2种贴面材料在不同粘接系统下粘接强度的对比研究

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、RelyX 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CERAM-AGE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RelyXVeneer粘接系统。

Bonding strength of different bonding systems to two types of veneer materials in vitro

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 Rely X Veneer) respectively.Then each group was subdivided into 2 subgroups(n=8) in which the specimens were treated by 24-hour immersion in 37 ℃ 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 ℃ 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 Rely X Veneer for the IPS e.max Press cast procelain and CERAMAGE polymerized procelain.