氧化锆核瓷处理与饰面瓷工艺对瓷/瓷结合强度的影响

Effects of surface treatments on bond strength of pressed and layered veneering porcelain to zirconia

目的:研究染色或硅涂层处理对氧化锆核瓷粉浆涂塑和热压铸两种工艺饰面瓷结合的影响。方法:将制作氧化钇稳定四方相氧化锆(Y-TZP)瓷块分为6组(A1、A2、A3、B1、B2、B3),其中A1、B1组不处理作为空白对照,A2、B2组染色,A3、B3组表面以摩擦化学法制备硅涂层,随后A1～A3组以粉浆涂塑工艺制备饰面瓷,B1～B3组以热压铸工艺制备饰面瓷,测试各组试件的剪切结合强度和分析断裂模式,测试结果进行统计分析。扫描电镜观察各种表面处理Y-TZP核瓷的微观形态以及典型试件的断裂面形态。结果:不论经过何种表面处理,Y-TZP核瓷与粉浆涂塑法和热压铸法两种工艺饰面瓷之间的剪切强度值均无统计学差异(P>0.01);当以粉浆涂塑法制备饰面瓷时,进行硅涂层处理的Y-TZP核瓷与饰面瓷的剪切强度值高于染色处理和不处理(P<0.01);当以热压铸法制备饰面瓷时,Y-TZP核瓷与饰面瓷的剪切强度值不受表面处理因素影响(P>0.01)。结论:染色和饰面瓷工艺对Y-TZP核瓷与饰面瓷结合强度不造成影响,以粉浆涂塑工艺制备饰面瓷时,硅涂层可提高双层瓷的结合强度。

Objective：To evaluate the effects of surface treatments on bond strength of pressed and build-up veneering porcelain to zirconia.Methods：CAD/CAM Y-TZP blocks were fabricated and classed into 6 groups.Groups A1 and B1 received no treatment（as the control group）,groups A2 and B2 received dye-penetrating technique,groups A3 and B3 were tribochemically silica coated.Then,groups A1 to A3 and groups B1 to B3 were veneered using build-up technique or lost-wax press technique respectively.The double-layered specimens were subjected to shear bond strength（SBS） testing.Data were statistically analyzed using one-way ANOVA and LSD test（α=0.01）.The treated Y-TZP surface and the typical fractured Y-TZP surfaces were examined using a scanning electron microscope.Results：No matter which methods were used for treating Y-TZP surface,there was no statistically significant in the mean SBS values between the two veneering techniques.When using build-up veneering technique,tribochemically silica coating provided the highest SBS,while no statistically difference was found among the surface treatments of Y-TZP blocks for the lost-wax press technique groups.Conclusion：Dyeing and veneering techniques had no influence on bond strength of zirconia to veneering porcelain,while silica coating significantly improved the bond strength for the build-up veneering technique.