Bone Defect Management (Masquelet vs Bone Transport)

Definition

Management of segmental bone defects resulting from:

• Trauma

• Infection

• Tumour resection

Requires restoration of:

• Mechanical stability

• Biological environment

Key Principle

Stability + vascularity + infection control = success

Treatment Determinants

• Defect size

• Infection status

• Soft tissue condition

• Patient compliance

Main Techniques

1. Masquelet Technique (Induced Membrane)

Concept

• Two-stage reconstruction using a biologically active induced membrane

Stage 1

• Radical debridement

• PMMA spacer placement (± antibiotics)

• Stabilisation

Membrane forms around spacer

Stage 2 (4–8 weeks)

• Remove spacer

• Preserve membrane

• Fill defect with bone graft

Biological Insight (Key Advantage)

• Induced membrane is:

  • Hypervascular (~32.8 vessels/mm²)

  • Thick (~2.4 mm)

  • Rich in collagen type I

Acts as a biological chamber, not true periosteum

Collagen Type I

Advantages

• Technically simpler

• Shorter learning curve

• Effective in infected cases

• Good for moderate defects (2–5 cm)

Limitations

• Requires sufficient bone graft

• Two-stage procedure

• Less effective in very large defects

2. Bone Transport (Ilizarov Method)

Concept

• Gradual bone regeneration via distraction osteogenesis

Technique

• Osteotomy performed

• Bone segment transported across defect

• New bone forms in distraction gap

Advantages

• Ideal for large defects (>5 cm)

• No need for large graft

• Can correct deformity simultaneously

Limitations

• Long treatment duration

• High patient burden

• Requires strong compliance

• Pin site complications common

Complications (Both Techniques)

• Infection

• Joint stiffness

• Malalignment

• Psychological burden

Comparison Table

Masquelet = biological optimisation strategy
Ilizarov = mechanical regeneration strategy

The real difference:

• Masquelet depends on graft biology

• Transport depends on host regenerative capacity

Pits & Pearls

• Soft tissue status determines success more than technique

• Infection control is always first step

• Masquelet membrane must be preserved

• Ilizarov requires patient commitment

Pitfalls

• Choosing technique based only on defect size

• Ignoring soft tissue envelope

• Poor fixation strategy

• Underestimating patient compliance

Comparison: Masquelet vs Bone Transport

Mini Decision Algorithm