Give detailed description about osteotomy from basics to advanced level with all the types, where it will be performed

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Osteotomy is a broad operative topic spanning orthopaedics, maxillofacial surgery, and foot-and-ankle surgery. I can cover it systematically.

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Osteotomy is a broad operative topic spanning orthopaedics, maxillofacial surgery, and foot-and-ankle surgery. I can cover it systematically.Osteotomy means a controlled surgical cut of bone to correct alignment, rotation, length, joint loading, or deformity. It is used across orthopaedics, foot and ankle surgery, and maxillofacial surgery.

Topic map

Core principles
- Definition, objectives, preoperative planning, imaging, fixation, bone healing, rehabilitation
Classification by bone-cut pattern
- Opening-wedge, closing-wedge, dome, transverse, oblique, chevron, rotational, step-cut, and distraction osteotomy
Lower-limb osteotomies
- Femur, tibia, fibula, pelvis, hip, knee, ankle, foot, and toes
Upper-limb osteotomies
- Humerus, radius, ulna, wrist, and hand
Spinal osteotomies
- Smith-Petersen/Ponte, pedicle-subtraction, vertebral-column resection
Craniofacial and jaw osteotomies
- Le Fort, sagittal split mandibular, genioplasty, and cranial vault procedures
Technique and fixation
- Plates, screws, intramedullary devices, external fixators, bone grafts, and computer-assisted planning
Complications and outcomes
- Neurovascular injury, infection, nonunion, malunion, loss of correction, compartment syndrome, thrombosis, hardware problems, and adjacent-joint effects.

High-level overview

The central principle is mechanical realignment. For example, a high tibial osteotomy can move load away from the worn medial compartment of a varus knee; a femoral osteotomy can correct hip dysplasia-related mechanics; a rotational osteotomy can correct excessive femoral anteversion or tibial torsion.

Osteotomies may be performed near a joint to preserve the native joint and delay or avoid arthroplasty, or at the site of a healed malunion to restore anatomy and function. Success depends on accurate deformity analysis in multiple planes: coronal alignment, sagittal alignment, rotation, limb length, and joint orientation.

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General principles and all cut types
Hip and pelvic osteotomies
Knee, femur, and tibial osteotomies
Foot and ankle osteotomies
Spine osteotomies
Jaw and facial osteotomies

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osteotomy overview types opening wedge closing wedge dome reputable orthopedic source

Osteotomy: Structured Study Map

OSTEOTOMY
│
├── 1. BASICS
│   ├── Definition
│   │   └── A planned surgical division and repositioning of bone.
│   ├── Main aims
│   │   ├── Correct angular deformity
│   │   ├── Correct rotational deformity
│   │   ├── Correct limb-length discrepancy
│   │   ├── Redistribute load across a joint
│   │   ├── Improve joint congruence or stability
│   │   └── Correct malunion after fracture
│   ├── Main settings
│   │   ├── Congenital deformity
│   │   ├── Developmental deformity
│   │   ├── Post-traumatic malunion
│   │   ├── Degenerative joint disease with malalignment
│   │   ├── Neuromuscular disease
│   │   └── Tumor reconstruction or salvage surgery
│   └── Principle
│       └── Bone is cut at a planned site, repositioned, and held until union.
│
├── 2. PREOPERATIVE ASSESSMENT AND PLANNING
│   ├── Clinical assessment
│   │   ├── Pain, gait, instability, function
│   │   ├── Range of motion and joint status
│   │   ├── Limb length
│   │   ├── Rotation profile
│   │   └── Neurovascular and soft-tissue examination
│   ├── Imaging
│   │   ├── Standing long-leg radiographs
│   │   ├── AP and lateral radiographs
│   │   ├── CT for torsion and complex deformity
│   │   ├── MRI for cartilage, meniscus, ligament, or osteonecrosis
│   │   └── 3-dimensional imaging/planning in selected complex cases
│   ├── Deformity analysis
│   │   ├── Coronal plane: varus or valgus
│   │   ├── Sagittal plane: flexion, extension, slope
│   │   ├── Axial plane: internal or external rotation
│   │   ├── Translation
│   │   └── Length discrepancy
│   └── Planning questions
│       ├── What is the deformity?
│       ├── Where is its apex?
│       ├── At which bone level should correction occur?
│       ├── How many degrees or millimetres are required?
│       └── Which fixation and rehabilitation plan is suitable?
│
├── 3. TYPES OF OSTEOTOMY BY BONE-CUT DESIGN
│   │
│   ├── A. Closing-wedge osteotomy
│   │   ├── A bone wedge is removed.
│   │   ├── Remaining bone surfaces are closed together.
│   │   ├── Advantages: direct bone contact and often stable fixation.
│   │   ├── Limitations: shortens bone and requires wedge removal.
│   │   └── Examples: lateral closing-wedge high tibial osteotomy,
│   │       distal femoral osteotomy, calcaneal Dwyer osteotomy.
│   │
│   ├── B. Opening-wedge osteotomy
│   │   ├── Bone is cut and the gap is opened to create correction.
│   │   ├── The gap may be supported with graft or a spacer.
│   │   ├── Advantages: preserves length and allows gradual adjustment.
│   │   ├── Limitations: hinge fracture, delayed union, implant stress.
│   │   └── Example: medial opening-wedge high tibial osteotomy.
│   │
│   ├── C. Dome osteotomy
│   │   ├── Curved cut allowing correction around a central axis.
│   │   ├── Can correct large angular deformity with little shortening.
│   │   └── Often used in complex deformity correction.
│   │
│   ├── D. Transverse osteotomy
│   │   ├── Straight cut across the bone.
│   │   ├── Useful for rotation, translation, shortening, or lengthening.
│   │   └── Common in derotational femoral or tibial osteotomy.
│   │
│   ├── E. Oblique osteotomy
│   │   ├── Diagonal bone cut.
│   │   ├── Creates a broad contact area.
│   │   └── Used where angular and translational correction is needed.
│   │
│   ├── F. Chevron osteotomy
│   │   ├── V-shaped cut.
│   │   ├── Provides inherent bony stability.
│   │   └── Common in first metatarsal surgery for hallux valgus.
│   │
│   ├── G. Step-cut osteotomy
│   │   ├── Interlocking stepped cut.
│   │   ├── Good rotational stability and surface contact.
│   │   └── Used in selected rotational corrections.
│   │
│   ├── H. Rotational/derotational osteotomy
│   │   ├── Bone segments are rotated around the long axis.
│   │   └── Used for excessive femoral anteversion, retroversion,
│   │       internal tibial torsion, or external tibial torsion.
│   │
│   ├── I. Distraction osteotomy
│   │   ├── Bone is divided and gradually distracted with an external
│   │   │   fixator or lengthening nail.
│   │   ├── New bone forms in the slowly enlarging gap.
│   │   └── Used for limb lengthening and severe multiplanar deformity.
│   │
│   └── J. Intra-articular osteotomy
│       ├── Performed close to or through the joint surface.
│       ├── Restores joint congruity after an intra-articular malunion.
│       └── Requires precise planning because cartilage and joint
│           stability may be affected.
│
├── 4. LOWER-LIMB OSTEOTOMIES
│   │
│   ├── A. Hip and pelvis
│   │   ├── Femoral varus osteotomy
│   │   │   └── May improve femoral head containment in selected children.
│   │   ├── Femoral valgus osteotomy
│   │   │   └── Used in selected proximal femoral deformities and nonunion.
│   │   ├── Femoral derotational osteotomy
│   │   │   └── Corrects abnormal femoral version/torsion.
│   │   ├── Periacetabular osteotomy (PAO)
│   │   │   └── Reorients the acetabulum in symptomatic hip dysplasia
│   │   │       with a sufficiently preserved joint.
│   │   ├── Salter innominate osteotomy
│   │   │   └── Pediatric pelvic procedure for acetabular reorientation.
│   │   ├── Pemberton acetabuloplasty
│   │   ├── Dega acetabuloplasty
│   │   ├── Chiari pelvic osteotomy
│   │   └── Shelf acetabuloplasty
│   │
│   ├── B. Knee: tibia and femur
│   │   ├── High tibial osteotomy (HTO)
│   │   │   ├── Usually performed at the proximal tibia.
│   │   │   ├── Corrects varus alignment in selected patients with
│   │   │   │   medial-compartment knee osteoarthritis.
│   │   │   ├── Medial opening-wedge HTO
│   │   │   └── Lateral closing-wedge HTO
│   │   ├── Distal femoral osteotomy (DFO)
│   │   │   ├── Performed above the knee.
│   │   │   └── Usually corrects valgus alignment and unloads the
│   │   │       lateral knee compartment.
│   │   ├── Tibial tubercle osteotomy
│   │   │   ├── Moves the patellar tendon attachment.
│   │   │   └── Used in selected patellofemoral instability or overload.
│   │   └── Tibial slope-changing osteotomy
│   │       └── Selected cases of recurrent ACL graft failure with
│   │           excessive posterior tibial slope.
│   │
│   ├── C. Leg, ankle, and hindfoot
│   │   ├── Supramalleolar tibial osteotomy
│   │   │   └── Corrects distal tibial varus or valgus near the ankle.
│   │   ├── Fibular osteotomy
│   │   │   └── May accompany tibial correction to permit realignment.
│   │   ├── Calcaneal lateralizing slide osteotomy
│   │   │   └── Shifts the heel laterally for hindfoot varus correction.
│   │   ├── Calcaneal medializing slide osteotomy
│   │   │   └── Shifts the heel medially in selected flatfoot deformity.
│   │   ├── Dwyer calcaneal osteotomy
│   │   │   └── Lateral closing-wedge correction for cavovarus hindfoot.
│   │   └── Anterior calcaneal lengthening osteotomy
│   │       └── Lengthens lateral column in selected flexible flatfoot.
│   │
│   └── D. Forefoot and toes
│       ├── Distal first-metatarsal chevron osteotomy
│       ├── Scarf osteotomy of the first metatarsal
│       ├── Proximal first-metatarsal osteotomy
│       ├── Akin osteotomy of the proximal phalanx
│       ├── Weil lesser-metatarsal osteotomy
│       ├── Closing-wedge or opening-wedge metatarsal osteotomy
│       └── Cuneiform/cuboid osteotomies for selected fixed foot deformities
│
├── 5. UPPER-LIMB OSTEOTOMIES
│   │
│   ├── A. Humerus
│   │   ├── Supracondylar humeral osteotomy
│   │   │   └── Corrects cubitus varus or cubitus valgus after childhood
│   │   │       elbow fracture malunion.
│   │   └── Proximal humeral osteotomy
│   │       └── Selected deformity, malunion, or reconstruction cases.
│   │
│   ├── B. Forearm
│   │   ├── Radial osteotomy
│   │   ├── Ulnar osteotomy
│   │   ├── Combined radius-ulna osteotomy
│   │   └── Corrective osteotomy for malunited forearm fractures or
│   │       congenital deformities.
│   │
│   ├── C. Wrist
│   │   ├── Radial shortening osteotomy
│   │   │   └── May unload the ulnocarpal joint in ulnar impaction.
│   │   ├── Ulnar shortening osteotomy
│   │   ├── Radial opening-wedge osteotomy
│   │   │   └── Used for selected distal radius malunions.
│   │   └── Closing-wedge radial osteotomy
│   │
│   └── D. Hand
│       ├── Metacarpal osteotomy
│       ├── Phalangeal osteotomy
│       └── Used for angular, rotational, or length-related deformity.
│
├── 6. SPINAL OSTEOTOMIES
│   │
│   ├── Purpose
│   │   └── Correct rigid sagittal, coronal, or multiplanar spinal deformity.
│   ├── Ponte or Smith-Petersen osteotomy
│   │   ├── Posterior-column shortening osteotomy.
│   │   ├── Requires a mobile anterior disc space.
│   │   └── Often used for moderate correction across several levels.
│   ├── Pedicle-subtraction osteotomy (PSO)
│   │   ├── Wedge of posterior elements and vertebral body is removed.
│   │   ├── Produces substantial correction at one level.
│   │   └── Used for rigid sagittal imbalance in selected cases.
│   ├── Vertebral-column resection (VCR)
│   │   ├── Removal of part or all of one or more vertebrae.
│   │   ├── Provides the greatest correction.
│   │   └── Reserved for severe, rigid deformity because risk is high.
│   └── Risks
│       ├── Neurological injury
│       ├── Major blood loss
│       ├── Dural tear
│       ├── Nonunion
│       └── Implant failure
│
├── 7. CRANIOFACIAL AND JAW OSTEOTOMIES
│   │
│   ├── A. Maxilla
│   │   ├── Le Fort I osteotomy
│   │   │   └── Repositions the upper jaw in three dimensions.
│   │   ├── Le Fort II osteotomy
│   │   └── Le Fort III osteotomy
│   │       └── Used in more extensive midfacial deformity correction.
│   ├── B. Mandible
│   │   ├── Bilateral sagittal split osteotomy (BSSO)
│   │   │   └── Advances, sets back, or rotates the lower jaw.
│   │   ├── Vertical ramus osteotomy
│   │   ├── Genioplasty
│   │   │   └── Repositions the chin.
│   │   └── Segmental mandibular osteotomy
│   ├── C. Cranial vault
│   │   ├── Fronto-orbital advancement
│   │   ├── Cranial vault remodeling
│   │   └── Used in selected craniosynostosis and craniofacial disorders.
│   └── Main goals
│       ├── Correct malocclusion
│       ├── Improve facial skeletal balance
│       ├── Improve airway in selected cases
│       └── Protect the brain or allow cranial growth in children
│
├── 8. FIXATION AND BONE-GAP MANAGEMENT
│   ├── Internal fixation
│   │   ├── Plates and screws
│   │   ├── Locking plates
│   │   ├── Compression screws
│   │   ├── Intramedullary nails
│   │   └── Staples in selected small-bone procedures
│   ├── External fixation
│   │   ├── Circular Ilizarov-type frame
│   │   ├── Hexapod frame
│   │   └── Monolateral frame
│   ├── Bone graft or substitute
│   │   ├── Autograft
│   │   ├── Allograft
│   │   └── Synthetic graft material
│   └── Choice depends on
│       ├── Bone location and quality
│       ├── Type and size of correction
│       ├── Need for lengthening
│       ├── Patient age and activity
│       └── Risk of nonunion
│
├── 9. HEALING AND REHABILITATION
│   ├── Healing stages
│   │   ├── Inflammation
│   │   ├── Soft callus formation
│   │   ├── Hard callus/mineralization
│   │   └── Remodeling
│   ├── Rehabilitation
│   │   ├── Pain and swelling control
│   │   ├── Protection of the osteotomy
│   │   ├── Weight-bearing restrictions or progression as prescribed
│   │   ├── Range-of-motion exercises
│   │   ├── Muscle strengthening
│   │   └── Gait retraining and return-to-sport/work planning
│   └── Follow-up
│       ├── Serial clinical assessment
│       └── Radiographs to check correction, fixation, and union
│
└── 10. COMPLICATIONS
    ├── General surgical
    │   ├── Anesthesia-related events
    │   ├── Bleeding or hematoma
    │   ├── Infection
    │   ├── Deep-vein thrombosis or pulmonary embolism
    │   └── Wound-healing problems
    ├── Bone-related
    │   ├── Delayed union
    │   ├── Nonunion
    │   ├── Malunion
    │   ├── Loss of correction
    │   ├── Hinge fracture in opening-wedge procedures
    │   └── Bone graft failure or collapse
    ├── Implant-related
    │   ├── Plate/screw irritation
    │   ├── Screw loosening
    │   ├── Plate breakage
    │   └── Need for later implant removal
    ├── Neurovascular
    │   ├── Nerve injury
    │   ├── Vessel injury
    │   └── Compartment syndrome, particularly in limb procedures
    └── Functional
        ├── Stiffness
        ├── Persistent pain
        ├── Under-correction or over-correction
        ├── Adjacent-joint overload
        └── Progression of underlying arthritis

