自制透明硅胶导板在前牙树脂嵌体修复中的微渗漏研究

Effect of Customized Transparent Silicon Rubber Template on the Microleakage of Anterior Composite Resin Inlay Restoration

目的:研究自制透明硅橡胶导板在前牙微创美学修复中对树脂嵌体与牙体之间微渗漏的影响,以期为临床修复方法提供更丰富的选择及理论依据。方法:选择30颗离体前牙作为实验对象,按嵌体制作标准预备成Ⅳ类牙体缺损洞型,随机分为3组:A组(自制透明硅橡胶导板制作树脂嵌体);B组(传统硅橡胶导板制作树脂嵌体);C组为对照组(全酸蚀直接法树脂充填),其中A组嵌体借助透明硅橡胶导板辅助就位粘接,所有标本经冷热循环和染色处理后,体式显微镜下观察试件的微渗漏情况。结果:3组均产生了微渗漏,A、B两组的微渗漏值均较C组小(P<0.05),有统计学意义。A组的微渗漏值略小于B组,但差异无统计学意义。结论:自制透明硅橡胶导板能够减少修复体与牙体之间的微渗漏。

Objective：To investigate the influence of customized transparent silicon rubber template on the microleakage of the composite resin inlays in conservative restoration of the anterior teeth.Methods：Thirty healthy extracted anterior teeth were selected and were randomly divided into three groups（group A,group B,and group C）,and ClassⅣcavity was prepared on each tooth.Group A were restored with composite resin inlays directed by customized transparent silicon rubber template,group B were directed by traditional silicone impression template,and group C was restored directly by composite resin and all-etching bonding system.Composite resin inlays in group A were bonded to the teeth under the direction of customized transparent silicon rubber template.After thermal cycling and dying,all the specimens were examined by stereomicroscope.Results：The microleakage existed in all three groups.The microleakage values of group A and group B were less than that of group C（P〈0.05）.The microleakage value of group A was slightly lower than that of group B but without significant difference.Conclusion：The customized transparent silicon rubber template could reduce microleakage value between restoration and tooth.