Togari A
Nihon Kyosei Shika Gakkai Zasshi. 1989 Oct;48(5):535-45.
This research shows the relationship between orthodontic treatment and apical root resorption. The latest edgewise appliance with a pre-adjusted bracket (Alexander method) was used in the present experimentation. Examination by roentgen cephalometry and intraoral radiography was performed before and after the maxillary central incisors had been moved orthodontically. The conclusion is that there was no significant difference among the grade 0, 1, 2 and 3 of apical root resorption in the change of long axis inclination of the maxillary central incisors. But there was a significant difference among the grade 0, 1, 2 and 3 of root resorption in the distance of the apical root movement. The most apical root resorption was observed when the apical root was moved lingually.
本研究展示了正畸治疗与根尖吸收之间的关系。本实验采用了最新的带预调托槽的方丝弓矫治器（亚历山大法）。在上颌中切牙正畸移动前后，进行了X线头影测量和口内X线摄影检查。结论是，上颌中切牙长轴倾斜度变化时，根尖吸收的0级、1级、2级和3级之间无显著差异。但在根尖移动距离方面，根尖吸收的0级、1级、2级和3级之间存在显著差异。当根尖向舌侧移动时，观察到最严重的根尖吸收。