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Topic map

Core principles
- Definition, objectives, preoperative planning, imaging, fixation, bone healing, rehabilitation
Classification by bone-cut pattern
- Opening-wedge, closing-wedge, dome, transverse, oblique, chevron, rotational, step-cut, and distraction osteotomy
Lower-limb osteotomies
- Femur, tibia, fibula, pelvis, hip, knee, ankle, foot, and toes
Upper-limb osteotomies
- Humerus, radius, ulna, wrist, and hand
Spinal osteotomies
- Smith-Petersen/Ponte, pedicle-subtraction, vertebral-column resection
Craniofacial and jaw osteotomies
- Le Fort, sagittal split mandibular, genioplasty, and cranial vault procedures
Technique and fixation
- Plates, screws, intramedullary devices, external fixators, bone grafts, and computer-assisted planning
Complications and outcomes
- Neurovascular injury, infection, nonunion, malunion, loss of correction, compartment syndrome, thrombosis, hardware problems, and adjacent-joint effects.

High-level overview

Which section should I explain in full first?

General principles and all cut types
Hip and pelvic osteotomies
Knee, femur, and tibial osteotomies
Foot and ankle osteotomies
Spine osteotomies
Jaw and facial osteotomies# Osteotomy: Structured Study Map

OSTEOTOMY
│
├── 1. BASICS
│   ├── Definition
│   │   └── A planned surgical division and repositioning of bone.
│   ├── Main aims
│   │   ├── Correct angular deformity
│   │   ├── Correct rotational deformity
│   │   ├── Correct limb-length discrepancy
│   │   ├── Redistribute load across a joint
│   │   ├── Improve joint congruence or stability
│   │   └── Correct malunion after fracture
│   ├── Main settings
│   │   ├── Congenital deformity
│   │   ├── Developmental deformity
│   │   ├── Post-traumatic malunion
│   │   ├── Degenerative joint disease with malalignment
│   │   ├── Neuromuscular disease
│   │   └── Tumor reconstruction or salvage surgery
│   └── Principle
│       └── Bone is cut at a planned site, repositioned, and held until union.
│
├── 2. PREOPERATIVE ASSESSMENT AND PLANNING
│   ├── Clinical assessment
│   │   ├── Pain, gait, instability, function
│   │   ├── Range of motion and joint status
│   │   ├── Limb length
│   │   ├── Rotation profile
│   │   └── Neurovascular and soft-tissue examination
│   ├── Imaging
│   │   ├── Standing long-leg radiographs
│   │   ├── AP and lateral radiographs
│   │   ├── CT for torsion and complex deformity
│   │   ├── MRI for cartilage, meniscus, ligament, or osteonecrosis
│   │   └── 3-dimensional imaging/planning in selected complex cases
│   ├── Deformity analysis
│   │   ├── Coronal plane: varus or valgus
│   │   ├── Sagittal plane: flexion, extension, slope
│   │   ├── Axial plane: internal or external rotation
│   │   ├── Translation
│   │   └── Length discrepancy
│   └── Planning questions
│       ├── What is the deformity?
│       ├── Where is its apex?
│       ├── At which bone level should correction occur?
│       ├── How many degrees or millimetres are required?
│       └── Which fixation and rehabilitation plan is suitable?
│
├── 3. TYPES OF OSTEOTOMY BY BONE-CUT DESIGN
│   │
│   ├── A. Closing-wedge osteotomy
│   │   ├── A bone wedge is removed.
│   │   ├── Remaining bone surfaces are closed together.
│   │   ├── Advantages: direct bone contact and often stable fixation.
│   │   ├── Limitations: shortens bone and requires wedge removal.
│   │   └── Examples: lateral closing-wedge high tibial osteotomy,
│   │       distal femoral osteotomy, calcaneal Dwyer osteotomy.
│   │
│   ├── B. Opening-wedge osteotomy
│   │   ├── Bone is cut and the gap is opened to create correction.
│   │   ├── The gap may be supported with graft or a spacer.
│   │   ├── Advantages: preserves length and allows gradual adjustment.
│   │   ├── Limitations: hinge fracture, delayed union, implant stress.
│   │   └── Example: medial opening-wedge high tibial osteotomy.
│   │
│   ├── C. Dome osteotomy
│   │   ├── Curved cut allowing correction around a central axis.
│   │   ├── Can correct large angular deformity with little shortening.
│   │   └── Often used in complex deformity correction.
│   │
│   ├── D. Transverse osteotomy
│   │   ├── Straight cut across the bone.
│   │   ├── Useful for rotation, translation, shortening, or lengthening.
│   │   └── Common in derotational femoral or tibial osteotomy.
│   │
│   ├── E. Oblique osteotomy
│   │   ├── Diagonal bone cut.
│   │   ├── Creates a broad contact area.
│   │   └── Used where angular and translational correction is needed.
│   │
│   ├── F. Chevron osteotomy
│   │   ├── V-shaped cut.
│   │   ├── Provides inherent bony stability.
│   │   └── Common in first metatarsal surgery for hallux valgus.
│   │
│   ├── G. Step-cut osteotomy
│   │   ├── Interlocking stepped cut.
│   │   ├── Good rotational stability and surface contact.
│   │   └── Used in selected rotational corrections.
│   │
│   ├── H. Rotational/derotational osteotomy
│   │   ├── Bone segments are rotated around the long axis.
│   │   └── Used for excessive femoral anteversion, retroversion,
│   │       internal tibial torsion, or external tibial torsion.
│   │
│   ├── I. Distraction osteotomy
│   │   ├── Bone is divided and gradually distracted with an external
│   │   │   fixator or lengthening nail.
│   │   ├── New bone forms in the slowly enlarging gap.
│   │   └── Used for limb lengthening and severe multiplanar deformity.
│   │
│   └── J. Intra-articular osteotomy
│       ├── Performed close to or through the joint surface.
│       ├── Restores joint congruity after an intra-articular malunion.
│       └── Requires precise planning because cartilage and joint
│           stability may be affected.
│
├── 4. LOWER-LIMB OSTEOTOMIES
│   │
│   ├── A. Hip and pelvis
│   │   ├── Femoral varus osteotomy
│   │   │   └── May improve femoral head containment in selected children.
│   │   ├── Femoral valgus osteotomy
│   │   │   └── Used in selected proximal femoral deformities and nonunion.
│   │   ├── Femoral derotational osteotomy
│   │   │   └── Corrects abnormal femoral version/torsion.
│   │   ├── Periacetabular osteotomy (PAO)
│   │   │   └── Reorients the acetabulum in symptomatic hip dysplasia
│   │   │       with a sufficiently preserved joint.
│   │   ├── Salter innominate osteotomy
│   │   │   └── Pediatric pelvic procedure for acetabular reorientation.
│   │   ├── Pemberton acetabuloplasty
│   │   ├── Dega acetabuloplasty
│   │   ├── Chiari pelvic osteotomy
│   │   └── Shelf acetabuloplasty
│   │
│   ├── B. Knee: tibia and femur
│   │   ├── High tibial osteotomy (HTO)
│   │   │   ├── Usually performed at the proximal tibia.
│   │   │   ├── Corrects varus alignment in selected patients with
│   │   │   │   medial-compartment knee osteoarthritis.
│   │   │   ├── Medial opening-wedge HTO
│   │   │   └── Lateral closing-wedge HTO
│   │   ├── Distal femoral osteotomy (DFO)
│   │   │   ├── Performed above the knee.
│   │   │   └── Usually corrects valgus alignment and unloads the
│   │   │       lateral knee compartment.
│   │   ├── Tibial tubercle osteotomy
│   │   │   ├── Moves the patellar tendon attachment.
│   │   │   └── Used in selected patellofemoral instability or overload.
│   │   └── Tibial slope-changing osteotomy
│   │       └── Selected cases of recurrent ACL graft failure with
│   │           excessive posterior tibial slope.
│   │
│   ├── C. Leg, ankle, and hindfoot
│   │   ├── Supramalleolar tibial osteotomy
│   │   │   └── Corrects distal tibial varus or valgus near the ankle.
│   │   ├── Fibular osteotomy
│   │   │   └── May accompany tibial correction to permit realignment.
│   │   ├── Calcaneal lateralizing slide osteotomy
│   │   │   └── Shifts the heel laterally for hindfoot varus correction.
│   │   ├── Calcaneal medializing slide osteotomy
│   │   │   └── Shifts the heel medially in selected flatfoot deformity.
│   │   ├── Dwyer calcaneal osteotomy
│   │   │   └── Lateral closing-wedge correction for cavovarus hindfoot.
│   │   └── Anterior calcaneal lengthening osteotomy
│   │       └── Lengthens lateral column in selected flexible flatfoot.
│   │
│   └── D. Forefoot and toes
│       ├── Distal first-metatarsal chevron osteotomy
│       ├── Scarf osteotomy of the first metatarsal
│       ├── Proximal first-metatarsal osteotomy
│       ├── Akin osteotomy of the proximal phalanx
│       ├── Weil lesser-metatarsal osteotomy
│       ├── Closing-wedge or opening-wedge metatarsal osteotomy
│       └── Cuneiform/cuboid osteotomies for selected fixed foot deformities
│
├── 5. UPPER-LIMB OSTEOTOMIES
│   │
│   ├── A. Humerus
│   │   ├── Supracondylar humeral osteotomy
│   │   │   └── Corrects cubitus varus or cubitus valgus after childhood
│   │   │       elbow fracture malunion.
│   │   └── Proximal humeral osteotomy
│   │       └── Selected deformity, malunion, or reconstruction cases.
│   │
│   ├── B. Forearm
│   │   ├── Radial osteotomy
│   │   ├── Ulnar osteotomy
│   │   ├── Combined radius-ulna osteotomy
│   │   └── Corrective osteotomy for malunited forearm fractures or
│   │       congenital deformities.
│   │
│   ├── C. Wrist
│   │   ├── Radial shortening osteotomy
│   │   │   └── May unload the ulnocarpal joint in ulnar impaction.
│   │   ├── Ulnar shortening osteotomy
│   │   ├── Radial opening-wedge osteotomy
│   │   │   └── Used for selected distal radius malunions.
│   │   └── Closing-wedge radial osteotomy
│   │
│   └── D. Hand
│       ├── Metacarpal osteotomy
│       ├── Phalangeal osteotomy
│       └── Used for angular, rotational, or length-related deformity.
│
├── 6. SPINAL OSTEOTOMIES
│   │
│   ├── Purpose
│   │   └── Correct rigid sagittal, coronal, or multiplanar spinal deformity.
│   ├── Ponte or Smith-Petersen osteotomy
│   │   ├── Posterior-column shortening osteotomy.
│   │   ├── Requires a mobile anterior disc space.
│   │   └── Often used for moderate correction across several levels.
│   ├── Pedicle-subtraction osteotomy (PSO)
│   │   ├── Wedge of posterior elements and vertebral body is removed.
│   │   ├── Produces substantial correction at one level.
│   │   └── Used for rigid sagittal imbalance in selected cases.
│   ├── Vertebral-column resection (VCR)
│   │   ├── Removal of part or all of one or more vertebrae.
│   │   ├── Provides the greatest correction.
│   │   └── Reserved for severe, rigid deformity because risk is high.
│   └── Risks
│       ├── Neurological injury
│       ├── Major blood loss
│       ├── Dural tear
│       ├── Nonunion
│       └── Implant failure
│
├── 7. CRANIOFACIAL AND JAW OSTEOTOMIES
│   │
│   ├── A. Maxilla
│   │   ├── Le Fort I osteotomy
│   │   │   └── Repositions the upper jaw in three dimensions.
│   │   ├── Le Fort II osteotomy
│   │   └── Le Fort III osteotomy
│   │       └── Used in more extensive midfacial deformity correction.
│   ├── B. Mandible
│   │   ├── Bilateral sagittal split osteotomy (BSSO)
│   │   │   └── Advances, sets back, or rotates the lower jaw.
│   │   ├── Vertical ramus osteotomy
│   │   ├── Genioplasty
│   │   │   └── Repositions the chin.
│   │   └── Segmental mandibular osteotomy
│   ├── C. Cranial vault
│   │   ├── Fronto-orbital advancement
│   │   ├── Cranial vault remodeling
│   │   └── Used in selected craniosynostosis and craniofacial disorders.
│   └── Main goals
│       ├── Correct malocclusion
│       ├── Improve facial skeletal balance
│       ├── Improve airway in selected cases
│       └── Protect the brain or allow cranial growth in children
│
├── 8. FIXATION AND BONE-GAP MANAGEMENT
│   ├── Internal fixation
│   │   ├── Plates and screws
│   │   ├── Locking plates
│   │   ├── Compression screws
│   │   ├── Intramedullary nails
│   │   └── Staples in selected small-bone procedures
│   ├── External fixation
│   │   ├── Circular Ilizarov-type frame
│   │   ├── Hexapod frame
│   │   └── Monolateral frame
│   ├── Bone graft or substitute
│   │   ├── Autograft
│   │   ├── Allograft
│   │   └── Synthetic graft material
│   └── Choice depends on
│       ├── Bone location and quality
│       ├── Type and size of correction
│       ├── Need for lengthening
│       ├── Patient age and activity
│       └── Risk of nonunion
│
├── 9. HEALING AND REHABILITATION
│   ├── Healing stages
│   │   ├── Inflammation
│   │   ├── Soft callus formation
│   │   ├── Hard callus/mineralization
│   │   └── Remodeling
│   ├── Rehabilitation
│   │   ├── Pain and swelling control
│   │   ├── Protection of the osteotomy
│   │   ├── Weight-bearing restrictions or progression as prescribed
│   │   ├── Range-of-motion exercises
│   │   ├── Muscle strengthening
│   │   └── Gait retraining and return-to-sport/work planning
│   └── Follow-up
│       ├── Serial clinical assessment
│       └── Radiographs to check correction, fixation, and union
│
└── 10. COMPLICATIONS
    ├── General surgical
    │   ├── Anesthesia-related events
    │   ├── Bleeding or hematoma
    │   ├── Infection
    │   ├── Deep-vein thrombosis or pulmonary embolism
    │   └── Wound-healing problems
    ├── Bone-related
    │   ├── Delayed union
    │   ├── Nonunion
    │   ├── Malunion
    │   ├── Loss of correction
    │   ├── Hinge fracture in opening-wedge procedures
    │   └── Bone graft failure or collapse
    ├── Implant-related
    │   ├── Plate/screw irritation
    │   ├── Screw loosening
    │   ├── Plate breakage
    │   └── Need for later implant removal
    ├── Neurovascular
    │   ├── Nerve injury
    │   ├── Vessel injury
    │   └── Compartment syndrome, particularly in limb procedures
    └── Functional
        ├── Stiffness
        ├── Persistent pain
        ├── Under-correction or over-correction
        ├── Adjacent-joint overload
        └── Progression of underlying arthritis

