自粘接树脂水门汀与二氧化锆陶瓷间粘接耐久性的研究

摘要

目的比较不同自粘接树脂水门汀与二氧化锆陶瓷间的粘接强度和耐久能力。方法二氧化锆陶瓷片经烧结、研磨后，接受50μm Al2O3颗粒喷砂处理。使用激光共聚焦显微镜对研磨、喷砂处理的陶瓷表面粗糙度进行测量。研磨、喷砂处理的陶瓷片分别与5种自粘接树脂水门汀： Biscem（BC）、 G-Cem（GC）、 RelyX U100（RU）、Multilink Speed（MS）、 Maxcem（MC）进行粘接。每组粘接试件分为2个亚组分别接受0、10000次冷热循环后进行剪切粘接强度测量。使用单因素方差和独立样本t检验对数据进行分析。结果喷砂处理明显增加了陶瓷表面粗糙度指标Ra值（P＜0.001）。冷热循环降低了所有实验组的粘接强度（P＜0.001），其中研磨处理陶瓷片与MS组的粘接强度明显高于与BC组、 GC组、 RU组和MC组（P＜0.001），喷砂处理明显提高了BC组、 GC组、 RU组和MC组的粘接强度（P＜0.001）。结论不同自粘接树脂水门汀与二氧化锆陶瓷间的粘接耐久能力存在明显差异，其粘接耐久能力不完全受陶瓷表面喷砂处理的影响。%Objective To compare the bond durability of five self-adhesive resin cements to polished and sand-blasted zirconia ceramic. Methods Zirconia ceramic samples were sintered and polished. Half of polished ceramic samples were sandblasted with 50μm alumina particles. The roughness of polished and sandblasted zirconia ceramic surface was measured by 3D-laser scanning microscope. The polished and sandblasted ceramic samples were bonded to composite cylinders with either Biscem(BC), G-Cem(GC), RelyX U100(RU), Multilink Speed(MS) or Maxcem (MC). The samples divided into two subgroups to receive respectively shear test after 0 and 10 000 time thermal cy-cles. The data were analyzed by one-way ANOVA test and independent sample t test. Results Air abrasion signifi-cantly increased Ra of zirconia ceramic surface(P<0.001). Thermocycling decreased significantly the bond strengths of all test groups(P<0.001), in which polished specimens bonded with MS had significantly higher bond strength than those bonded with either BC, GC, RU, or MC(P<0.001), and air abrasion significantly increased the bond strength of BC, GC, RU and MC, whereas the bond strength of MS was not significantly affected by air abrasion. Conclusion The bond durability of different self-adhesive resin cements to zirconia ceramic has significant differences, and their bond durability was not completely influenced by air abrasion of ceramic surface.