A corticotomy (as opposed to an osteotomy) for distraction osteogenesis with the Ilizarov technique is preferred because:

• A It creates a faster and stronger bone consolidation by complete division of the bone including periosteum
• B It preserves the medullary blood supply and periosteum, maintaining the osteogenic potential needed for regenerate bone formation ✓
• C It reduces the risk of pin site infection at the fixator wires
• D It eliminates the need for a latency period before distraction begins

Explanation

A corticotomy (low-energy percutaneous cortical cut without disturbing periosteum or medullary blood supply) is preferred over a standard osteotomy for distraction osteogenesis. Preserving the periosteum (the primary osteogenic sleeve) and endosteal blood supply maximizes regenerate bone formation during distraction. High-energy osteotomies that strip periosteum or destroy medullary blood supply significantly impair osteogenesis in the distraction gap. The technique involves multiple small perforations around the circumference followed by controlled fracture through twisting — preserving biological tissues.

Reference: Maheshwari Essential Orthopaedics, 6th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.