Augmentation Rhinoplasty (Exam answer for 50 marks)

Definition

Applied Surgical Anatomy (must-know)

• Skeletal framework: nasal bones, upper lateral cartilages, lower lateral cartilages (medial/intermediate/lateral crura), septal cartilage, anterior nasal spine.
• Soft tissue envelope: thin skin (upper dorsum) vs thick sebaceous tip skin affects graft visibility and tip definition.
• Support mechanisms: septum, medial crura-footplate complex, scroll area, ligamentous attachments.
• Vascularity: angular, dorsal nasal, columellar branches; preserve to reduce skin necrosis risk.
• Functional correlation: internal valve angle and dorsal lines must be preserved while augmenting.

Indications

1. Congenital/developmental low dorsum (common in many Asian noses).
2. Saddle nose deformity (post-traumatic, post-septal surgery, infection, autoimmune disease).
3. Post-cleft lip nasal deformity.
4. Revision rhinoplasty with under-projection/collapse.
5. Tip under-projection, poor columellar support.
6. Functional collapse requiring structural grafting (selected cases).

Contraindications / Relative contraindications

• Active nasal/skin infection, uncontrolled sinusitis.
• Unrealistic expectations, body dysmorphic disorder.
• Poor vascularity, severe smoking-related risk.
• Autoimmune active disease (relative; case-based decision).
• Insufficient donor site in complex revision unless alternate plan exists.

Preoperative Assessment and Planning

• Standardized photos: frontal, lateral, oblique, basal, smile view.
• Airway evaluation: septal deviation, valve collapse, turbinate status.
• Skin thickness and scar status.
• Facial proportions: radix, dorsal aesthetic lines, nasofrontal/nasolabial angles.
• Donor site planning: septal, conchal, costal.
• Consent points:
  • asymmetry persists to some degree
  • graft visibility/warping/resorption risks
  • implant infection/extrusion risk (if alloplast used)
  • possible staged revision.

Graft / Implant Materials

A. Autologous grafts (preferred in most reconstructive and revision cases)

1. Septal cartilage
   • Pros: straight, central donor, low morbidity
   • Cons: limited quantity, unavailable in revision/previous septoplasty
2. Conchal cartilage
   • Pros: curved, useful for alar/tip grafting
   • Cons: less rigid for major dorsal augmentation
3. Costal cartilage
   • Pros: abundant, strong, ideal for major augmentation/revision
   • Cons: warping, donor scar/pain, pneumothorax risk (rare)
4. Bone grafts (split calvarial/iliac, less common now)
   • Good rigidity but contouring challenges.

B. Alloplastic materials

• Silicone, ePTFE (Gore-Tex), porous polyethylene (Medpor).
• Advantages: no donor morbidity, easy availability.
• Disadvantages: infection, extrusion, displacement, long-term foreign body issues.
• Usually avoided in infected beds/revisions with thin skin.

C. Composite techniques

• Diced cartilage wrapped in fascia (DCF) for smooth dorsal contour.
• Crushed/cartilage chips for minor contour irregularities.

Operative Technique (Typical Open Augmentation Rhinoplasty)

1. Anesthesia & infiltration
   • General anesthesia usually.
   • Local vasoconstrictive infiltration.
2. Approach
   • Open trans-columellar + marginal incisions (better graft precision).
3. Exposure and framework assessment
   • Identify septum, upper/lower lateral cartilages.
4. Harvest graft
   • Septal/conchal/costal as planned.
5. Prepare recipient bed
   • Sub-SMAS/subperiosteal dorsal pocket, precise midline.
6. Dorsal augmentation
   • Solid carved graft or DCF placed and stabilized.
7. Tip augmentation/support
   • Columellar strut, septal extension graft, shield/cap graft as needed.
8. Adjuncts
   • Spreader grafts, osteotomy, alar base modification if required for balance.
9. Fixation
   • Suture fixation or pocket-fit; avoid mobile graft.
10. Closure and splintage

• Fine skin closure, external splint, internal support selectively.

Flow chart 1: Material selection

Need for augmentation?
        |
        v
Mild dorsal/tip deficiency ------------------> Septal/conchal cartilage
        |
Moderate/major deficiency or revision
        |
        v
Costal cartilage preferred (structural)
        |
If patient refuses donor-site / selected cosmetic case
        |
        v
Consider alloplast (silicone/ePTFE/Medpor) after risk counseling

Flow chart 2: Surgical decision pathway

History + Exam + Photo analysis + Airway assessment
                    |
                    v
Define deformity: dorsal / tip / columellar / combined
                    |
                    v
Plan graft source + approach (open usually for complex)
                    |
                    v
Perform augmentation + structural support + symmetry checks
                    |
                    v
Splinting + follow-up + edema maturation + revision assessment at 12 months if needed

Complications and Management

Early

• Bleeding, hematoma, infection, skin compromise.
• Management: evacuation/antibiotics/debridement as indicated.

Intermediate/Late

• Graft shift, warping (esp. rib), resorption, contour irregularity.
• Over/under-correction, asymmetry.
• Implant extrusion/infection (alloplast).
• Airway compromise if valve or septal support disturbed.

• Precise pocket dissection in midline.
• Strong structural support with adequate fixation.
• Conservative, symmetric carving.
• Avoid oversized rigid implants in thin skin.
• Long-term follow-up before declaring final outcome.

Diagram (schematic)

Lateral nasal framework (schematic)

        Radix
          /\
         /  \      <- Dorsal onlay graft
Nasal bones----====================----
                    |
                    |   <- Septum
                    |
                 [SEG]  <- Septal extension graft
                    |
                 [CS]   <- Columellar strut
                    |
                 [SG]   <- Shield/cap graft at tip

Recent Advances

1. Preservation and structural hybrid rhinoplasty: preserving dorsum where possible while augmenting deficient segments.
2. Piezoelectric instrumentation: more controlled bony work with less soft tissue trauma in selected cases.
3. Diced cartilage-fascia refinements: smoother dorsum, better camouflage.
4. 3D planning and patient-specific simulation: better pre-op communication and precision.
5. Regenerative adjuncts (emerging): PRP/nanofat studied mainly for soft tissue quality, evidence still evolving.
6. Improved rib cartilage processing: anti-warp carving methods, balanced cross-section graft design.
7. Ultrasound/advanced imaging aided follow-up in complex revisions (limited but increasing use).

Short comparison table

High-yield exam points (write in conclusion)

• Autologous cartilage is generally first-line in reconstructive and revision augmentation.
• Success depends on analysis + material selection + structural fixation + skin envelope respect.
• Most errors are from wrong indication, oversized graft, poor pocket control, and inadequate support.
• Final aesthetic judgment should be delayed until edema maturation (often up to 1 year).

Source note

1. a one-page last-minute revision sheet, or
2. a purely diagram + flowchart version for exam reproduction.