Except 5 th one , remaining all

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mkdir -p "/tmp/workspace/osteotomy-study-guide/src" "/tmp/workspace/osteotomy-study-guide/output" && python - <<'PY' from reportlab.lib import colors from reportlab.lib.enums import TA_CENTER from reportlab.lib.pagesizes import A4 from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle from reportlab.lib.units import cm from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, PageBreak, Table, TableStyle, KeepTogether from reportlab.pdfbase.ttfonts import TTFont from reportlab.pdfbase import pdfmetrics from reportlab.lib.colors import HexColor from reportlab.pdfbase.pdfmetrics import stringWidth from reportlab.pdfgen import canvas from reportlab.platypus.flowables import HRFlowable out='/tmp/workspace/osteotomy-study-guide/output/Osteotomy_Study_Guide.pdf' navy=HexColor('#183A5A'); teal=HexColor('#087E8B'); pale=HexColor('#EAF3F6'); ink=HexColor('#18242D'); muted=HexColor('#56636F'); orange=HexColor('#C65A1E') styles=getSampleStyleSheet() styles.add(ParagraphStyle(name='CoverTitle', parent=styles['Title'], fontName='Helvetica-Bold', fontSize=29, leading=34, textColor=navy, alignment=TA_CENTER, spaceAfter=12)) styles.add(ParagraphStyle(name='CoverSub', parent=styles['Normal'], fontSize=13, leading=19, textColor=muted, alignment=TA_CENTER)) styles.add(ParagraphStyle(name='H1x', parent=styles['Heading1'], fontName='Helvetica-Bold', fontSize=18, leading=22, textColor=navy, spaceBefore=8, spaceAfter=9, keepWithNext=True)) styles.add(ParagraphStyle(name='H2x', parent=styles['Heading2'], fontName='Helvetica-Bold', fontSize=12.5, leading=16, textColor=teal, spaceBefore=10, spaceAfter=5, keepWithNext=True)) styles.add(ParagraphStyle(name='Bodyx', parent=styles['BodyText'], fontName='Helvetica', fontSize=9.4, leading=13.1, textColor=ink, spaceAfter=5)) styles.add(ParagraphStyle(name='Smallx', parent=styles['BodyText'], fontName='Helvetica', fontSize=8.2, leading=11, textColor=muted, spaceAfter=3)) styles.add(ParagraphStyle(name='Bulletx', parent=styles['BodyText'], fontName='Helvetica', fontSize=9.1, leading=12.5, leftIndent=14, firstLineIndent=-9, textColor=ink, spaceAfter=2.5)) styles.add(ParagraphStyle(name='Callout', parent=styles['BodyText'], fontName='Helvetica-Bold', fontSize=9.2, leading=13, textColor=navy, backColor=pale, borderColor=HexColor('#B8D5DD'), borderWidth=.5, borderPadding=7, spaceBefore=5, spaceAfter=7)) def P(t, style='Bodyx'): return Paragraph(t,styles[style]) def bullets(items): return [P('• '+x,'Bulletx') for x in items] def tbl(rows, widths=None): t=Table(rows,colWidths=widths, repeatRows=1, hAlign='LEFT') t.setStyle(TableStyle([('BACKGROUND',(0,0),(-1,0),navy),('TEXTCOLOR',(0,0),(-1,0),colors.white),('FONTNAME',(0,0),(-1,0),'Helvetica-Bold'),('FONTSIZE',(0,0),(-1,0),8.5),('LEADING',(0,0),(-1,0),11),('FONTNAME',(0,1),(-1,-1),'Helvetica'),('FONTSIZE',(0,1),(-1,-1),8.2),('LEADING',(0,1),(-1,-1),11),('TEXTCOLOR',(0,1),(-1,-1),ink),('BACKGROUND',(0,1),(-1,-1),colors.white),('ROWBACKGROUNDS',(0,1),(-1,-1),[colors.white,HexColor('#F6F9FA')]),('GRID',(0,0),(-1,-1),.35,HexColor('#C8D4D9')),('VALIGN',(0,0),(-1,-1),'TOP'),('LEFTPADDING',(0,0),(-1,-1),5),('RIGHTPADDING',(0,0),(-1,-1),5),('TOPPADDING',(0,0),(-1,-1),4),('BOTTOMPADDING',(0,0),(-1,-1),4)])) return t class NumberedCanvas(canvas.Canvas): def __init__(self,*a,**kw): canvas.Canvas.__init__(self,*a,**kw); self.pages=[] def showPage(self): self.pages.append(dict(self.__dict__)); self._startPage() def save(self): n=len(self.pages) for state in self.pages: self.__dict__.update(state); self.setStrokeColor(HexColor('#C8D4D9')); self.line(1.7*cm,1.45*cm,19.3*cm,1.45*cm) self.setFont('Helvetica',8); self.setFillColor(muted); self.drawString(1.7*cm,1.0*cm,'Osteotomy Study Guide | Educational use') self.drawRightString(19.3*cm,1.0*cm,f'Page {self._pageNumber} of {n}'); canvas.Canvas.showPage(self) canvas.Canvas.save(self) doc=SimpleDocTemplate(out,pagesize=A4,rightMargin=1.65*cm,leftMargin=1.65*cm,topMargin=1.55*cm,bottomMargin=1.8*cm) story=[] story += [Spacer(1,2.7*cm),P('OSTEOTOMY','CoverTitle'),P('A structured study guide: fundamentals, lower limb, upper limb, spine, and rehabilitation','CoverSub'),Spacer(1,.7*cm),HRFlowable(width='55%', thickness=2, color=teal, hAlign='CENTER'),Spacer(1,.65*cm),P('Scope: Craniofacial and jaw osteotomies are intentionally excluded.', 'CoverSub'),Spacer(1,3.5*cm),P('This guide is for study and revision. Operative decisions, technique, implants, and postoperative restrictions require a trained surgical team and patient-specific planning.', 'Smallx'),PageBreak()] story += [P('Contents','H1x'),P('1. Fundamentals and preoperative planning 2. Osteotomy designs and biomechanics 3. Lower-limb osteotomies 4. Upper-limb osteotomies 5. Spinal osteotomies 6. Fixation, healing, rehabilitation, and complications 7. Rapid revision tables and self-check', 'Bodyx'),Spacer(1,8),P('1. Fundamentals and planning','H1x'),P('Definition. Osteotomy is a planned surgical division of bone followed by correction of its position and stabilization until union. It may alter alignment, rotation, length, translation, or joint loading.', 'Bodyx'),P('Core goals','H2x')] + bullets(['Correct coronal-plane deformity: varus or valgus.','Correct sagittal-plane deformity: flexion, extension, or joint slope.','Correct axial-plane deformity: abnormal internal or external torsion.','Restore length or correct shortening using acute correction or gradual distraction.','Redistribute load away from an arthritic or overloaded joint compartment.','Restore anatomy and function after a fracture malunion.']) story += [P('The deformity-correction framework','H2x'),P('Describe the deformity in all relevant planes. Identify the center of rotation of angulation (CORA), determine whether translation or rotation is present, and choose an osteotomy level that creates the intended mechanical effect without producing an unwanted secondary deformity.', 'Bodyx'),tbl([[P('Plane','Smallx'),P('Examples','Smallx'),P('Typical assessment','Smallx')],[P('Coronal','Smallx'),P('Varus, valgus','Smallx'),P('Standing AP long-leg radiograph; mechanical axis','Smallx')],[P('Sagittal','Smallx'),P('Flexion/recurvatum, tibial slope','Smallx'),P('Lateral radiograph; joint-specific angles','Smallx')],[P('Axial','Smallx'),P('Femoral anteversion, tibial torsion','Smallx'),P('Clinical rotational profile; CT when needed','Smallx')],[P('Length/translation','Smallx'),P('Limb discrepancy, offset','Smallx'),P('Scanogram or calibrated long-leg imaging','Smallx')]], [3*cm,5.2*cm,8.2*cm]),P('Preoperative essentials','H2x')] + bullets(['History: pain location, activity demands, gait, instability, prior surgery, smoking, infection risk, and medical comorbidities.','Examination: alignment, limb length, rotational profile, joint motion, ligament stability, muscle balance, skin/soft tissues, and distal neurovascular status.','Imaging: properly positioned weight-bearing radiographs are fundamental for lower-limb load-transfer procedures. CT is useful for torsion and complex multiplanar deformity.','Planning: select correction magnitude, osteotomy geometry, fixation, graft requirement, and weight-bearing progression before surgery.']) story += [P('Key point','Callout'),P('For knee osteotomy, the indication is not simply an abnormal X-ray. Symptoms, compartment-specific disease, alignment, joint motion, ligament status, and patient goals should agree with one another.', 'Bodyx'),PageBreak()] story += [P('2. Osteotomy designs and biomechanics','H1x'),tbl([[P('Type','Smallx'),P('Concept','Smallx'),P('Advantages / limitations','Smallx'),P('Typical examples','Smallx')],[P('Opening wedge','Smallx'),P('Cortex is opened to create a gap and angular correction. A hinge is preserved.','Smallx'),P('Preserves or lengthens bone; correction can be titrated. May need graft/support and has hinge-fracture or delayed-union risk.','Smallx'),P('Medial opening-wedge HTO; medial cuneiform; distal femur.','Smallx')],[P('Closing wedge','Smallx'),P('A bone wedge is removed and the remaining cortices are apposed.','Smallx'),P('Direct bony contact and early stability; shortens the bone and requires accurate two-cut geometry.','Smallx'),P('Lateral closing-wedge HTO; Dwyer calcaneal osteotomy.','Smallx')],[P('Dome','Smallx'),P('Curved cut permits angular correction around a central arc.','Smallx'),P('Potentially broad contact and stable geometry; technically demanding.','Smallx'),P('Complex tibial deformity correction.','Smallx')],[P('Transverse / oblique','Smallx'),P('Straight or diagonal division. Segments can rotate, translate, shorten, or lengthen.','Smallx'),P('Useful for derotation. Oblique cut increases contact but can shear without stable fixation.','Smallx'),P('Femoral or tibial derotation; malunion correction.','Smallx')],[P('Chevron / step-cut','Smallx'),P('V-shaped or interlocking cut.','Smallx'),P('Inherent rotational stability and larger contact surface in selected sites.','Smallx'),P('First metatarsal chevron; selected small-bone