三种不同材质的嵌体冠修复短冠磨牙的微渗漏对比研究

A comparative study on microleakage of inlay-crown with three different materials on the short coronal molars

目的:采用不同材质嵌体冠对离体短冠磨牙进行修复,通过对比观察微渗漏情况,评估临床修复效果。方法:离体短冠磨牙根管治疗后利用髓室固位制作嵌体冠,分为钴铬合金冠,钴铬合金烤瓷冠,贵金属冠(金钯合金)3组,所有样本浸泡于印度墨水中3周,然后沿近远中向纵行剖开,在体视显微镜下观测微渗漏情况。结果:贵金属冠组微渗漏值小于其它两组,其它两组间无区别。结论:贵金属冠修复在减少微渗漏方面有一定优势。

Objective：To evaluate the restoration effect of inlay-crown with three different materials on the recently extracted molars measured by the degree of microleakage. Method：Three groups of short coronal molars with pulp chamber retention were made after root canal therapy using cobalt-chromium alloy cast crowns,cobalt-chromium alloy ceramics crowns and cast precious metal crowns（gold-palladium alloy） respectively. All above samples were sectioned longitudinally after being immersed in India ink for three weeks.The microleakages were observed using a stereomicroscope. Result：The microleakages of cast precious metal crowns were less than other materials,and there was no difference between cobalt-chromium alloy cast crowns and cobalt-chromium alloy ceramics crowns. Conclusion：The cast precious metal crowns have better performance in reducing microleakages on short coronal molars.