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目的 :比较全酸蚀和自酸蚀两种粘结系统对纤维桩核冠方微渗漏及粘结强度的影响,为纤维桩的临床应用及相关研究提供参考。方法:42颗完整离体牙,随机选取其中2颗作为对照,其余随机分为2组,常规处以截冠、根管预备、充填以及桩道预备后,分别选用全酸蚀粘结剂Prime&Bond(全酸组)和自酸蚀粘结剂Xeno~RⅤ(自酸组)进行纤维桩粘结,制作试片,通过染色、扫描电子显微镜(SEM)观察两组试片的冠方微渗漏情况;通过薄片推出实验,测试两组试片的粘结强度,进行统计学分析。结果:肉眼观察全酸组试片无染色剂渗入,自酸组试片有染色剂渗入。SEM观察全酸组的粘结界面无间隙,可见明显的粘结剂树脂突,自酸组的粘结界面有间隙存在。薄片推出实验平均推出力值全酸组为(90.27±13.62)N,自酸组为(81.80±21.68)N;平均粘结强度全酸组为(14.75±2.00)MPa,自酸组为(12.71±3.54)MPa,差异无统计学意义(P>0.05)。结论:在显微镜下观察全酸蚀粘结剂比自酸蚀粘结剂发生冠方微渗漏的几率小,但在粘结强度上,全酸蚀和自酸蚀两种系统无显著性差异。
OBJECTIVE: To compare the microleakage and cohesive strength of two kinds of adhesive systems, such as total acid etching and self-etching, to provide a reference for the clinical application and related research of fiber posts. Methods: Forty-two intact teeth were randomly divided into two groups. Two groups were randomly selected and divided into two groups randomly. After conventional crown cutting, root canal preparation, filling and prepping preparation, All acid group) and self-etching binder Xeno ~ R V (self-acid group) were stained with fiber posts to prepare test pieces. The corneal microleakage was observed by scanning electron microscopy (SEM) Situation; through the introduction of the test sheet, test the bond strength of the two groups of specimens for statistical analysis. Results: The naked eye observation of the whole acid test group no dye penetration, self-acid test specimens with dye penetration. SEM observation of all-acid group bonding interface without gaps, showing a clear adhesive resin bumps, self-acid group bonding interface there is a gap. The average push-out force of the sheet was (90.27 ± 13.62) N in the whole acid group and (81.80 ± 21.68) N in the self-acid group. The average bond strength was 14.75 ± 2.00 MPa in the all-acid group and 12.71% ± 3.54) MPa, the difference was not statistically significant (P> 0.05). CONCLUSIONS: All-acid erosive binders are less likely to corneal microleakage than self-erasing binders under a microscope. However, there is no significant difference between the total acid erosions and the self-etching systems on bond strength .