摘要
目的探讨钴铬合金嵌体修复髓室底穿孔的操作步骤及修复效果。方法收集新鲜拔除的人恒磨牙42颗:其中38颗用8号球钻在髓底中央制备直径2.1 mm的穿孔洞型,随机均分为A、B两个实验组;另外4颗为C组,只开髓不制备髓底穿孔,作阴性对照。A、B两组分别用钴铬合金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粘接。从2个实验组中各随机选4个用扫描电子显微镜观察粘接界面,其余15个样本用葡萄糖氧化酶-过氧化物酶法检测微渗漏。结果 A组微渗漏值在任意时间点均高于B组,但差异无统计学意义(P>0.05),A、B组均对根分叉的外形进行了良好的修复,但扫描电镜下,钴铬合金嵌体的界面宽度小于树脂嵌体。结论在形态学和封闭性方面,钴铬合金嵌体修复磨牙髓室底穿孔效果良好。
Objective To evaluate the effect of furcal perforation treated with cobalt-chrome alloy inlays,including both morphologic and microleakage study.Methods 42 newly extracted human maxillary and mandibular molars were collected.38 of them,perforations were made in the center of the pulp chamber floor by using the 8 high speed round bur,divided randomly into two experimental groups.The other intact 4 sample were used as the negative controls.In the experimental groups,group A were repaired by cobalt-chrome alloy inlays,group B were repaired by indirect composite inlay.Resin reinforced glass ionomer was used in all samples as cement.4 of each group were evaluated under scanning electron microscope（SEM）,and microleakage of others was measured by the concentration of leaked glucose with the oxidase-peroxidase method.Results Microleakage of group A was higher than group B,but no statistical difference（P0.05）.The two groups had reached a good furcation shape. The gap width of group A was less than B group by SEM.Conclusion For repairing furcal perforation,the method of cobalt-chrome alloy inlay is as good as that of indirect composite inlay.
出处
《国际口腔医学杂志》
CAS
2011年第3期261-264,共4页
International Journal of Stomatology
关键词
钴铬合金嵌体
间接树脂嵌体
髓室底穿孔
微渗漏
cobalt-chrome alloy inlay
indirect composite resin inlay
subpulpal wall perforation
microleakage
