不同釉面酸蚀处理及污染对托槽粘结强度影响的离体实验研究  

An in vitro study of the effects of different enamel conditioners on the shear bond strength and the adhesive remnant index

作　　者：章利[1] 吴建勇[2] 唐镇[2] 方刚[1] 

机构地区：[1]杭州口腔医院正畸科,310006 [2]南昌大学口腔医院正畸科

出　　处：《实用口腔医学杂志》2006年第5期718-721,共4页Journal of Practical Stomatology

摘　　要：目的:比较经过不同釉面酸蚀处理及污染后,树脂改良型玻璃离子水门汀粘结托槽的抗剪强度及粘结剂残留指数。方法:收集因正畸需要而拔除的健康前磨牙108个,分别经过3种不同的釉面酸蚀处理后,在干、湿性环境下完成粘结,在Instron力学测试机上测定抗剪强度并记录粘结剂残留指数。结果:经Transbond plusSEP+RMGICs+唾液处理后树脂改良型玻璃离子水门汀与牙面粘接后抗剪强度最大;无论用何种方法处理釉面后,RMGICs在水或唾液污染时较干性环境下釉面抗剪强度要大,差异有显著性(P<0.05)。结论:用Transbond plusSEP处理釉面后RMGICs的抗剪强度最大;RMGICs的粘结强度不会因水或唾液污染而降低。Objective：To evaluate the effects of different enamel conditioners in combination with an adhesive on the shear bond strength and the adhesive remnant index in vitro. Methods：One hundred and eight permanent healthy premolars from orthodontic patients and fresh saliva from a healthy young volunteer were collected. The teeth were cleaned ,dried and etched by phosphoric acid, polyacrylic acid or Transbond plus SEP respectively（ 36 teeth for each agent）. Then the teeth were bonded to brachet by RMGICs with the presence of water, saliva on the tooth surface or without any of them respectively（ 12 teeth in each group）. After bonding,all samples were tested on a testing machine of Instron. Shear bond strength and adhesive remnant index were recorded. Results：Highest mean shear bond strength was observed in the group of teeth etched by Traspond plus SEP and bonded by RMGICs with the presence of saliva. Higher mean shear bond strength was obtained with the presence of saliva or water on the tooth surface than without any of them. Conclusion：Transbond plus SEP conditioning followed by RMGICs bonding may produce high shear bond strength between moistured tooth surface and brachet.

关 键 词：正畸粘结 抗剪强度 自酸蚀 粘结剂残留指数 

分 类 号：R783.1[医药卫生—口腔医学]