Purpose: To measure the angle between maxillary incisor and alveolar bone by the use of cone-beam CT (CBCT), in order to assess preoperative risks and provide guidance in anterior dental implantation.
Methods: A total of 374 patients were included and divided into 3 age groups: group 1 (18-34 years), group 2 (35-59 years) and group 3(above 60 years). All patients underwent CBCT preoperatively, the angle between maxillary incisor and alveolar bone was measured though Kavo eXam Vision software. The data were analyzed with SPSS16.0 software package for Student's t test.
Results: In group 1, 2 and 3, the angle between maxillary incisor and alveolar bone was (13.81±4.37)°, In group 2, the ankle between maxillary incisor and alveolar bone was (15.19±5.23)°, (18.51±6.62)°, respectively; there was no significant difference between male and female in each group, but there was significant difference between every 2 age groups in the angle between maxillary incisor and alveolar bone.
Conclusions: The angle between maxillary incisor and alveolar bone is increasing with the increase of age, but no significant difference between male and female is detected. For patients with dental implantation in anterior area, CBCT should be taken to measure the angle between maxillary incisor and alveolar bone for aesthetic assessment, especially for old patients.
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