表面处理对Cercon氧化锆陶瓷黏结强度的影响

The effect of 4 kinds of surface treatments on the bonding strength of zirconia ceramics

目的:探讨适合牙科氧化锆陶瓷黏结的表面处理方法。方法:将烧结后的氧化锆陶瓷片分为4组,每组16片,分别采用4种方式(不处理,HF酸蚀+硅烷偶联剂,喷砂+硅烷偶联剂,硅烷偶联剂)处理氧化锆陶瓷片表面并与树脂黏结剂黏结,在水浴24h和水浴30d后测试其黏结抗剪强度,数据用SAS6.12软件加以统计分析,用扫描电镜观察4种处理后的陶瓷表面形貌。结果:喷砂处理后的氧化锆陶瓷的黏结强度为:(34.7±3.44)MPa(水浴24h),(31.5±3.34)MPa(水浴30d),和其他组黏结强度差别有统计学意义(P<0.01),而其他3组间差别均无统计学意义(P>0.05)。结论:喷砂处理的氧化锆陶瓷的黏结强度最高,喷砂是适合牙科氧化锆陶瓷黏结的表面处理方法。

Objective： To study the bonding strength of zireonia ceramics with 4 kinds of surface treatments. Methods： Blocks of sintered zirconia ceramics were eut and randomly divided into 4 groups for 16 slices each. Each group was undergone one of the 4 kinds of surfaee treatments （ untreatment, HF acid etching ＋ silica coating, sandblasting ＋ silica coating or silica coating） and then bonded to resin cement. After preservation in 37 ℃ distilled-water for 24 hours and 30 days respectively, the shear bonding strength of these specimens was tested and data were analyzed by SAS6.12. The surface modality of the ceramics after different surface treatments were observed by scanning-electron-microscopy（SEM）. Results： Two-way ANOVA was revealed that the group of sandblasting ＋ silica coating attained the highest shear bonding strength ： 34.7 ± 3.44 MPa （ after 24 hours）, 31.5 ± 3.34 MPa （ after 30 days）, which was significantly different from other groups （P 〈 0. 01 ）. While the differences among the other three groups showed no statistical significance （P 〉0. 05 ）. Conclusions： Sandblasting is a suitable surface treatment for the bonding of the zirconia ceramics.