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目的:评价酸蚀-喷砂处理以及4种不同水门汀材料Fuji I(FUI)、Fuji Cem(FUC)、RelyX Unicem(RXU)、RelyX ARC(RXA))对纤维桩粘固性能的影响。方法:选取80颗无龋坏单根管人前磨牙,根据对应纤维桩表面处理与否随机分为2组,进而根据粘接材料的不同分为4个亚组。常规根管充填和桩道预备后,分别选用4种水门汀材料将表面处理前后的玻璃纤维桩粘接到预备根管内;观察纤维桩表面及每组试件粘接界面扫描电镜(SEM)下微观形貌,测试即刻拉出强度(pull-out test)。结果:表面处理前后纤维桩的各水门汀材料拉出强度以RXA组最高,随后依次为RXU、FUC、FUI组,且各组间均相差显著(P<0.05);纤维桩表面处理后与各水门汀材料的拉出强度较之处理前均显著提高(P<0.05);SEM观察显示:表面处理后纤维桩的表面粗糙度纤维暴露数量均有明显增加;表面处理前后各组粘接界面微观形貌存在差异,各组的粘接界面均较处理前更致密。结论:酸蚀-喷砂处理纤维桩表面后可以提高其与不同水门汀材料的粘接固位力。
OBJECTIVE: To evaluate the effect of acid etching-sandblasting and four different cement materials, Fuji I (FUI), Fuji Cem (FUC), RelyX Unicem (RXU) and RelyX ARC (RXA) Methods: Eighty non-carious single root canal premolar teeth were selected and randomly divided into two groups according to whether the corresponding fiber posts were surface treated or not. Then they were divided into four subgroups according to different adhesive materials. After conventional root canal filling and prepping preparation, four types of cementing materials were used to bond the glass fiber posts before and after the surface preparation to the prepared root canal. The surface of the fiber posts and the bonding interface of each group of specimens were observed under a scanning electron microscope (SEM) Micro topography, the test pull-out strength immediately (pull-out test). Results: The pull-out strength of each cement material before and after the surface treatment was the highest in the RXA group, followed by the RXU, FUC and FUI groups, and the differences among the groups were significant (P <0.05). After the surface treatment, The tensile strength of the material was significantly higher than that before treatment (P <0.05). The SEM observation showed that the fiber surface roughness of the fiber post increased significantly after the surface treatment. The micro-morphology of the interface before and after the surface treatment There are differences, the bonding interface of each group are more dense than before treatment. Conclusion: Acid etching - sandblasting of fiber posts can improve the bonding retention between different cement materials.