摘要
Abstract
Objective Using three-dimensional CBCT to evaluate dehiscence and fenestration of the incisor alveolar bone after the incisor retraction in adult patients with bimaxillary protrusion. Methods Twenty adult patients (six males, fourteen females, mean age: 22.8±3.0) with Class1 bimaxillary protrusion were selected from January 1, 2013 to December 31, 2015.These patients extracted four first premolars used Micro- Implant anchorage to strengthened anchorage. The CBCT were taken before and after orthodontic treatment. Alveolar bone dehiscence and fenestration were observed and analyzed statistically . All statistical analyses were performed using SPSS23.0 statistical analysis software, using the χ2 test to compare the rate of alveolar bone fenestration and dehiscence before and after orthodontic treatment. Results A total of 80 teeth were found in the maxillary incisors, there were 18 teeth fenestration before treatment and 26 teeth fenestration after treatment, but do not have statistical significance. A total of 80 teeth were found in the mandibular incisor, there were 8 teeth fenestration before treatment and 15 teeth fenestration after treatment, but do not have statistical significance, there was no statistical significance in the fenestration rate of the incisor before and after the treatment(P>0.05). A total of 80 teeth were found in the maxillary incisors, there were 3 teeth dehiscence before treatment and 6 teeth dehiscence after treatment. There was no statistical significance in the dehiscence rate of the maxillary incisor before and after treatment(P>0.05). A total of 80 teeth were found in the in the mandibular incisor, there were 10 teeth dehiscence before treatment and 21 teeth dehiscence after treatment, There was statistical significance in the dehiscence rate of the mandibular incisor before and after treatment(P<0.05). Conclusion After using Micro-Implant in adult patients with Class1 bimaxillary protrusion, there was no significant change in the alveolar bone fenestration of the incisors , the rate of alveolar bone dehiscence increased in the mandibular incisor . It is suggested that orthodontist should pay close attention to the alveolar bone of the mandibular incisors.关键词
双颌前突/牙槽骨/骨开窗/骨开裂/CBCTKey words
bimaxillary protrusion/alveolar bone/dehiscence/fenestration/CBCT分类
医药卫生
