不同粘结系统及操作者临床经验及对纤维桩冠方微渗漏的影响

Influence of Cements for Bonding Fiber Posts and Clinical Experience of Dentists on the Coronal Microleakage of Post-core Restoration

目的:为了评价不同粘结系统及操作者临床经验及对纤维桩冠方微渗漏的影响。方法:60颗人上颌前牙经过根管预备处理后根据使用的粘结系统随机分为3组,RelyX Unicem组,Clearfil DC Core Automix组,Paracore 5ml组,分别为每组20个样本。以上3组每组再根据粘结操作者的临床经验随机分为两个亚组,一组为专家组,一组为医师组。将纤维桩粘结至根管并制作树脂核后,将样本置入37℃水中存储1个月。经染色及透明化处理。在体式显微镜下记录各亚组的微渗漏得分。结果:RelyX Unicem组纤维桩冠方微渗漏最严重。Paracore 5ml组纤维桩冠方微渗漏最轻。Clearfil DC Core Automix组微渗漏程度位于两者之间。纤维桩的粘结后的微渗漏情况不受临床操作者的临床经验影响。结论:不同粘结系统对纤维桩冠方微渗漏的影响不同,严格按照操作说明的条件下,临床操作者的临床经验对纤维桩的冠方微渗漏无影响。

Objective： To evaluate Influence of cements for bonding fiber posts and clinical experience of dentists on the coronal microleakage of post-core restoration. Methods： Selected 60 teeth were randomly divided into three groups ac- cording to the kind of cements. Each of the group was randomly divided into two subgroups according to the clinical ex- perience of dentists, expert and resident doctor. Bongding the posts to prepared root canals and reconstruct cores. The specimens were immersed in distilled water for one month. After dye and transparent. Each tooth was observed under stereoscopic microscope and the dyeing scores were recorded. Results： The microleakage degrees among three resin bonding cements were significantly different, and group Paracore 5ml showed the least microleakage compared with oth- er three cements. Group RelyX Unicem showed the biggest microleakage. Conclusion： Dinfferent kinds of resin bonding cement have different degrees of the cronal microleakage of post-core restoratios. When the instructions for use of the resin cements were followed strictly, the microleakage degrees were not affected by the clinical experience of dentists.