corrections.','Smallx')],[P('Distraction','Smallx'),P('Osteotomy followed by gradual separation to induce regenerate bone.','Smallx'),P('Allows lengthening and gradual multiplanar correction; prolonged treatment and pin/device issues.','Smallx'),P('External fixation or motorized lengthening nail.','Smallx')]], [2.7*cm,4.25*cm,6.25*cm,4.1*cm]),P('Opening versus closing wedge','H2x'),P('The choice is location- and patient-specific, not universally “better.” In proximal tibial osteotomy, opening wedge can allow easier exposure and fine adjustment, while closing wedge provides bone apposition but removes bone. Campbell reports no clear overall superiority in clinical outcome or alignment between the approaches in one randomized comparison. Campbell’s Operative Orthopaedics, 15th ed., p. 605.', 'Bodyx'),P('Fixation principles','H2x')] + bullets(['Stable fixation protects correction while allowing biologic union. Options include plates and screws, compression screws, intramedullary nails, staples in selected small-bone cases, or external fixation.','Graft or a structural spacer may be used where an opening wedge creates a significant defect.','Soft-tissue protection is part of fixation strategy: avoid vascular injury, nerve traction, tendon irritation, and unnecessary periosteal stripping.']) story += [PageBreak()] story += [P('3. Lower-limb osteotomies','H1x'),P('A. Hip and pelvis','H2x'),P('Hip-preserving osteotomies may improve femoral-head containment, acetabular coverage, or proximal femoral alignment. They are selected according to age, hip congruence, cartilage condition, dysplasia pattern, femoral version, and the ability to obtain a stable, concentrically reduced hip.', 'Bodyx'),tbl([[P('Procedure','Smallx'),P('Where performed','Smallx'),P('Main purpose','Smallx')],[P('Femoral varus/valgus osteotomy','Smallx'),P('Proximal femur, below/around the trochanteric region','Smallx'),P('Changes neck-shaft relationship and load/containment in selected hip disorders.','Smallx')],[P('Femoral derotational osteotomy','Smallx'),P('Proximal or distal femur','Smallx'),P('Corrects excessive anteversion or retroversion.','Smallx')],[P('Periacetabular osteotomy (PAO)','Smallx'),P('Around acetabulum, with pelvic cuts preserving the posterior column','Smallx'),P('Reorients acetabulum in symptomatic hip dysplasia with preserved joint.','Smallx')],[P('Salter innominate osteotomy','Smallx'),P('Ilium, with pubic symphysis as hinge','Smallx'),P('Pediatric acetabular reorientation after reduction or with reducible hip.','Smallx')],[P('Pemberton/Dega acetabuloplasty','Smallx'),P('Ilium above acetabulum','Smallx'),P('Changes acetabular roof direction and coverage in children.','Smallx')],[P('Triple innominate / Ganz-type acetabular osteotomy','Smallx'),P('Pelvis around acetabulum','Smallx'),P('Frees acetabulum for larger reorientation.','Smallx')]], [4*cm,5.3*cm,8*cm]),P('Study note','Callout'),P('Pediatric pelvic procedures vary with skeletal maturity. Campbell describes Salter, Pemberton, Steel triple innominate, Ganz acetabular, shelf, and Chiari procedures as options to increase hip stability and coverage in developmental dysplasia/dislocation. Campbell’s Operative Orthopaedics, 15th ed., p. 1173.', 'Bodyx'),P('B. Knee: proximal tibia and distal femur','H2x'),P('High tibial osteotomy (HTO). Usually performed in the proximal tibia to correct varus alignment and reduce medial-compartment loading in appropriately selected patients. The common variants are medial opening-wedge and lateral closing-wedge HTO. A dome osteotomy is a less common alternative.', 'Bodyx'),P('Distal femoral osteotomy (DFO). Performed just above the knee, commonly to correct valgus alignment and unload the lateral compartment. It may be opening-wedge or closing-wedge, medial or lateral, based on deformity origin and planned correction.', 'Bodyx'),P('Tibial tubercle osteotomy. The tibial tubercle, carrying the patellar tendon insertion, is repositioned for selected patellofemoral maltracking, instability, or focal overload patterns.', 'Bodyx'),P('Slope-altering proximal tibial osteotomy. Selected specialist procedure for abnormal tibial slope, including carefully chosen revision ACL situations.', 'Bodyx')] story += [P('HTO selection: simplified study checklist','H2x')] + bullets(['Symptoms and imaging indicate disease mainly in one compartment, with matching varus or valgus malalignment.','Adequate range of motion and capacity to adhere to rehabilitation are needed.','Important exclusions can include advanced opposite-compartment disease, major subluxation, severe loss of motion, inflammatory arthritis, or substantial vascular disease.','A correction should be planned from full-length standing imaging, considering mechanical axis and joint-line orientation.']) story += [P('The preceding principles align with Campbell’s listed indications and contraindications for proximal tibial osteotomy in osteoarthritic knees. Campbell’s Operative Orthopaedics, 15th ed., p. 605.', 'Smallx'),PageBreak()] story += [P('3. Lower-limb osteotomies continued','H1x'),P('C. Leg, ankle, hindfoot, and forefoot','H2x'),tbl([[P('Procedure','Smallx'),P('Where performed','Smallx'),P('Typical mechanical aim','Smallx')],[P('Supramalleolar tibial osteotomy','Smallx'),P('Distal tibia near ankle','Smallx'),P('Corrects distal tibial varus or valgus and redistributes ankle loading.','Smallx')],[P('Fibular osteotomy','Smallx'),P('Fibula, usually as adjunct','Smallx'),P('Facilitates tibial/ankle realignment in selected corrections.','Smallx')],[P('Medializing calcaneal slide','Smallx'),P('Posterior calcaneal tuberosity','Smallx'),P('Moves heel medially in selected planovalgus/flatfoot mechanics.','Smallx')],[P('Lateralizing calcaneal slide','Smallx'),P('Posterior calcaneal tuberosity','Smallx'),P('Moves heel laterally to correct hindfoot varus.','Smallx')],[P('Dwyer calcaneal osteotomy','Smallx'),P('Calcaneus, lateral closing wedge','Smallx'),P('Varus correction in cavovarus foot.','Smallx')],[P('Lateral-column lengthening','Smallx'),P('Anterior calcaneus','Smallx'),P('Lengthens lateral foot column in selected flexible flatfoot.','Smallx')],[P('First metatarsal chevron/scarf/proximal osteotomy','Smallx'),P('First metatarsal','Smallx'),P('Corrects components of hallux valgus.','Smallx')],[P('Akin osteotomy','Smallx'),P('Proximal phalanx of hallux','Smallx'),P('Corrects hallux phalangeal valgus component.','Smallx')],[P('Weil osteotomy','Smallx'),P('Lesser metatarsal neck','Smallx'),P('Shortens/rebalances selected lesser-metatarsal overload.','Smallx')]], [4.2*cm,5.0*cm,8.1*cm]),P('Clinical reasoning in foot osteotomy','H2x'),P('Foot deformity is segmental. A cavovarus foot, for example, may require treatment of plantar-flexed first ray, hindfoot varus, tendon imbalance, and equinus rather than a single generic correction. Osteotomy selection follows flexibility, apex, arthritis, and muscle balance.', 'Bodyx'),P('D. Femoral and tibial deformity correction','H2x'),P('Diaphyseal or metaphyseal osteotomy may correct post-traumatic malunion, congenital deformity, metabolic bone disease, or neuromuscular deformity. Acute correction is often suitable for modest, well-tolerated deformity. Gradual correction with circular or hexapod external fixation is useful when deformity is severe, multiplanar, associated with shortening, or requires soft-tissue accommodation.', 'Bodyx'),P('Planning pearl','Callout'),P('Correction at the CORA avoids creating translation. When the chosen osteotomy site differs from the CORA, planned translation may be necessary to restore mechanical alignment.', 'Bodyx'),PageBreak()] story += [P('4. Upper-limb osteotomies','H1x'),P('Upper-limb osteotomy prioritizes motion, rotation, joint congruence, limb appearance, and pain relief rather than weight redistribution alone.', 'Bodyx'),P('A. Humerus','H2x')] + bullets(['Supracondylar humeral corrective osteotomy: performed in the distal humerus for cubitus varus or cubitus valgus after malunited childhood elbow fractures. Correction can address varus/valgus, extension, and rotation.','Proximal humeral osteotomy: used selectively for proximal humeral malunion or deformity, with careful consideration of shoulder motion and blood supply.']) story += [P('B. Radius and ulna','H2x'),P('Forearm malunion can disturb the radius-ulna relationship and reduce pronation-supination. Corrective radial, ulnar, or combined osteotomy aims to restore length, bow, rotation, and joint congruity at the distal radioulnar and radiocapitellar joints.', 'Bodyx'),tbl([[P('Pattern','Smallx'),P('Key correction target','Smallx'),P('Planning issue','Smallx')],[P('Radial osteotomy','Smallx'),P('Radius length, bow, angulation, rotation','Smallx'),P('Protect tendon compartments and distal radioulnar joint mechanics.','Smallx')],[P('Ulnar shortening osteotomy','Smallx'),P('Relative ulnar length','Smallx'),P('Used in selected ulnocarpal loading disorders.','Smallx')],[P('Ulnar lengthening/angulation osteotomy','Smallx'),P('Ulnar alignment/length','Smallx'),P('May