目的 分析Discovery自锁托槽和Smart - Clip自锁托槽光固化湿粘接后托槽的脱落率.方法 随机抽取2009-2011年临床应用Discovery自锁托槽及Smart - Clip自锁托槽进行矫治的正畸病例,分别采用3M公司生产的TransbondTM XT光固化粘接剂管装+ TransbondTM MIP耐湿性处理液和APCTMⅡ预置粘接剂托槽+ TransbondTM MIP耐湿性处理液严格按照粘接要求进行粘接,记录其脱落情况,计算脱落率,并分析脱落原冈及其与口腔卫生之间的关系.结果 口腔卫生情况对于托槽脱落率有一定的影响；下颌同名牙托槽脱落率明显高于上颌；托槽脱落再粘接后发生再次脱落者主要集中在下颌.结论 临床应重视自锁托槽的粘接,加强患者口腔卫生保健,以降低托槽脱落率.%Objective To evaluate the rate of bond failure of Discovery and Smart-Clip self-ligating brackets. Methods Patients treated with Discovery or Smart-Clip self-ligating brackets in the year of 2009-2011 were selected randomly. Discovery self-ligating brackets were bonded with Transbond? XT and Transbond? MIP; Smart-Clip self-ligating brackets were bonded with APC? II and Transbond? MIP. The rate of bond failure was calculated. Its causes and its relationship with oral hygiene were analyzed. Results Oral hygiene had an effect on the rate of bond failure;the failure rates of lower teeth were obviously higher than those of upper teeth;the failure of rebonding mainly happened to lower teeth. Conclusions It is of great importance to bond self-ligating brackets properly and improve oral hygiene of patients,so that we can reduce the rate of bond failure.
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