树脂黏结剂黏结铸瓷基底微渗漏的研究

Microleakage of various cementing agents for casting ceramics

目的:评价2种树脂类黏结剂对IPS Empress2铸瓷基底微渗漏的影响。方法:选择无龋坏的人类前磨牙16颗,随机分为2组,每组8颗。常规制作V类瓷嵌体。第1组用RelyX Unicem进行黏结,第2组用Variolink2进行黏结。所有样本在37℃蒸馏水中储存24h,冷热循环500次后,对试件进行染色实验,在体视显微镜下记录染色情况,采用SPSS11.0软件包对结果进行统计学分析。结果:2种树脂黏结剂黏结IPS Empress2铸瓷基底的微渗漏现象在釉质界面均好于牙本质界面(P<0.05),但Variolink2黏结组和RelyX Unicem黏结组的微渗漏差异无统计学意义。结论:Variolink2和RelyX Unicem黏结IPS Empress 2铸瓷基底在牙本质和牙釉质界面具有不同的抗微渗漏性能,但2种黏结剂之间无统计学差异。

PURPOSE：To observe and compare the microleakage of different composite resin cement systems for IPS Empress 2 ceramics base.METHODS：Sixteen healthy non-carious human molars were selected in the study.Class Ⅴ ceramic inlay was prepared by IPS Empress 2 ceramics.The samples were divided into two groups,eight in each group.RelyX Unicem and Variolink 2 were used for bonding respectively in 2 groups.All specimens were stored in water at 37℃ for 24 hours,then the specimens were subjected to 500 thermocycles ranging from 5℃ to 55℃.Eight specimens in each group were evaluated by dye penetration.The microleakage was examined with light microscope.Statistical analysis was performed with SPSS11.0 software package.RESULTS：Enamel margins exhibited lower leakage than dentin margins by using two cementing agents for casting ceramics （P〈0.05）.The depth of dye for Variolink 2 and RelyX Unicem at enamel and dentin was not significantly different （P〉0.05）.CONCLUSIONS：The microleakage of Variolink 2 and RelyX Unicem for IPS Empress 2 ceramics base has similar sealing abilities.