正常(牙合)人牙(牙合)特点在固定矫治器中的应用

目的　探讨使用固定矫治器治疗中国错畸形患者时的注意事项。方法　比较恒牙列正常中国人与 白种人的牙冠突距、冠角、牙冠转矩及磨牙补偿角的差异,以及测量正常中国人牙冠唇颊面中心区的近远中向、 龈向轮廓形态和牙弓形态。结果　正常的特征、牙弓形态以及牙冠唇颊面中心区的近远中向和龈向轮廓形 态,在中国人与白种人间存在人种差异。结论　使用方丝弓、直丝弓矫治器治疗中国错畸形患者时,弓丝弯制中 应进行必要的调整,有必要设计适合于中国人使用的直丝弓矫治器。

The Clinic Skill in Fixed Appliance Based on Characteristics of Chinese Normal Occlusion

Objective To study the bracket placement and arch wire bending based on ethnic differences and individual differences of normal occlusion.Methods The prominence, tip, torque, upper first molar offset of crown and arch form between Chinese and Caucasian normal occlusion were compared.Results The results showed the ethnic differences of prominence, tip, torque, upper first molar offset of crown and arch form between Chinese and Caucasian normal occlusion. The placement of bracket was influenced by the crown morphology.Conclusion The adjustments of the bracket placement and arch wire bending with Edgewise and pre-adjusted appliance are necessary to adapt to ethnic difference and individual difference.