不同表面处理和不同粘结剂对氧化锆粘结强度的影响

目的探讨不同表面处理和不同粘结剂对氧化锆粘结强度的影响。方法将氧化锆分别制成直径为12.0mm和4.0mm的瓷片,各120个,分别随机分成12组。粘结剂选用磷酸锌粘结剂、聚羧酸锌粘结剂、BifixQM和Super-Bond CB。对氧化锆的表面分别进行不处理、喷砂、硅烷化、先喷砂后硅烷化处理。用上述4种粘结剂将4.0mm瓷片粘结在12.0mm瓷片上,置于37℃蒸馏水中保存24h后,进行剪切粘结强度测试。结果粘结剂相同时,不同表面处理时的粘结强度有显著统计学差异(P0.01),由小到大依次为不处理喷砂硅烷化先喷砂后硅烷化处理;表面处理相同时,不同粘结剂之间的粘结强度有显著统计学差异(P0.01),由小到大依次为磷酸锌粘结剂聚羧酸锌粘结剂Bifix QMSuper-Bond CB。结论粘结剂相同时,表面处理提高了粘结强度。Super-Bond CB的粘结强度比较理想。使用Super-Bond CB时,喷砂后硅烷化处理是一种比较理想的表面处理方法。

Effect of surface conditioning methods on the bond strength of luting cements to zirconia

Objective To investigate the effect of surface conditioning methods on the bond strength of luting cements to zirconia.Methods A total of 120 big discs(12.0 mm in diameter) and 120 small discs(4.0mm in diameter) of zirconia were randomly divided into 12 groups,with each group including 10 big and 10 small discs.Four luting agents were chosen,zinc phosphate cement,zinc polyacrylate cement,Bifix QM,Super-Bond C&B.The surface of ZrO2 was treated differently,not treated,sandblasted,silica-coating or sandblasted followed by silica-coating.The small discs were cemented to the big discs by use of the four luting agents,and then put into the distill water at 37℃ for 24 h.Results The bond strength was significantly different with different treatment and the same luting agent(P<0.01),from low to high: not treated,sandblasted,silica-coating or sandblasted followed by silica-coating.With the same treatment and different luting agent,the bond strength low to high was zinc phosphate cement,zinc polyacrylate cement,Bifix QM,Super-Bond C&B(P<0.01).Conclusion Surface treatment could improve the shear bond strength of cements to ZrO2.With the same surface conditioning method,shear bond strength of Super-Bond C&B to ZrO2 was higher than that of the other three studied.