Abstract
Objective To determine the difference between three-dimensional CBCT scan and two-dimensional radiograph in the evaluation of the alveolar bone grafting.Methods 39 cleft lip and palate patients (49 cleft sites) who were at least 3 months after secondary alveolar bone grafting were selected.Occlusal radiographs and CBCT scans of the cleft were simultaneously taken to evaluate the alveolar bone grafting and the results were compared between these two methods.Results Of the 20 Bergland type Ⅰ and 18 Bergland type Ⅱ post grafting sites,there were 9 (45.00％) and 3 (16.67％)grading A1B1C1 D1 in terms of alveolar thickness scale,respectively.In the occlusal radiographs,the alveolar thickness and height of 45.00％ Bergland type Ⅰ sites and 16.67％ Bergland type Ⅱ sites were consistent with the scales in CBCT scans.55.00％ Bergland type Ⅰ sites and 83.33％ Bergland type Ⅱ sites may be overestimated by occlusal radiographs.Conclusions In the evaluation of alveolar bone grafting,the results of three-dimensional CBCT scans were inconsistent with those of two-dimensional radiographs,among which CBCT seem better. Key words: Cleft lip and palate; Alveolar bone grafting; Cone-Bean computed tomography; Occlusal radiograph
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