三种材料制作椅旁CAD/CAM嵌体的微渗漏比较

Comparison of microleakage of chairside CAD/CAM inlays fabricated by three different materials

目的:比较使用3种材料制作的椅旁计算机辅助设计与辅助制作(CAD/CAM)嵌体微渗漏的大小。方法:收集前磨牙30颗,随机分为3组,每组10颗,制备Ⅱ类洞,使用椅旁CAD/CAM行嵌体修复,A组为Vita Enamic组,B组为Lava Ultimate组,C组为IPS e.max CAD组。经冷热循环后观察轴壁及龈壁微渗漏情况。结果:3组嵌体在轴壁处微渗漏程度存在显著差异(P<0.05),两两对比,A组显著小于B组(P<0.05),其余比较无显著差异(P>0.05);龈壁处微渗漏无显著差异(P>0.05)。A组及C组轴壁处微渗漏均显著小于同组龈壁处微渗漏(P<0.05),B组则无显著差异(P>0.05)。结论:Vita Enamic作为嵌体修复材料有较好的封闭性。

Objective:To compare the microleakage of chairside computer-aided design and computer-aided manufacture(CAD/CAM)inlays made with three kinds of materials.Methods:Thirty extracted premolars were randomly divided into 3 groups(10 teeth in each group),and standardized ClassⅡcavities were made.Each group was restored with standardized chairside CAD/CAM-fabricated inlays using Vita Enamic for group A,Lava Ultimate for group B,and IPS e.max CAD for group C.After thermocycling,the staining of the occlusal and gingival margins was observed.Results:There were significant differences in the degree of microleakage of inlays at the occlusal margin among the three groups(P<0.05).Pairwise comparison showed that group A was significantly less than that in group B(P<0.05),and there was no significant difference between group A and C or between group B and C(P>0.05).There was no significant difference in microleakage at the gingival margin among all groups(P>0.05).The microleakage at the occlusal margin of group A and group C was significantly less than that at the gingival margin of the same group(P<0.05)respectively,but there was no significant difference at the occlusal and gingival margin in group B(P>0.05).Conclusion:This experiment suggests that Vita Enamic has better sealing property as an inlay repair material.