氧化物陶瓷与3种树脂水门汀初期粘接强度比较

目的:通过对2 种修复用氧化物陶瓷与3 种树脂水门汀的粘接抗剪强度比较,探讨适合牙科氧化物陶瓷的粘接材料.方法: 分别用3 种树脂水门汀Superbond C&B、RelyX~(TM)Unicem、Panavia~(TM) F与喷砂后的氧化锆(ZrO2)及三氧化二铝(Al_2O_3)陶瓷的粘接面粘接,37 ℃水浴24 h后测试其粘接抗剪强度,数据用SAS 9.12 软件进行统计学分析.结果: Al_2O_3陶瓷组间均有显著性差异(P<0.000 1), Superbond C&B粘接强度最高为(37.60±2.06) MPa. ZrO2陶瓷组中Superbond C&B与Panavia~(TM) F的粘接强度差异无显著性(P>0.05),RelyX~(TM)Unicem粘接强度最低为(13.29±3.05) MPa.结论: Superbond C&B、Panavia~(TM) F与氧化物陶瓷均具有较高的粘接强度,一步法自酸蚀粘接剂RelyX~(TM)Unicem虽然操作简便、提高了工作效率,但不如多步法系统获得的粘接强度大.

A comparison of preliminary bond strength between oxide ceramics and three resin luting cements

Objective:To compare the shear bond strength between oxide ceramics and three resin cements. Methods: Blocks of zirconium dioxide and aluminium sesquioxide ceramics were treated with sandblasting and bonded with three luting cements respectively. After preserved in 37 ℃ water for 24 h, the shear bond strengths of these specimens were tested and the data were analyzed by SAS9.12 software package. Results: There were significant differences among alumina ceramics which manifested that shear bond strength of Superbond C&B was the highest (37.60±2.06) MPa. However, in zirconium dioxide groups, RelyX~(TM) Unicem showed the lowest bond strength(13.29±3.05) MPa,but there was no difference between Superbond C&B and Panavia~(TM) F. Conclusion: Both Superbond C&B and Panavia~(TM) F have reliable shear bond strength with oxide ceramics, while RelyX~(TM) Unicem is not so perfect.