Discovery自锁托槽和Smart-Clip自锁托槽脱落率的分析研究

Evaluation of the rate of bond failure of Discovery and Smart-Clip self-ligating brackets

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,并分析脱落原因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 TransbondTM XT and TransbondTM MIP;Smart-Clip self-ligating brackets were bonded with APCTM Ⅱ and TransbondTM 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.