wire proximally or distally (the "sleigh-ride" phenomenon)
• Inadequate bending/hooking of the wire ends

1. Always bend the distal and proximal ends of K-wires into a hook/J shape after insertion — creates a mechanical stop
2. Bury the bent ends into the tendon substance
3. Use cannulated screws instead of K-wires (threads provide rotational stability and prevent migration)
4. Warn the patient — if they feel a "lump moving" or have new pain = urgent X-ray

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⚫ LEVEL 4 — HOD / EXAMINER

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• For polar fractures where one fragment (usually inferior/superior pole) is too small or comminuted to fix
• Technique: excise the small un-fixable fragment; reattach the quadriceps or patellar tendon directly to the remaining bone with suture anchors or through bone tunnels
• Outcome: Good if remaining patellar bone is adequate (>50% of patella retained)

• For severely comminuted fractures not amenable to reconstruction
• Also for: failed ORIF, infected patella, pathological fractures

• The patella increases the mechanical advantage of the quadriceps by acting as a lever arm — it increases the moment arm by approximately 30-50%
• Total patellectomy = 30-40% reduction in quadriceps strength at all angles of flexion
• This results in: difficulty ascending stairs, rising from chairs, functional weakness
• The extensor mechanism is reconstructed by direct repair of quadriceps to patellar tendon — but the lever arm is permanently lost

Teaching point: Preserve every possible patellar fragment. Total patellectomy is a last resort. Even a comminuted patella should be reconstructed if >30-40% of articular cartilage can be saved.

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1. Quadriceps femoris muscle (rectus femoris + vastus medialis + vastus lateralis + vastus intermedius)
2. Quadriceps tendon (inserts into superior pole of patella)
3. Patella (sesamoid bone in the quadriceps tendon; increases lever arm)
4. Patellar tendon / ligament (from inferior pole of patella to tibial tuberosity)
5. Medial and lateral retinaculum (expansions of vastus medialis and lateralis; provide secondary extension even if patellar tendon disrupted)

• The quadriceps tendon pulls the proximal fragment superiorly
• The patellar tendon pulls the distal fragment inferiorly
• The medial and lateral retinacula are TORN (otherwise the patella cannot separate)
• Result: Complete extensor mechanism failure — patient cannot extend the knee against gravity
• Note: If retinaculum is intact → fracture may be displaced but patient can still extend (partial)

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• Wire failure = loss of tension band = fracture likely to redisplace/re-separate
• Cannot extend = extensor mechanism disrupted again
• X-ray confirms hardware failure

1. Urgent return to OT — fracture may not have united yet (only 6 months)
2. Remove all broken hardware
3. Assess fracture union status: if NOT united (likely at 6 months with hardware failure) → revision ORIF
4. If fracture united but retinaculum torn again → soft tissue repair

• Cannulated screws (4.0 or 4.5 mm) + anterior tension band wire — more stable than K-wires alone; prevents migration; better rotational control
• Locking plate if comminuted
• Add bone graft if gap or non-union biology

• Extend non-weight-bearing period
• Restrict flexion to 60° for 6 weeks post-revision
• Accelerated physiotherapy only after X-ray confirms union

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• In a stellate/comminuted fracture from a direct blow (fall on flexed knee):
  • The fracture is comminuted but the fragments are held together by intact periosteum
  • The medial and lateral retinacula are INTACT (direct blow does not rupture them; they rupture in tension/avulsion injuries)
  • Intact retinaculum = active extension preserved even with displaced articular fracture

• Can she perform straight leg raise / active extension? YES → retinacula intact
• X-ray: degree of articular step-off? Gap between fragments?

HOD Teaching: The ability to actively extend the knee is the single most important clinical finding in patella fractures. It determines operative vs non-operative management MORE than X-ray findings alone.

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📋 QUICK REFERENCE SUMMARY CARD — Patella Fractures

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