address deformity or radiocapitellar relationship in selected cases.','Smallx')],[P('Combined forearm osteotomy','Smallx'),P('Global forearm alignment','Smallx'),P('3D CT planning can help complex multiplanar malunion.','Smallx')]], [4.5*cm,6*cm,6.8*cm]),P('C. Wrist and hand','H2x')] + bullets(['Distal radial corrective osteotomy: performed near a malunited distal radius fracture to improve radial inclination, tilt, length, and distal radioulnar joint congruity. It may be opening or closing wedge.','Metacarpal and phalangeal osteotomy: corrects angular or rotational malunion. Rotational deformity is especially functionally important because it can cause finger overlap during grasp.','First-ray procedures: include osteotomies in the metacarpal or phalanx for selected thumb deformities.']) story += [P('Advanced planning','H2x'),P('Complex forearm deformity can be difficult to understand on two-dimensional radiographs. Comparative CT and patient-specific 3D planning are sometimes used to quantify deformity and guide osteotomy planes. A recent systematic review found the evidence base for 2D- and 3D-guided forearm corrective osteotomy remains heterogeneous, so method choice should be individualized (PMID: 37747738).', 'Bodyx'),PageBreak()] story += [P('5. Spinal osteotomies','H1x'),P('Spinal osteotomies are high-complexity deformity operations. They are performed to correct rigid sagittal, coronal, or multiplanar imbalance when less extensive releases or instrumentation alone cannot provide enough correction.', 'Bodyx'),tbl([[P('Type','Smallx'),P('Where / what is removed','Smallx'),P('Main use and considerations','Smallx')],[P('Posterior-column osteotomy: Ponte / Smith-Petersen type','Smallx'),P('Posterior elements and posterior column at one or multiple levels.','Smallx'),P('Provides segmental correction when the anterior column/disc can open. Often used across several levels.','Smallx')],[P('Pedicle-subtraction osteotomy (PSO)','Smallx'),P('Posterior elements, pedicles, and a closing wedge of vertebral body.','Smallx'),P('Provides large focal sagittal correction in a rigid spine. Higher blood loss and neurologic risk than posterior-column work.','Smallx')],[P('Vertebral-column resection (VCR)','Smallx'),P('Part or all of one or more vertebrae and adjacent discs.','Smallx'),P('Greatest correction potential for severe rigid deformity; also the highest technical and neurologic risk.','Smallx')]], [4.2*cm,6.2*cm,6.9*cm]),P('Spinal-osteotomy safety themes','H2x')] + bullets(['Detailed global alignment assessment and full-length standing imaging.','Preoperative evaluation of bone quality, fusion status, cardiopulmonary reserve, nutrition, and infection risk.','Neuromonitoring, blood-loss planning, careful closure technique, and a contingency plan for neurologic change.','Recognition of complications: neurologic deficit, dural tear, blood loss, implant failure, pseudarthrosis, junctional problems, and infection.']) story += [P('Study distinction','Callout'),P('Posterior-column osteotomy works mainly through posterior shortening and anterior opening. PSO is a three-column closing wedge. VCR removes a vertebral segment and allows the broadest correction but has the greatest physiologic and neurologic demands.', 'Bodyx'),PageBreak()] story += [P('6. Fixation, healing, rehabilitation, and complications','H1x'),P('Fixation options','H2x'),tbl([[P('Method','Smallx'),P('Best suited to','Smallx'),P('Important consideration','Smallx')],[P('Plate and screws','Smallx'),P('Many periarticular opening/closing wedge osteotomies','Smallx'),P('Plate position and screw purchase must protect the correction and adjacent soft tissues.','Smallx')],[P('Compression screw(s)','Smallx'),P('Small bone and selected osteotomies','Smallx'),P('Provides compression but may be insufficient for unstable or multiplanar correction alone.','Smallx')],[P('Intramedullary nail','Smallx'),P('Diaphyseal correction, selected lengthening/correction constructs','Smallx'),P('Can be useful for load sharing and may support lengthening systems.','Smallx')],[P('External fixation','Smallx'),P('Gradual lengthening or complex multiplanar deformity','Smallx'),P('Permits adjustment but needs prolonged care and pin-site monitoring.','Smallx')]], [3.5*cm,6.1*cm,7.7*cm]),P('Biology of union','H2x'),P('Healing depends on blood supply, stability, contact/gap characteristics, infection control, nutrition, and patient factors such as smoking and metabolic disease. An osteotomy is followed radiographically until the intended correction and union are confirmed. The timetable varies widely by site, technique, fixation, and individual biology.', 'Bodyx'),P('Rehabilitation principles','H2x')] + bullets(['Weight-bearing status is procedure-specific. Do not apply one generic timetable to all osteotomies.','Early movement may be emphasized for nearby joints when fixation and soft tissues allow, while protecting the osteotomy.','Progression typically includes edema control, range of motion, muscle activation, gait retraining, progressive strengthening, and functional or sport-specific work.','Adherence to follow-up imaging and restrictions is part of protecting correction and union.']) story += [P('Complications','H2x'),tbl([[P('Category','Smallx'),P('Examples','Smallx'),P('Prevention / early response','Smallx')],[P('General','Smallx'),P('Bleeding, infection, wound problems, venous thromboembolism','Smallx'),P('Risk assessment, sterile technique, prophylaxis when indicated, early recognition.','Smallx')],[P('Bone/correction','Smallx'),P('Hinge fracture, delayed union, nonunion, malunion, under- or over-correction','Smallx'),P('Accurate planning, stable fixation, protect correction, monitor serial radiographs.','Smallx')],[P('Implant','Smallx'),P('Screw loosening, plate breakage, prominence/irritation','Smallx'),P('Appropriate construct and bone purchase; revise when required.','Smallx')],[P('Neurovascular','Smallx'),P('Nerve or vessel injury, compartment syndrome','Smallx'),P('Anatomic awareness, postoperative neurovascular checks, urgent action for suspected compartment syndrome.','Smallx')],[P('Functional','Smallx'),P('Stiffness, persistent pain, adjacent-joint overload, arthritis progression','Smallx'),P('Appropriate selection, rehabilitation, and reassessment of alternate diagnoses.','Smallx')]], [3.2*cm,6*cm,8.1*cm]),PageBreak()] story += [P('7. Rapid revision','H1x'),P('Where are the major osteotomies performed?','H2x'),tbl([[P('Region','Smallx'),P('Common sites','Smallx'),P('Classic purpose','Smallx')],[P('Hip/pelvis','Smallx'),P('Proximal femur, ilium, periacetabular pelvis','Smallx'),P('Containment, acetabular coverage, femoral version or alignment.','Smallx')],[P('Knee','Smallx'),P('Proximal tibia, distal femur, tibial tubercle','Smallx'),P('Compartment unloading, alignment, patellofemoral mechanics.','Smallx')],[P('Leg/ankle/foot','Smallx'),P('Tibia, fibula, calcaneus, cuneiform, metatarsals, phalanges','Smallx'),P('Hindfoot/forefoot alignment and ankle load redistribution.','Smallx')],[P('Upper limb','Smallx'),P('Distal humerus, radius, ulna, metacarpals, phalanges','Smallx'),P('Restore motion, rotation, length, and joint congruity.','Smallx')],[P('Spine','Smallx'),P('Posterior column, pedicles, vertebral body','Smallx'),P('Correct rigid spinal deformity.','Smallx')]], [3*cm,7.2*cm,7.1*cm]),P('Self-check questions','H2x')] + bullets(['1. Define osteotomy and list five broad objectives.','2. Contrast opening-wedge and closing-wedge osteotomy in terms of geometry, limb length, and healing considerations.','3. Where are HTO and DFO performed, and which alignment pattern commonly leads to each?','4. Name three pelvic osteotomy families and their general role in hip dysplasia.','5. Why is rotational correction particularly important in the forearm and hand?','6. Compare posterior-column osteotomy, PSO, and VCR.','7. List four factors that influence osteotomy union.','8. List five complications requiring postoperative surveillance.']) story += [P('References and further reading','H2x'),P('• Campbell’s Operative Orthopaedics, 15th ed. Sections on proximal tibial osteotomy, distal femoral osteotomy, and pelvic osteotomy, including pp. 605 and 1173. • American Academy of Orthopaedic Surgeons. Osteotomy of the Knee. https://orthoinfo.aaos.org/en/treatment/osteotomy-of-the-knee • Meesters AML, et al. Functional outcome of 2-D- and 3-D-guided corrective forearm osteotomies: a systematic review. PMID: 37747738. • Chua CXK, et al. 3-dimensional printing in paediatric deformity osteotomy correction: systematic review and meta-analysis. PMID: 39998989.', 'Smallx'),P('Reminder: This is an educational summary, not a procedural manual or patient-specific medical advice.', 'Callout')] doc.build(story,canvasmaker=NumberedCanvas) print(out) PY python - <<'PY' from pypdf import PdfReader p='/tmp/workspace/osteotomy-study-guide/output/Osteotomy_Study_Guide.pdf' r=PdfReader(p) print('pages',len(r.pages),'size',__import__('os').path.getsize(p)) print(r.pages[0].extract_text()[:180]) PY

