Abstract
Secondary bone grafting into alveolar clefts has become a very popular procedure, though ideal results are not always obtained. In 76 patients treated alveolar bone graft from 1975 to 1988, data were obtained by studying 64 alveolar clefts of 51 patients. In order to evaluate the prognostic factors of this procedure, the relationships of clinical factors and prognosis of alveolar cleft after bone grafting were evaluated by univariate and multiple logistic regression analyses.
The results were as follows:
1. Bone bridge formation w as found in 51 alveolar clefts (79.7% ).
2. The factors correlated with bone bridge formation were the age at the time of bone grafting, pre-and postoperative orthodontic treatment, and kinds of bone materials for univariate analysis.
As for multiple logistic regression analysis, the age at the time of bone grafting, kinds of bone materials and kinds of closure techniques by soft tissue flaps were found to be independent cofactors.
3. The fac tors correlated with acceptable alveolar bone level were the age at the time of bone grafting, the eruption stage of the canine on the cleft side and the cleft width. As for multiple logistic regression analysis, only the cleft width was found to be an independent cofactor.
