Before removal of an Ilizarov frame at the end of tibial lengthening, the frame is typically dynamized for several weeks. The main purpose of dynamization is to:
- A Increase the daily distraction rate safely
- B Reduce the incidence of pin tract infection
- C Allow controlled axial loading through the regenerate to promote its cortical maturation ✓
- D Correct any residual translational deformity
Correct answer: C. Allow controlled axial loading through the regenerate to promote its cortical maturation
Explanation
Dynamization unlocks the longitudinal connection between rings so that weight bearing loads the regenerate axially. Controlled compressive loading stimulates remodelling and corticalisation of the new bone and tests its strength before frame removal, reducing the risk of refracture. It does not alter distraction rate, has no effect on pin site sepsis, and translation is corrected by frame adjustment rather than by dynamization.
Reference: Campbell's Operative Orthopaedics, 14th ed.
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Written and medically reviewed by the StethoPrep medical team.