Created the PDF study guide covering all requested sections except craniofacial and jaw osteotomies. It includes fundamentals, osteotomy designs, lower limb, upper limb, spinal osteotomies, fixation, healing, rehabilitation, complications, tables, and revision questions.

Osteotomy Study Guide

PDF Document · PDF

OSTEOTOMY │ ├── 1. BASICS │ ├── Definition │ │ └── A planned surgical division and repositioning of bone. │ ├── Main aims │ │ ├── Correct angular deformity │ │ ├── Correct rotational deformity │ │ ├── Correct limb-length discrepancy │ │ ├── Redistribute load across a joint │ │ ├── Improve joint congruence or stability │ │ └── Correct malunion after fracture │ ├── Main settings │ │ ├── Congenital deformity │ │ ├── Developmental deformity │ │ ├── Post-traumatic malunion │ │ ├── Degenerative joint disease with malalignment │ │ ├── Neuromuscular disease │ │ └── Tumor reconstruction or salvage surgery │ └── Principle │ └── Bone is cut at a planned site, repositioned, and held until union. │ ├── 2. PREOPERATIVE ASSESSMENT AND PLANNING │ ├── Clinical assessment │ │ ├── Pain, gait, instability, function │ │ ├── Range of motion and joint status │ │ ├── Limb length │ │ ├── Rotation profile │ │ └── Neurovascular and soft-tissue examination │ ├── Imaging │ │ ├── Standing long-leg radiographs │ │ ├── AP and lateral radiographs │ │ ├── CT for torsion and complex deformity │ │ ├── MRI for cartilage, meniscus, ligament, or osteonecrosis │ │ └── 3-dimensional imaging/planning in selected complex cases │ ├── Deformity analysis │ │ ├── Coronal plane: varus or valgus │ │ ├── Sagittal plane: flexion, extension, slope │ │ ├── Axial plane: internal or external rotation │ │ ├── Translation │ │ └── Length discrepancy │ └── Planning questions │ ├── What is the deformity? │ ├── Where is its apex? │ ├── At which bone level should correction occur? │ ├── How many degrees or millimetres are required? │ └── Which fixation and rehabilitation plan is suitable? │ ├── 3. TYPES OF OSTEOTOMY BY BONE-CUT DESIGN │ │ │ ├── A. Closing-wedge osteotomy │ │ ├── A bone wedge is removed. │ │ ├── Remaining bone surfaces are closed together. │ │ ├── Advantages: direct bone contact and often stable fixation. │ │ ├── Limitations: shortens bone and requires wedge removal. │ │ └── Examples: lateral closing-wedge high tibial osteotomy, │ │ distal femoral osteotomy, calcaneal Dwyer osteotomy. │ │ │ ├── B. Opening-wedge osteotomy │ │ ├── Bone is cut and the gap is opened to create correction. │ │ ├── The gap may be supported with graft or a spacer. │ │ ├── Advantages: preserves length and allows gradual adjustment. │ │ ├── Limitations: hinge fracture, delayed union, implant stress. │ │ └── Example: medial opening-wedge high tibial osteotomy. │ │ │ ├── C. Dome osteotomy │ │ ├── Curved cut allowing correction around a central axis. │ │ ├── Can correct large angular deformity with little shortening. │ │ └── Often used in complex deformity correction. │ │ │ ├── D. Transverse osteotomy │ │ ├── Straight cut across the bone. │ │ ├── Useful for rotation, translation, shortening, or lengthening. │ │ └── Common in derotational femoral or tibial osteotomy. │ │ │ ├── E. Oblique osteotomy │ │ ├── Diagonal bone cut. │ │ ├── Creates a broad contact area. │ │ └── Used where angular and translational correction is needed. │ │ │ ├── F. Chevron osteotomy │ │ ├── V-shaped cut. │ │ ├── Provides inherent bony stability. │ │ └── Common in first metatarsal surgery for hallux valgus. │ │ │ ├── G. Step-cut osteotomy │ │ ├── Interlocking stepped cut. │ │ ├── Good rotational stability and surface contact. │ │ └── Used in selected rotational corrections. │ │ │ ├── H. Rotational/derotational osteotomy │ │ ├── Bone segments are rotated around the long axis. │ │ └── Used for excessive femoral anteversion, retroversion, │ │ internal tibial torsion, or external tibial torsion. │ │ │ ├── I. Distraction osteotomy │ │ ├── Bone is divided and gradually distracted with an external │ │ │ fixator or lengthening nail. │ │ ├── New bone forms in the slowly enlarging gap. │ │ └── Used for limb lengthening and severe multiplanar deformity. │ │ │ └── J. Intra-articular osteotomy │ ├── Performed close to or through the joint surface. │ ├── Restores joint congruity after an intra-articular malunion. │ └── Requires precise planning because cartilage and joint │ stability may be affected. │ ├── 4. LOWER-LIMB OSTEOTOMIES │ │ │ ├── A. Hip and pelvis │ │ ├── Femoral varus osteotomy │ │ │ └── May improve femoral head containment in selected children. │ │ ├── Femoral valgus osteotomy │ │ │ └── Used in selected proximal femoral deformities and nonunion. │ │ ├── Femoral derotational osteotomy │ │ │ └── Corrects abnormal femoral version/torsion. │ │ ├── Periacetabular osteotomy (PAO) │ │ │ └── Reorients the acetabulum in symptomatic hip dysplasia │ │ │ with a sufficiently preserved joint. │ │ ├── Salter innominate osteotomy │ │ │ └── Pediatric pelvic procedure for acetabular reorientation. │ │ ├── Pemberton acetabuloplasty │ │ ├── Dega acetabuloplasty │ │ ├── Chiari pelvic osteotomy │ │ └── Shelf acetabuloplasty │ │ │ ├── B. Knee: tibia and femur │ │ ├── High tibial osteotomy (HTO) │ │ │ ├── Usually performed at the proximal tibia. │ │ │ ├── Corrects varus alignment in selected patients with │ │ │ │ medial-compartment knee osteoarthritis. │ │ │ ├── Medial opening-wedge HTO │ │ │ └── Lateral closing-wedge HTO │ │ ├── Distal femoral osteotomy (DFO) │ │ │ ├── Performed above the knee. │ │ │ └── Usually corrects valgus alignment and unloads the │ │ │ lateral knee compartment. │ │ ├── Tibial tubercle osteotomy │ │ │ ├── Moves the patellar tendon attachment. │ │ │ └── Used in selected patellofemoral instability or overload. │ │ └── Tibial slope-changing osteotomy │ │ └── Selected cases of recurrent ACL graft failure with │ │ excessive posterior tibial slope. │ │ │ ├── C. Leg, ankle, and hindfoot │ │ ├── Supramalleolar tibial osteotomy │ │ │ └── Corrects distal tibial varus or valgus near the ankle. │ │ ├── Fibular osteotomy │ │ │ └── May accompany tibial correction to permit realignment. │ │ ├── Calcaneal lateralizing slide osteotomy │ │ │ └── Shifts the heel laterally for hindfoot varus correction. │ │ ├── Calcaneal medializing slide osteotomy │ │ │ └── Shifts the heel medially in selected flatfoot deformity. │ │ ├── Dwyer calcaneal osteotomy │ │ │ └── Lateral closing-wedge correction for cavovarus hindfoot. │ │ └── Anterior calcaneal lengthening osteotomy │ │ └── Lengthens lateral column in selected flexible flatfoot. │ │ │ └── D. Forefoot and toes │ ├── Distal first-metatarsal chevron osteotomy │ ├── Scarf osteotomy of the first metatarsal │ ├── Proximal first-metatarsal osteotomy │ ├── Akin osteotomy of the proximal phalanx │ ├── Weil lesser-metatarsal osteotomy │ ├── Closing-wedge or opening-wedge metatarsal osteotomy │ └── Cuneiform/cuboid osteotomies for selected fixed foot deformities │ ├── 5. UPPER-LIMB OSTEOTOMIES │ │ │ ├── A. Humerus │ │ ├── Supracondylar humeral osteotomy │ │ │ └── Corrects cubitus varus or cubitus valgus after childhood │ │ │ elbow fracture malunion. │ │ └── Proximal humeral osteotomy │ │ └── Selected deformity, malunion, or reconstruction cases. │ │ │ ├── B. Forearm │ │ ├── Radial osteotomy │ │ ├── Ulnar osteotomy │ │ ├── Combined radius-ulna osteotomy │ │ └── Corrective osteotomy for malunited forearm fractures or │ │ congenital deformities. │ │ │ ├── C. Wrist │ │ ├── Radial shortening osteotomy │ │ │ └── May unload the ulnocarpal joint in ulnar impaction. │ │ ├── Ulnar shortening osteotomy │ │ ├── Radial opening-wedge osteotomy │ │ │ └── Used for selected distal radius malunions. │ │ └── Closing-wedge radial osteotomy │ │ │ └── D. Hand │ ├── Metacarpal osteotomy │ ├── Phalangeal osteotomy │ └── Used for angular, rotational, or length-related deformity. │ ├── 6. SPINAL OSTEOTOMIES │ │ │ ├── Purpose │ │ └── Correct rigid sagittal, coronal, or multiplanar spinal deformity. │ ├── Ponte or Smith-Petersen osteotomy │ │ ├── Posterior-column shortening osteotomy. │ │ ├── Requires a mobile anterior disc space. │ │ └── Often used for moderate correction across several levels. │ ├── Pedicle-subtraction osteotomy (PSO) │ │ ├── Wedge of posterior elements and vertebral body is removed. │ │ ├── Produces substantial correction at one level. │ │ └── Used for rigid sagittal imbalance in selected cases. │ ├── Vertebral-column resection (VCR) │ │ ├── Removal of part or all of one or more vertebrae. │ │ ├── Provides the greatest correction. │ │ └── Reserved for severe, rigid deformity because risk is high. │ └── Risks │ ├── Neurological injury │ ├── Major blood loss │ ├── Dural tear │ ├── Nonunion │ └── Implant failure │ ├── 7. CRANIOFACIAL AND JAW OSTEOTOMIES │ │ │ ├── A. Maxilla │ │ ├── Le Fort I osteotomy │ │ │ └── Repositions the upper jaw in three dimensions. │ │ ├── Le Fort II osteotomy │ │ └── Le Fort III osteotomy │ │ └── Used in more extensive midfacial deformity correction. │ ├── B. Mandible │ │ ├── Bilateral sagittal split osteotomy (BSSO) │ │ │ └── Advances, sets back, or rotates the lower jaw. │ │ ├── Vertical ramus osteotomy │ │ ├── Genioplasty │ │ │ └── Repositions the chin. │ │ └── Segmental mandibular osteotomy │ ├── C. Cranial vault │ │ ├── Fronto-orbital advancement │ │ ├── Cranial vault remodeling │ │ └── Used in selected craniosynostosis and craniofacial disorders. │ └── Main goals │ ├── Correct malocclusion │ ├── Improve facial skeletal balance │ ├── Improve airway in selected cases │ └── Protect the brain or allow cranial growth in children │ ├── 8. FIXATION AND BONE-GAP MANAGEMENT │ ├── Internal fixation │ │ ├── Plates and screws │ │ ├── Locking plates │ │ ├── Compression screws │ │ ├── Intramedullary nails │ │ └── Staples in selected small-bone procedures │ ├── External fixation │ │ ├── Circular Ilizarov-type frame │ │ ├── Hexapod frame │ │ └── Monolateral frame │ ├── Bone graft or substitute │ │ ├── Autograft │ │ ├── Allograft │ │ └── Synthetic graft material │ └── Choice depends on │ ├── Bone location and quality │ ├── Type and size of correction │ ├── Need for lengthening │ ├── Patient age and activity │ └── Risk of nonunion │ ├── 9. HEALING AND REHABILITATION │ ├── Healing stages │ │ ├── Inflammation │ │ ├── Soft callus formation │ │ ├── Hard callus/mineralization │ │ └── Remodeling │ ├── Rehabilitation │ │ ├── Pain and swelling control │ │ ├── Protection of the osteotomy │ │ ├── Weight-bearing restrictions or progression as prescribed │ │ ├── Range-of-motion exercises │ │ ├── Muscle strengthening │ │ └── Gait retraining and return-to-sport/work planning │ └── Follow-up │ ├── Serial clinical assessment │ └── Radiographs to check correction, fixation, and union │ └── 10. COMPLICATIONS ├── General surgical │ ├── Anesthesia-related events │ ├── Bleeding or hematoma │ ├── Infection │ ├── Deep-vein thrombosis or pulmonary embolism │ └── Wound-healing problems ├── Bone-related │ ├── Delayed union │ ├── Nonunion │ ├── Malunion │ ├── Loss of correction │ ├── Hinge fracture in opening-wedge procedures │ └── Bone graft failure or collapse ├── Implant-related │ ├── Plate/screw irritation │ ├── Screw loosening │ ├── Plate breakage │ └── Need for later implant removal ├── Neurovascular │ ├── Nerve injury │ ├── Vessel injury │ └── Compartment syndrome, particularly in limb procedures └── Functional ├── Stiffness ├── Persistent pain ├── Under-correction or over-correction ├── Adjacent-joint overload └── Progression of underlying arthritis

