Abstract:

Objective To evaluate the effect of different surface treatments on the bonding strength between highly translucent zirconia and veneering porcelain and to provide a research basis for improving the zirconium porcelain bond strength between zirconium and ceramic material.Methods Thirty cylindrical zirconia blocks with 10-mm diameter and 10-mm height were prepared and divided into four groups (n=7), labeled as control group (C), sandblasting group (S), bonding group (B), and sandblasting and bonding group (SB). The surface morphology of zirconia before and after sandblasting was observed in the remaining two specimens. Group C was veneered (2 mm in height and 5 mm in diameter) with porcelain powder by layering after grinding. Group S was sandblasted after grinding. Group B was veneered with a thin layer of porcelain powder as bond coating. Group SB was sandblasted and veneered with a thin layer of porcelain powder. After sintering, the shear specimens were embedded, and a shear bond strength test was conducted. Statistical analysis was conducted to analyze the data. Fracture surface analysis was also performed to determine the failure modes by stereomicroscopy.Results The bonding strength of group C was 21.86 ± 3.18 MPa. For group S, it was 22.12 ± 3.06 MPa. For group B, it was 19.19 ± 1.46 MPa. Finally, for group SB, it was 27.76 ± 1.95 MPa. There was no significant difference in shear strength between group C, group S and group B. There was a significant difference in shear strength between each group and group SB (P < 0.05). Under a stereomicroscope, the observed fracture modes of each group were mainly mixed failure.Conclusion Sandblasting cannot significantly increase the bonding strength between zirconia and veneering porcelain. Veneering with a thin layer of porcelain powder as the bond coating has no obvious effect on the bonding strength. Sandblasting and veneering with a thin layer of porcelain powder as a bond coating can significantly improve the bonding strength between zirconia and veneering porcelain.

Key words: high translucent zirconia, zirconia, veneering porcelain, sandblasting, bond coating, surface treatment, zirconia-porcelain bonding, bonding strength

摘要：

目的 探讨高半透性氧化锆的不同表面处理对其与饰瓷界面结合强度的影响,为临床提高氧化锆全瓷修复体的锆-瓷结合强度提供研究基础。方法 制作30个高10 mm、直径为10 mm的圆柱形KATANA氧化锆试件,分为四组,每组7个：① C组（对照组）打磨后直接堆塑饰瓷粉;② S组（喷砂组）打磨后喷砂,堆塑饰瓷粉;③ B组（结合层组）打磨后先烧结一薄层饰瓷粉,再堆塑饰瓷粉;④ SB组（喷砂+结合层组）打磨后喷砂,烧结一薄层饰瓷粉,再堆塑饰瓷粉;剩余2个试件观察喷砂前后氧化锆的表面形貌。烧结后包埋成剪切试件,采用剪切强度测试法测定各组的剪切强度值,并进行统计学分析。体视显微镜观察瓷层断裂模式。结果 C组剪切强度值为（21.86 ± 3.18） MPa;S组为（22.12 ± 3.06） MPa;B组为（19.19 ± 1.46） MPa;SB组为（27.76 ± 1.95） MPa。C组、S组和B组剪切强度两两比较无显著差异,各组与SB组比较剪切强度值差异有统计学意义(P < 0.05)。体视显微镜下观察各组饰瓷断裂模式以混合破坏为主。结论 单独喷砂处理不能显著增加锆-瓷结合强度,薄涂饰瓷作为结合层对锆-瓷结合强度没有明显影响,喷砂与结合层结合可显著提高锆-瓷结合强度。

关键词: 高半透性氧化锆, 氧化锆, 饰瓷, 喷砂, 结合层, 表面处理, 锆-瓷结合, 结合强度