Ⅲ类颌间牵引在安氏Ⅲ类错矫治中的应用

Application of class Ⅲ intermaxillary elastics in the treatment of class Ⅲ malocclusion

颌间牵引可分为Ⅱ类牵引、Ⅲ类牵引和垂直牵引。在安氏Ⅲ类错矫治中,Ⅲ类颌间牵引常被用来唇展上前牙,内收下前牙及后移下牙列,牵引下颌骨向后,促进上颌骨向前生长发育,以辅助纠正前牙反以及后牙近中咬合关系,达到矫正安氏Ⅲ类错的目的。不正确的使用颌间牵引也会影响矫治效果。本文将对颌间牵引的分类、牵引橡皮圈的性能特点以及Ⅲ类颌间牵引在安氏Ⅲ类错矫治中使用的方式、牵引的力值、使用的时机、作用机制、副作用及预防等作简要综述。

Intermaxillary elastics can be divided into class Ⅱ elastics, class Ⅲ elastics and vertical elastics. In the treatment of class Ⅲ malocclusion, class Ⅲ intermaxillary elastics are often used to hope to correcting anterior crossbite and mesiocclusion, by protacting the upper anterior teeth and the maxilla, retracting lower anterior teeth and the lower dentition and even the mandible. The application of elastics in an improper way may affect the treatment effect.The classification of intermaxillary elastics, the performance characteristics of rubber band and the style, force, time,mechanism and side effect of class Ⅲ intermaxillary elastics used in the treatment of class Ⅲ malocclusion are reviewed in this article.