氧化锆陶瓷与三种树脂粘接剂粘接剪切强度比较

目的探讨适合牙科氧化锆陶瓷的粘接材料。方法将烧结后的氧化锆陶瓷片分为3组,每组32片,分别采用三种自酸蚀粘接剂RelyX Unicem、PanaviaTM F、Superbond C﹠B与喷砂后的氧化锆陶瓷片粘接,水浴24h和水浴30d后,测试其粘接剪切强度。数据用SAS9.12软件进行统计学分析,粘接断面用扫描电镜观察。结果 PanaviaTMF树脂粘接材料粘接强度最好,分别为（31.36±3.49）MPa（水浴24h）、（29.52±3.44）MPa（水浴30d）。Superbond C﹠B能够取得较好的初期粘接强度（31.85±3.61）MPa（水浴24h）,但水浴30d后明显下降至（21.32±2.58）MPa,P〈0.05。RelyX Unicem的初期（水浴24h）粘接强度最小为（13.29±3.05）MPa,P〈0.0001,但水浴30d后粘接强度为（12.06±2.28）MPa,未见明显降低,P（0.05。结论含有MDP磷酸单体的树脂粘接材料可以使牙科氧化锆陶瓷获得最好的粘接效果。使用不含无机填料的化学固化型纯树脂粘接剂可以取得较好的初期粘接强度但长期效果欠佳。一步法自酸蚀树脂粘接剂虽然没有很高的初期粘接强度,但粘接效果尚能持久。

Comparison of shear bond strength between zirconia ceramics and three resin luting cements

Objective To study the bonding strength of zirconia ceramics with three kinds of luting cement materials.Methods Blocks of sintered zirconia ceramics were cut and randomly divided into three groups with 32 slices in each. After being treated with sandblasting, they were bonded with three kinds of luting cements respectively. After preserved in 37℃ distilled water for 24 hours and 30 days, the shear bonding strength of these specimens was tested and the data were analyzed with SAS9.12 software package and the bond sections were observed under scanning electron microscope.Results Two-way ANOVA revealed that the group of PanaviaTMF could attain the best shear bonding strength: (31.36±3.49) MPa (after 24 hours) and (29.52±3.44) MPa (after 1 month). Superbond C﹠B had the high initial shear bond strength (31.85±3.61) MPa (after 24 hours) but low long-term bond strength (21.32±2.58) MPa (after 1month). The one-step self erosion adhesive RelyX Unicem was proved to have the lowest initial bond strength (13.29±3.05) MPa (after 24 hours), but the strength could last longer.Conclusion Resin luting cement containing phosphate monomer (MDP) can provide zirconia ceramics a strong and long-lasting bonding. The cement without inorganic filler can get good bonding strength too, but can’t last long.