树脂加强型玻璃离子结合不同牙面酸蚀方法对托槽粘接效果的影响

Effects of different management combined with resin-modified glass ionomer on orthodontic brackets bonded to tooth enamel

目的:观察比较自酸蚀和全酸蚀处理牙面时,树脂加强型玻璃离子粘接剂粘接托槽的临床效果。方法:随机选择牙列完整的40例非拔牙固定正畸矫治患者的上颌患牙400颗,分为实验组:自酸蚀封闭剂(self-etching primer,3M公司)配合树脂加强型玻璃离子粘固剂(resin-modified glassionomer cement,RMGIC);对照组:37%磷酸配合加强型玻璃离子粘固剂粘接托槽,观察比较正畸治疗期间两组患者MBT托槽的脱落情况。结果:树脂加强型玻璃离子结合使用自酸蚀与传统的酸蚀方法粘接MBT托槽的脱落率比较,差异无统计学意义(P>0.05)。结论:①全酸蚀配合树脂加强型玻璃离子正畸粘接剂的粘接强度更好;②RMGIC作为一种新型的正畸粘接材料,结合了传统玻璃离子和复合树脂的优点,具有临床操作可控性强、MBT托槽准确率较高的优点,满足了临床需求,可以选择应用。

Objective：To observe and compare the effects of different management combined with resin-modified glass ionomer on orthodontic brackets bonded to tooth enamel by self-etching primer（SEP） or total-etching adhesives.Methods： 400 maxillary teeth from 40 patients free of teeth extracted when receiving fixed orthodontic treatment were recruited and randomly allocated to groups of treatment and controls.The treatment group received management of SEP with resin-modified glass ionomer cement（RMGIC） and the controls were dealt with 37% phosphoric acid plus reinforced glass ionomer cement for comparison of the MBT bracket bonding failure.Results： No statistical difference was found between the two groups（P0.05）.Conclusion： Total-etching adhesives with SEP might produce better bracket bonding effects on the tooth enamel,and yet,RMGIC,a new orthodontic material,if combined with SEP,could also be favorable to clinical use for its adequate strength exerted by MBT bracket bonding.