[Measurement of the volume absorption of alveolar bone grafting].

PURPOSE: To determine the bone absorption at different time after alveolar autogenous bone grafting using spiral CT three-dimensional reconstruction.

METHODS

Twenty unilateral cleft lip and palate patients(15 males,5 females) were chosen to undergo three-dimensional CT scans after alveolar bone graft, region of interest(ROI) volume measurement of GE AW 4.1 software was used to calculate the capacity of alveolar cleft at 1 week, 3 months, 6 months after surgery.

RESULTS

An average bone loss of 35.74% was found after 3 months, 55.89% after 6 months. In labial and palatal direction, labial bony bridge was more obvious than palatal bony bridge.

CONCLUSIONS

Bone resorption is present after alveolar bone graft, and becomes more severe with time going on.