摘要
目的:比较4种表面处理方法对氧化锆陶瓷与牙釉质黏结强度的影响,为临床应用提供参考。方法:将切割烧结后的Lava氧化锆瓷块(2.7 mm×2.7 mm×5 mm)40件分为4组,分别经喷砂、喷砂/硅烷偶联剂、喷砂/CoJet Sand/硅烷偶联剂、无处理4种表面处理后,用RelyX Unicem与牙釉质黏结,测试剪切黏结强度,采用SPSS20.0软件包对数据进行统计学分析,利用扫描电镜观察断面模式。结果:喷砂/CoJet Sand/硅烷偶联剂组的剪切强度显著高于其他各组(P<0.001),且人工老化试验前、后无显著差异(P=0.595)。电镜观察该组断面模式,未发现"黏结界面破坏型"。结论:氧化锆表面经摩擦化学法硅涂层和硅烷偶联剂联合处理,能够有效提高氧化锆的黏结强度和耐久性。
PURPOSE： To compare the shear bond strength of zirconia to enamel using different surface treatments, in order to provide evidence for clinical practice. METHODS： Forty cut and fully sintered Lava frame zirconia blocks（2.7 mm×2.7 mm×5 mm） were randomly divided into 4 groups and subjected to 4 different surface treatments： no treatment（control）, airborne-particle abrasion; airborne-particle abrasion and silane; airborne-particle abrasion and CoJet sand（silica coating with 30 μm silica-modified alumina particles） and silane. After surface treatment, the zirconia blocks were bonded to acid-etched enamel with self-adhesive resin cement（RelyX Unicem）. Half of the specimens in each group were stored in 37℃ distilled water for 24 h and the others were thermocycled（5℃ and 55℃） for 5000 cycles. All specimens were subjected to shear bond strength（SBS） test. The data was analyzed with SPSS 20.0 software package for two-way ANOVA and t test. Failure mode was observed and analyzed by scanning electron microscope（SEM）. RESULTS：Airborne-particle abrasion and CoJet Sand and silane group resulted in a significantly higher SBS than those in other groups（P0.001）, while no significant difference existed between the specimens which were submerged in 37℃ water stored and thermocycled（P =0.595） within this group. No adhesive failures were observed by SEM in this group.CONCLUSIONS： The combination of tribochemical silica coating with silane coupling can improve the bond of zirconia when self-adhesive resin cement is used and it is recommended as a pre-treatment to increase zirconia retention.
出处
《上海口腔医学》
CAS
CSCD
北大核心
2014年第4期436-440,共5页
Shanghai Journal of Stomatology
