【摘要】 目的:对比安氏Ⅲ类患者正畸治疗前后上下颌前部牙槽突宽度。方法:选取骨性安氏Ⅲ类患者30名,均上颌拔除第二前磨牙,下颌拔除第一前磨牙,对其正畸矫治前后头颅侧位片上的上下颌前部牙槽突宽度的结果进行比较分析。结果:安氏Ⅲ类错牙合患者正畸治疗后,上切牙根尖部腭侧及唇侧,牙槽骨宽度变化无显著性差异;下颌切牙根尖部唇侧的牙槽骨宽度较薄,而舌侧相对应处的牙槽骨变化无显著性差异。结论:安氏Ⅲ类患者上颌前部牙槽突吸收与增生基本平衡;而下颌唇侧的增生相对滞后。更多还原

【Abstract】 Objective:To analyze the anterior alveolar width in Class Ⅲ maloccusions after orthodontic treatment. Methods: Thirty cases with maxillary and mandibular first premolar extraction were selected. The pretreatment and posttreatment cephalograms were digitized ,and analysed the width of anterior alveolar bone in maxilla and mandible. Results:No significant differences were found in maxilla the width of anterior alveolar bone. There was statistically significant decrease of alveolar bone on jaw side in mandible. Conclusion: There was a balance of the speed between alveolar resorption and apposition in maxilla. Speed of labial bone resorption is faster than that of jaw bone apposition during orthodontic treatment.更多还原