Reading File

This is a broad osteotomy syllabus. Here is the study map:

Basics, indications, and principles
Preoperative assessment, imaging, and deformity planning
Bone-cut designs: opening wedge, closing wedge, dome, rotational, distraction, and others
Lower-limb osteotomies: hip, pelvis, knee, leg, ankle, foot, and toes
Upper-limb osteotomies: humerus, forearm, wrist, and hand
Spinal osteotomies: Ponte/Smith-Petersen, pedicle-subtraction, and vertebral-column resection
Craniofacial and jaw osteotomies
Fixation methods, grafting, and external fixation
Bone healing, follow-up, and rehabilitation
Complications, prevention, and management

At a high level, osteotomy is a planned bone cut that changes alignment, rotation, length, or loading. Its success relies on identifying the deformity in three dimensions, selecting the appropriate correction level and cut geometry, then maintaining the correction with stable fixation until union.

The procedures vary substantially by anatomical region. Lower-limb osteotomies often redistribute load across a joint, while upper-limb procedures restore motion and rotational alignment. Spinal and craniofacial osteotomies are specialist procedures with distinct planning and risk profiles.

Asking for Preferences

Which topic should I explain in detail next?

Topic map

Core principles
- Definition, objectives, preoperative planning, imaging, fixation, bone healing, rehabilitation
Classification by bone-cut pattern
- Opening-wedge, closing-wedge, dome, transverse, oblique, chevron, rotational, step-cut, and distraction osteotomy
Lower-limb osteotomies
- Femur, tibia, fibula, pelvis, hip, knee, ankle, foot, and toes
Upper-limb osteotomies
- Humerus, radius, ulna, wrist, and hand
Spinal osteotomies
- Smith-Petersen/Ponte, pedicle-subtraction, vertebral-column resection
Craniofacial and jaw osteotomies
- Le Fort, sagittal split mandibular, genioplasty, and cranial vault procedures
Technique and fixation
- Plates, screws, intramedullary devices, external fixators, bone grafts, and computer-assisted planning
Complications and outcomes
- Neurovascular injury, infection, nonunion, malunion, loss of correction, compartment syndrome, thrombosis, hardware problems, and adjacent-joint effects.

High-level overview

Which section should I explain in full first?

General principles and all cut types
Hip and pelvic osteotomies
Knee, femur, and tibial osteotomies
Foot and ankle osteotomies
Spine osteotomies
Jaw and facial osteotomies# Osteotomy: Structured Study Map

