纳米硅涂层对Cercon氧化锆陶瓷与牙本质黏结强度的影响

Effect of nano-silica coating on bonding strength of zirconia ceramics to dentin

目的:探讨利用溶胶凝胶法进行纳米硅涂层表面处理对Cercon氧化锆陶瓷黏结强度的影响。方法:将烧结后的氧化锆陶瓷分为4组,每组16片,分别采用4种方式(空白对照、喷砂、喷砂+硅烷偶联剂、喷砂+纳米硅涂层+硅烷偶联剂)处理氧化锆陶瓷片表面,并通过树脂黏结剂与牙本质黏结,在水浴24h后测试其黏结剪切强度。采用SAS6.12软件包对数据进行方差分析,用扫描电镜观察处理后的陶瓷表明形貌。结果:喷砂+纳米硅涂层+硅烷偶联剂表面处理的氧化锆陶瓷的黏结强度最高,与其他各组黏结剪切强度的差别均有显著性(P=0.000);喷砂+硅烷偶联剂组与喷砂组之间差别无统计学意义(P=0.827);喷砂+硅烷偶联剂组和喷砂组与空白组比较均有统计学意义(P=0.001)。结论:通过溶胶凝胶法在喷砂后的陶瓷表面制备纳米硅涂层配合使用硅烷偶联剂,可以显著提高Cercon氧化锆陶瓷的黏结强度。

PURPOSE： To investigate the effect of silica coating by sol-gel process on bonding strength of zirconia ceramics to dentin. METHODS： Blocks of sintered zirconia ceramics were cut and randomly divided into 4 groups,16 slices in each group. Each group was subject to one of the 4 kinds of surface treatment （control group, sandblasting, sandblasting ＋silicone, sandblasting ＋ silica coating ＋ silicone ） and then bonded to dentin with resin cement. After preservation in 37°C distilled water for 24 hours, the shear bonding strength of these specimens was tested and the data was analyzed with SAS6.12 software package for analysis of variance. The surface modality of the ceramics was observed under scanning electron microscopy （SEM）. RESULTS： The group of sandblasting＋ silica coating ＋ silicone attained the highest shear bonding strength, which was significantly different from the other groups （P=0.000）;There was no significant difference between the sandblasting and sandblasting ＋ silicone group （P=0.827）, which was significantly different from the control group （P=0.001）. CONCLUSION： Silica coating by sol-gel process, coupled with silicone, can significantly increase the bonding strength of zirconia ceramics to dentin.