硫酸钙作为屏障材料修补根分叉穿孔的效果观察  

Use of Calcium Sulfate as Internal Matrix to Repair Furcal Perforations

作　　者：邹玲[1] 尹仕海[2] 刘钧[2] 谭静[1] 李灏来[2] 

机构地区：[1]口腔生物医学工程教育部重点实验室 [2]四川大学华西口腔医院牙体牙髓科,四川成都610041

出　　处：《华西口腔医学杂志》2006年第4期309-311,共3页West China Journal of Stomatology

摘　　要：目的评估硫酸钙作为屏障材料修补根分叉穿孔后对髓底形态及封闭性的影响。方法收集65颗髓底完整的离体恒磨牙,常规开髓,除阴性对照组5颗外,其余60颗牙用3号球钻于根分叉处预备穿孔,并随机分为4个实验组,分别用①银汞合金,②硫酸钙加银汞合金,③可乐丽菲露,④硫酸钙加可乐丽菲露修补髓底穿孔。手术显微镜下观察髓底形态,并在建立葡萄糖定量分析微渗漏模型后,分别于修补后第1、2、4、7、10、15、20天检测从髓底穿孔处漏出的葡萄糖浓度,检测方法为葡萄糖氧化酶法(GOD)。结果使用硫酸钙后,银汞合金和可乐丽菲露的悬突形成率和微渗漏都有不同程度减小,采用可乐丽菲露修补穿孔的③④组在1周后微渗漏的差异有统计学意义(P<0.05);而采用银汞合金修补穿孔的①②组微渗漏的差异无统计学意义(P>0.05)。结论硫酸钙作为屏障材料有助于提高根分叉穿孔修补的封闭性,并能减少悬突形成。Objective To evaluate the effect of internal matrix on sealing ability and furcal appearance of perforations repair with amalgam and resin. Methods Perforations created in the pulpal floor of human extracted molars were repaired as follows： Amalgam, amalgam plus calcium sulfate, light-cured resin, and resin plus calcium sulfate （15 teeth/group）. The furcal appearance of samples was evaluated under an operating microscope after repair. With the leakage test device, coronal 1 mol/L glucose solution was forced toward the pulpal floor. Leakage was measured by the concentration of leaked glucose in bottom reservoir at 1, 2, 4, 7, 10, 15 and 20 days with enzymatic glucose oxidase method. Results No significant difference was found between group 1 and group 2（P〉0.05）. Leakage in group 4 was obviously lower than group 3 （P〈0.05） after the 7^th day. Conclusion Calcium sulfate significantly improved the sealing effect of resin and provided successful barriers against its overextension.

关 键 词：硫酸钙 屏障材料 穿孔修补 葡萄糖氧化酶法 

分 类 号：R781.05[医药卫生—口腔医学]