OSTEOTOMY
│
├── 1. BASICS
│   ├── Definition
│   │   └── A planned surgical division and repositioning of bone.
│   ├── Main aims
│   │   ├── Correct angular deformity
│   │   ├── Correct rotational deformity
│   │   ├── Correct limb-length discrepancy
│   │   ├── Redistribute load across a joint
│   │   ├── Improve joint congruence or stability
│   │   └── Correct malunion after fracture
│   ├── Main settings
│   │   ├── Congenital deformity
│   │   ├── Developmental deformity
│   │   ├── Post-traumatic malunion
│   │   ├── Degenerative joint disease with malalignment
│   │   ├── Neuromuscular disease
│   │   └── Tumor reconstruction or salvage surgery
│   └── Principle
│       └── Bone is cut at a planned site, repositioned, and held until union.
│
├── 2. PREOPERATIVE ASSESSMENT AND PLANNING
│   ├── Clinical assessment
│   │   ├── Pain, gait, instability, function
│   │   ├── Range of motion and joint status
│   │   ├── Limb length
│   │   ├── Rotation profile
│   │   └── Neurovascular and soft-tissue examination
│   ├── Imaging
│   │   ├── Standing long-leg radiographs
│   │   ├── AP and lateral radiographs
│   │   ├── CT for torsion and complex deformity
│   │   ├── MRI for cartilage, meniscus, ligament, or osteonecrosis
│   │   └── 3-dimensional imaging/planning in selected complex cases
│   ├── Deformity analysis
│   │   ├── Coronal plane: varus or valgus
│   │   ├── Sagittal plane: flexion, extension, slope
│   │   ├── Axial plane: internal or external rotation
│   │   ├── Translation
│   │   └── Length discrepancy
│   └── Planning questions
│       ├── What is the deformity?
│       ├── Where is its apex?
│       ├── At which bone level should correction occur?
│       ├── How many degrees or millimetres are required?
│       └── Which fixation and rehabilitation plan is suitable?
│
├── 3. TYPES OF OSTEOTOMY BY BONE-CUT DESIGN
│   │
│   ├── A. Closing-wedge osteotomy
│   │   ├── A bone wedge is removed.
│   │   ├── Remaining bone surfaces are closed together.
│   │   ├── Advantages: direct bone contact and often stable fixation.
│   │   ├── Limitations: shortens bone and requires wedge removal.
│   │   └── Examples: lateral closing-wedge high tibial osteotomy,
│   │       distal femoral osteotomy, calcaneal Dwyer osteotomy.
│   │
│   ├── B. Opening-wedge osteotomy
│   │   ├── Bone is cut and the gap is opened to create correction.
│   │   ├── The gap may be supported with graft or a spacer.
│   │   ├── Advantages: preserves length and allows gradual adjustment.
│   │   ├── Limitations: hinge fracture, delayed union, implant stress.
│   │   └── Example: medial opening-wedge high tibial osteotomy.
│   │
│   ├── C. Dome osteotomy
│   │   ├── Curved cut allowing correction around a central axis.
│   │   ├── Can correct large angular deformity with little shortening.
│   │   └── Often used in complex deformity correction.
│   │
│   ├── D. Transverse osteotomy
│   │   ├── Straight cut across the bone.
│   │   ├── Useful for rotation, translation, shortening, or lengthening.
│   │   └── Common in derotational femoral or tibial osteotomy.
│   │
│   ├── E. Oblique osteotomy
│   │   ├── Diagonal bone cut.
│   │   ├── Creates a broad contact area.
│   │   └── Used where angular and translational correction is needed.
│   │
│   ├── F. Chevron osteotomy
│   │   ├── V-shaped cut.
│   │   ├── Provides inherent bony stability.
│   │   └── Common in first metatarsal surgery for hallux valgus.
│   │
│   ├── G. Step-cut osteotomy
│   │   ├── Interlocking stepped cut.
│   │   ├── Good rotational stability and surface contact.
│   │   └── Used in selected rotational corrections.
│   │
│   ├── H. Rotational/derotational osteotomy
│   │   ├── Bone segments are rotated around the long axis.
│   │   └── Used for excessive femoral anteversion, retroversion,
│   │       internal tibial torsion, or external tibial torsion.
│   │
│   ├── I. Distraction osteotomy
│   │   ├── Bone is divided and gradually distracted with an external
│   │   │   fixator or lengthening nail.
│   │   ├── New bone forms in the slowly enlarging gap.
│   │   └── Used for limb lengthening and severe multiplanar deformity.
│   │
│   └── J. Intra-articular osteotomy
│       ├── Performed close to or through the joint surface.
│       ├── Restores joint congruity after an intra-articular malunion.
│       └── Requires precise planning because cartilage and joint
│           stability may be affected.
│
├── 4. LOWER-LIMB OSTEOTOMIES
│   │
│   ├── A. Hip and pelvis
│   │   ├── Femoral varus osteotomy
│   │   │   └── May improve femoral head containment in selected children.
│   │   ├── Femoral valgus osteotomy
│   │   │   └── Used in selected proximal femoral deformities and nonunion.
│   │   ├── Femoral derotational osteotomy
│   │   │   └── Corrects abnormal femoral version/torsion.
│   │   ├── Periacetabular osteotomy (PAO)
│   │   │   └── Reorients the acetabulum in symptomatic hip dysplasia
│   │   │       with a sufficiently preserved joint.
│   │   ├── Salter innominate osteotomy
│   │   │   └── Pediatric pelvic procedure for acetabular reorientation.
│   │   ├── Pemberton acetabuloplasty
│   │   ├── Dega acetabuloplasty
│   │   ├── Chiari pelvic osteotomy
│   │   └── Shelf acetabuloplasty
│   │
│   ├── B. Knee: tibia and femur
│   │   ├── High tibial osteotomy (HTO)
│   │   │   ├── Usually performed at the proximal tibia.
│   │   │   ├── Corrects varus alignment in selected patients with
│   │   │   │   medial-compartment knee osteoarthritis.
│   │   │   ├── Medial opening-wedge HTO
│   │   │   └── Lateral closing-wedge HTO
│   │   ├── Distal femoral osteotomy (DFO)
│   │   │   ├── Performed above the knee.
│   │   │   └── Usually corrects valgus alignment and unloads the
│   │   │       lateral knee compartment.
│   │   ├── Tibial tubercle osteotomy
│   │   │   ├── Moves the patellar tendon attachment.
│   │   │   └── Used in selected patellofemoral instability or overload.
│   │   └── Tibial slope-changing osteotomy
│   │       └── Selected cases of recurrent ACL graft failure with
│   │           excessive posterior tibial slope.
│   │
│   ├── C. Leg, ankle, and hindfoot
│   │   ├── Supramalleolar tibial osteotomy
│   │   │   └── Corrects distal tibial varus or valgus near the ankle.
│   │   ├── Fibular osteotomy
│   │   │   └── May accompany tibial correction to permit realignment.
│   │   ├── Calcaneal lateralizing slide osteotomy
│   │   │   └── Shifts the heel laterally for hindfoot varus correction.
│   │   ├── Calcaneal medializing slide osteotomy
│   │   │   └── Shifts the heel medially in selected flatfoot deformity.
│   │   ├── Dwyer calcaneal osteotomy
│   │   │   └── Lateral closing-wedge correction for cavovarus hindfoot.
│   │   └── Anterior calcaneal lengthening osteotomy
│   │       └── Lengthens lateral column in selected flexible flatfoot.
│   │
│   └── D. Forefoot and toes
│       ├── Distal first-metatarsal chevron osteotomy
│       ├── Scarf osteotomy of the first metatarsal
│       ├── Proximal first-metatarsal osteotomy
│       ├── Akin osteotomy of the proximal phalanx
│       ├── Weil lesser-metatarsal osteotomy
│       ├── Closing-wedge or opening-wedge metatarsal osteotomy
│       └── Cuneiform/cuboid osteotomies for selected fixed foot deformities
│
├── 5. UPPER-LIMB OSTEOTOMIES
│   │
│   ├── A. Humerus
│   │   ├── Supracondylar humeral osteotomy
│   │   │   └── Corrects cubitus varus or cubitus valgus after childhood
│   │   │       elbow fracture malunion.
│   │   └── Proximal humeral osteotomy
│   │       └── Selected deformity, malunion, or reconstruction cases.
│   │
│   ├── B. Forearm
│   │   ├── Radial osteotomy
│   │   ├── Ulnar osteotomy
│   │   ├── Combined radius-ulna osteotomy
│   │   └── Corrective osteotomy for malunited forearm fractures or
│   │       congenital deformities.
│   │
│   ├── C. Wrist
│   │   ├── Radial shortening osteotomy
│   │   │   └── May unload the ulnocarpal joint in ulnar impaction.
│   │   ├── Ulnar shortening osteotomy
│   │   ├── Radial opening-wedge osteotomy
│   │   │   └── Used for selected distal radius malunions.
│   │   └── Closing-wedge radial osteotomy
│   │
│   └── D. Hand
│       ├── Metacarpal osteotomy
│       ├── Phalangeal osteotomy
│       └── Used for angular, rotational, or length-related deformity.
│
├── 6. SPINAL OSTEOTOMIES
│   │
│   ├── Purpose
│   │   └── Correct rigid sagittal, coronal, or multiplanar spinal deformity.
│   ├── Ponte or Smith-Petersen osteotomy
│   │   ├── Posterior-column shortening osteotomy.
│   │   ├── Requires a mobile anterior disc space.
│   │   └── Often used for moderate correction across several levels.
│   ├── Pedicle-subtraction osteotomy (PSO)
│   │   ├── Wedge of posterior elements and vertebral body is removed.
│   │   ├── Produces substantial correction at one level.
│   │   └── Used for rigid sagittal imbalance in selected cases.
│   ├── Vertebral-column resection (VCR)
│   │   ├── Removal of part or all of one or more vertebrae.
│   │   ├── Provides the greatest correction.
│   │   └── Reserved for severe, rigid deformity because risk is high.
│   └── Risks
│       ├── Neurological injury
│       ├── Major blood loss
│       ├── Dural tear
│       ├── Nonunion
│       └── Implant failure
│
├── 7. CRANIOFACIAL AND JAW OSTEOTOMIES
│   │
│   ├── A. Maxilla
│   │   ├── Le Fort I osteotomy
│   │   │   └── Repositions the upper jaw in three dimensions.
│   │   ├── Le Fort II osteotomy
│   │   └── Le Fort III osteotomy
│   │       └── Used in more extensive midfacial deformity correction.
│   ├── B. Mandible
│   │   ├── Bilateral sagittal split osteotomy (BSSO)
│   │   │   └── Advances, sets back, or rotates the lower jaw.
│   │   ├── Vertical ramus osteotomy
│   │   ├── Genioplasty
│   │   │   └── Repositions the chin.
│   │   └── Segmental mandibular osteotomy
│   ├── C. Cranial vault
│   │   ├── Fronto-orbital advancement
│   │   ├── Cranial vault remodeling
│   │   └── Used in selected craniosynostosis and craniofacial disorders.
│   └── Main goals
│       ├── Correct malocclusion
│       ├── Improve facial skeletal balance
│       ├── Improve airway in selected cases
│       └── Protect the brain or allow cranial growth in children
│
├── 8. FIXATION AND BONE-GAP MANAGEMENT
│   ├── Internal fixation
│   │   ├── Plates and screws
│   │   ├── Locking plates
│   │   ├── Compression screws
│   │   ├── Intramedullary nails
│   │   └── Staples in selected small-bone procedures
│   ├── External fixation
│   │   ├── Circular Ilizarov-type frame
│   │   ├── Hexapod frame
│   │   └── Monolateral frame
│   ├── Bone graft or substitute
│   │   ├── Autograft
│   │   ├── Allograft
│   │   └── Synthetic graft material
│   └── Choice depends on
│       ├── Bone location and quality
│       ├── Type and size of correction
│       ├── Need for lengthening
│       ├── Patient age and activity
│       └── Risk of nonunion
│
├── 9. HEALING AND REHABILITATION
│   ├── Healing stages
│   │   ├── Inflammation
│   │   ├── Soft callus formation
│   │   ├── Hard callus/mineralization
│   │   └── Remodeling
│   ├── Rehabilitation
│   │   ├── Pain and swelling control
│   │   ├── Protection of the osteotomy
│   │   ├── Weight-bearing restrictions or progression as prescribed
│   │   ├── Range-of-motion exercises
│   │   ├── Muscle strengthening
│   │   └── Gait retraining and return-to-sport/work planning
│   └── Follow-up
│       ├── Serial clinical assessment
│       └── Radiographs to check correction, fixation, and union
│
└── 10. COMPLICATIONS
    ├── General surgical
    │   ├── Anesthesia-related events
    │   ├── Bleeding or hematoma
    │   ├── Infection
    │   ├── Deep-vein thrombosis or pulmonary embolism
    │   └── Wound-healing problems
    ├── Bone-related
    │   ├── Delayed union
    │   ├── Nonunion
    │   ├── Malunion
    │   ├── Loss of correction
    │   ├── Hinge fracture in opening-wedge procedures
    │   └── Bone graft failure or collapse
    ├── Implant-related
    │   ├── Plate/screw irritation
    │   ├── Screw loosening
    │   ├── Plate breakage
    │   └── Need for later implant removal
    ├── Neurovascular
    │   ├── Nerve injury
    │   ├── Vessel injury
    │   └── Compartment syndrome, particularly in limb procedures
    └── Functional
        ├── Stiffness
        ├── Persistent pain
        ├── Under-correction or over-correction
        ├── Adjacent-joint overload
        └── Progression of underlying arthritis

For knee osteotomy, medial opening-wedge and lateral closing-wedge techniques realign the limb to transfer load from a diseased compartment toward the healthier compartment, as described by the AAOS knee-osteotomy overview. Contemporary reviews also report expanding use of patient-specific 3-dimensional planning for complex pediatric and forearm deformity correction, but this is not necessary for most routine osteotomies.A full PDF study guide can be organized as a multi-section module. To keep it clinically coherent, choose the first section to develop in depth.Created the PDF study guide covering all requested sections except craniofacial and jaw osteotomies. It includes fundamentals, osteotomy designs, lower limb, upper limb, spinal osteotomies, fixation, healing, rehabilitation, complications, tables, and revision questions.

Osteotomy Study Guide

PDF Document · PDF

This is a broad osteotomy syllabus. Here is the study map:

Basics, indications, and principles
Preoperative assessment, imaging, and deformity planning
Bone-cut designs: opening wedge, closing wedge, dome, rotational, distraction, and others
Lower-limb osteotomies: hip, pelvis, knee, leg, ankle, foot, and toes
Upper-limb osteotomies: humerus, forearm, wrist, and hand
Spinal osteotomies: Ponte/Smith-Petersen, pedicle-subtraction, and vertebral-column resection
Craniofacial and jaw osteotomies
Fixation methods, grafting, and external fixation
Bone healing, follow-up, and rehabilitation
Complications, prevention, and management

Do you want me to create an updated PDF study guide containing all 10 sections, replacing the earlier version that excluded Section 7?

Understood. The existing PDF remains unchanged and excludes craniofacial and jaw osteotomies.

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