IPS e.max Press铸瓷嵌体修复磨牙髓室底穿孔的体外研究

In vitro study of furcal perforation repaired with IPS e.max Press cast porcelain inlays

目的:探讨IPS e.max Press铸瓷嵌体修复髓室底穿孔的操作步骤及形态恢复与封闭效果。方法:38个人恒磨牙用#8球钻在髓底中央制备髓底穿孔模型,随机均分A、B 2个实验组;4个人恒磨牙只开髓不制备髓底穿孔为C组作阴性对照。A、B 2组分别用IPS e.max Press铸瓷嵌体和间接树脂嵌体修复髓底穿孔,并使用树脂加强型玻璃离子进行黏结。从A、B 2个实验组中各随机选4个用SEM观察黏结界面,其余15个样本用葡萄糖氧化酶-蒽酮法检测微渗漏。结果:A组微渗漏值低于B组,但无统计学差异(P>0.05),两组对根分叉外形修复均达到了良好效果,但SEM观察A组的间隙宽度明显小于B组。结论:IPS e.max Press铸瓷嵌体修复磨牙髓室底穿孔在形态学和封闭性方面优于树脂嵌体。

AIM： To evaluate the effect of IPS e.max Press ceramic inlays on furcation perforation repaiv by both morphologic and microleakage study.METHODS： Perforations were made in the center of the pulp chamber floor in 38 human molars using the #8 round bur.The molars were then randomly divided into A and B experimental groups.4 intact teeth were used as negative controls（Group C）.Group A was repaired by IPS e.max Press ceramic inlays,Group B was repaired by composite resin inlay,While group C remained intact as negative control.Resin reinforced glass ionomer was used in both groups as sealer.Sections of 4 teeth in group A and B were evaluated under scanning electron microscope（SEM）,others were used in leakage detection device to measure the concentration of leaked glucose with the enzymatic GOD POD method.RESULTS： No significan difference of microleakage was found between Group A and Group B（P0.05）.SME observation showed that both groups reached nice morphological restoration.The gap width between porcelain and dentin in group A was less than that in Group B under SEM.CONCLUSION： IPS e.max Press ceramic inlays is superior to composite resin inlay in improving the sealing ability and morphological restoration when used for repair of furcation perforations.