2种可切削玻璃陶瓷树脂粘接强度及耐久性的比较研究

The comparative research on resin bond strength and durability of two machinable glass ceramic

目的评价不同硅烷偶联剂对2种可切削玻璃陶瓷树脂粘接强度及其耐久性的影响。方法 2种含白榴石晶体的可切削玻璃陶瓷A和B表面分别经硅烷偶联剂A、B、C处理后,通过自粘接型树脂粘接剂(G-CEM)与圆柱形复合树脂粘接制成6个粘接实验组。每个实验组的试件分为2个亚组,在冷热循环前或经10 000次冷热循环后接受微剪切粘接强度测量。使用两因素方差分析对测量数据进行统计学处理。结果冷热循环前,偶联剂A处理的陶瓷A的树脂粘接强度显著低于陶瓷B相应实验组的粘接强度(P=0.002),偶联剂C处理后的陶瓷A的树脂粘接强度显著高于偶联剂A和B处理的陶瓷A的树脂粘接强度(P=0.014,P=0.019)。除了偶联剂B处理的陶瓷A组外,冷热循环10 000次后显著降低了所有实验组的粘接强度,3种硅烷偶联剂处理的陶瓷A或B组间粘接强度差异无统计学意义;但硅烷偶联剂B和C处理后的陶瓷B树脂粘接强度显著高于相应的陶瓷A的树脂粘接强度(P=0.003,P=0.027)。结论除了硅烷偶联剂的种类外,玻璃陶瓷的类型也是影响陶瓷树脂粘接强度及耐久性的主要因素。

Objective To evaluate the effect of different silane couplers on bond strength and durability of two machinable glass ceramics to resin cement.Methods Two machinable glass ceramics（A and B） were silanized by three silane couplers（A,B,C）,and were bonded with a resin cement（G-CEM） to form micro-shear test specimens of six groups.The specimens of each group were subdivided into two subgroups,and their micro-shear bond strength was measured before and after 10 000 thermal cycles.Bond strength data were analyzed by two-way ANOVA.Results Before thermal cycles,the bond strength of ceramic A treated by silane coupler A was lower than that of ceramic B（P=0.002）.The bond strength of ceramic A treated by silane coupler C was significantly higher than that treated by silane coupler A and B（P=0.014,P=0.019）.10 000 thermal cycles obviously decreased the bond strength of all groups except the group of ceramic A treated by silane coupler B,and no significant difference was found between three silane coupler with either of two ceramic.However the bond strength of ceramic B treated by silane coupler B and C was significantly higher than that of ceramic A（P=0.003,P=0.027）.Conclusion As well as the types of silane coupler,the type of ceramic could affect their bond strength and durability to resin cement.