In distraction osteogenesis, the term 'consolidation index' is defined as:
- A Millimetres of new length gained per day of distraction
- B Number of days the fixator remains in place per centimetre of lengthening achieved ✓
- C Ratio of regenerate diameter to the diameter of the adjacent native cortex
- D Interval between corticotomy and the start of distraction
Correct answer: B. Number of days the fixator remains in place per centimetre of lengthening achieved
Explanation
The consolidation index expresses the total duration of external fixation needed per centimetre of length gained, combining the latency, distraction and maturation phases. It is used to compare devices and protocols, since prolonged time in the frame drives pin tract sepsis, joint stiffness and patient morbidity. Option A describes the distraction rate, option D defines the latency period, and option C is a descriptive measure of regenerate quality, not an index of duration.
Reference: Campbell's Operative Orthopaedics, 14th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.