Abstract:

Abstract：Objective To evaluate the sealing ability of mineral trioxide aggregate（MTA）and resinous inlay in repairing the large area of molar furcal perforation. Methods Totally 70 freshly extracted molars were selected in 2013 from March to June in Department of Stomatology，Fujian Provincial Hospital，and they were divided into two experiment groups A and B（n = 30），and one control group（n = 10）. Cylindrical shaped cavity with diameter more than 3 mm in the furcal perforation in experiment groups. Perforations were not made in control group. Group A and B were repaired with MTA and resinous inlay. The furcal appearances were evaluated under stereomicroscope after repairing；micro-leakage was measured by glucose oxidase detection. Results The fineness rate of furcal appearances in group A was 36.7%，group B 83.3%. There were statistical difference between group A and B in fineness rate（χ2 = 6.79，P < 0.05）. During the experiment，there were statistical difference between group A and B in the average daily sealing ability（P < 0.05）. Conclusion The resinous inlay is better than MTA in repairing the large area of molar furcal perforation.

Key words: molar furcation, inlay, mineral trioxide aggregate, sealing ability

摘要：

目的 评价无机三氧化物聚合体（MTA）与树脂嵌体修复磨牙大面积髓室底穿孔的封闭性能。方法 收集2013年3—6月在福建省立医院口腔科新鲜拔除的人恒磨牙70颗，分为A、B、C组，其中A、B组各30颗，C组（作为对照）10颗。A、B组制备直径≥ 3 mm的髓室底穿孔，其中A组采用MTA修复髓室底穿孔，B组采用树脂嵌体修复；C组只开髓不制备穿孔。显微镜下观察各组的根分叉形态，采用葡萄糖氧化酶-蒽酮法检测各组的微渗漏情况，评价修复效果。结果 A组修复髓室底穿孔的形态恢复优良率为36.7%，B组为83.3%，两组差异有统计学意义（χ2 = 6.79，P < 0.05）；不同时间点A、B组的日均葡萄糖渗漏量差异均有统计学意义（均P < 0.05）。结论 树脂嵌体对磨牙大面积髓室底穿孔的修补效果优于MTA直接充填。

关键词: 髓室底穿孔, 嵌体, 无机三氧化物聚合体, 封闭性能