目的:比较2 种不同贴面材料与3 种不同的瓷贴面粘接系统粘接后的粘接强度.方法:应用3 种不同的瓷贴面粘接系统(Panavia F、Variolink Veneer、Rely X Veneer),将经过相同处理的离体牙和2 种不同的贴面材料(IPS e.max铸瓷和CERAMAGE聚合瓷)粘接,每组中随机选取一半试件(n=8)37 ℃水浴24 h,另一半(n=8)冷热循环5 000 次后测试其剪切强度,电镜下观察断裂模式.结果:IPS e.max铸瓷组和CERAMAGE聚合瓷组中Variolink Veneer粘接系统在37 ℃水浴24 h后或5 000 次冷热循环后都表现出了最高的粘接强度(P<0.05),所有试件在经过5 000 次冷热循环后的粘接强度除Panavia F组外都有明显下降.结论:对于IPS e.max铸瓷和CERAMAGE聚合瓷,Variolink Veneer粘接系统的粘接强度高于Panavia F和Rely X Veneer粘接系统.%Objective: To study the bonding strengths of three types of bonding systems to two kinds of veneer materials. Methods: Standard specimens of IPS e. Max cast procelain and CERAMAG polymerized procelain were prepared and cemented with three bonding systems( Panavia F, Variolink Veneer and RelyX Veneer ) respectively. Then each group was subdivided into 2 subgroups( n = 8 ) in which the specimens were treated by 24-hour immersion in 37 °C water and thermocycling of 5 000 cycles respectively. Shear bond strength was determined on an universal testing machine. Fracture mode analysis was performed using SEM. Results: Variolink Veneer showed the greatest bonding strength among the three bonding systems after 24-hour immersion in 37 °C water or thermocycling of 5 000 cycles in the groups of IPS e. Max and CERAMAGE( P <0. 05 ). The bond strength of all groups decreased notably after thermocycling except bonding with Panavia F. Conclusion: The bond strength of Variolink Veneer bonding system is higher than that of Panavia F and RelyX Veneer for the IPS e. Max Press cast procelain and CERAMAGE polymerized procelain.
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