本文通过194名正畸患者的712只带环的观察，分析了支抗磨牙带环的脱落原因。一、临床资料和方法1．临床资料：随机选择正畸临床固定矫治器矫治患者194名，男性86名，女性108名，年龄Ic～39岁。194名患者均在第一恒磨牙上装置带环。观察带环数712只。2研究方法：①将194名研究对 In this paper, the orthodontic patients through the observation of 712 ring with the analysis of the reasons for the fall of the support molar ring. First, the clinical data and methods 1. Clinical data: 194 orthodontics clinical orthodontic appliance orthodontics patients, 86 males and 108 females, aged from 1 to 39 years old. 194 patients were equipped with a ring on the first permanent molars. The observed number of rings 712. 2 research methods: ① will 194 research on