氧化锆表面不同处理方式对锆瓷与饰瓷结合强度的影响

Effect of different surface zirconium oxide treatments on binding strength between zirconia and veneering ceramics

目的:探讨不同方式处理对氧化锆陶瓷与饰瓷结合强度的影响。方法:制作40个氧化锆瓷块、10个镍铬合金片,并按照表面处理方法分为5组,即喷砂组(A组)、结合瓷组(B组)、热酸蚀组(C组)、氧化锆空白对照组(D组)、镍铬烤瓷对照组(E组)。5组试件处理完成后,采用粉浆涂塑法烧结大小为4 mm×4 mm×2 mm的饰瓷。通过万能试验机对所有试件进行剪切强度测试,每组随机抽取一个样本在电子显微镜下进行界面破坏形貌分析。结果:剪切强度结果显示:与D组相比,A组和B组剪切强度差异均无统计学意义(均P>0.05),且二者均显著小于E组(均P<0.05);C组剪切强度值显著高于D组、A组和B组(均P<0.05),但与E组相比差异无统计学意义(P>0.05)。结论:喷砂及烧结的结合瓷层对于增强锆瓷与饰瓷的结合强度无显著作用,热酸蚀可以显著增强锆瓷与饰瓷的结合强度。

Objective:To compare the effect of three different surface zirconium oxide treatments on binding strength and fracture patterns between zirconia and veneering ceramics.Methods:A total of 40 zirconia specimens and 10 nickel-chromium alloy were divided into 5 groups(n=10 in each group):a treatment group by zirconium oxide sand-blaste(Group A),a zirconia bonded porcelain group(Group B),a hot-etching solution group(Group C),a non-treatment zirconia(Group D)and a non-treatment nickel-chromium alloy group(Group E).After all treatments,a veneering porcelain(4 mm×4 mm×2 mm)was formed onto the center of all substrate specimens by plastic coating method.Shear bond strength(SBS)test with a universal testing machine was used in each group.Scanning electron microscopy was used to observe the surface morphology of the damaged specimen interface,which was randomly selected from each group.Results:The SBS test showed that there was no significant difference in SBS results between the Group A,the Group B and the Group D(both P>0.05),and both of them were significant less than that in the group E(both P<0.05).The SBS results in the Group C were significantly higher than that in the Group D,the Group A,and the Group B(all P<0.05),but there were no significant difference compared with that in the Group E(P<0.05).Conclusion:Sand-blaste and liner application on zirconia ceramic contribute no effect to binding strength between zirconia and veneering ceramics,but hot-etching solution can increase the binding strength between zirconia and veneering ceramics.