使用硅酸盐水泥模拟矿物三氧化物聚合物评估不同根尖屏障制备技术的体外研究  

Evaluate different placement technique of mineral trioxide aggregate using portland cement: an in vitro study

作　　者：王茹燕[1,2] 宋颖[3] 黄定明[1] 高原[1] 

机构地区：[1]口腔疾病研究国家重点实验室华西口腔医院牙体牙髓病科(四川大学),成都610041 [2]苏州市立医院北区口腔科,苏州215008 [3]重庆医科大学附属口腔医院牙体牙髓病科,重庆400015

出　　处：《国际口腔医学杂志》2016年第1期8-12,共5页International Journal of Stomatology

基　　金：国家自然科学基金(81200781)~~

摘　　要：目的使用硅酸盐水泥模拟矿物三氧化物聚合物(MTA)评估不同根尖屏障制备技术的边缘封闭性和密实度,以及是否使用输送器对根管壁上充填材料残留量的影响。方法建立大根尖孔和喇叭状根尖孔直根管标准模型,根据在2种模型中充填放置硅酸盐水泥的方法不同分为牙胶组、Endo Activator组、直接超声组和间接超声组,使用体视显微镜观察评分;另在直根管模型中,使用输送器和垂直加压器2种工具将MTA放到根管尖部,在体视显微镜下观察分析。结果在牙胶组中,大根尖孔直根管充填质量优于喇叭口根管(P<0.05);在直根管中,间接超声组和牙胶组密实度高于另外两组(P<0.05),使用输送器比垂直加压器输送MTA残留在根管壁上的少(P<0.05);在喇叭口根管中,间接超声组密实度最高(P<0.01)。结论使用输送器能减少残留在根管壁上的MTA量,在直根管中,可以选择牙胶法和超声法放置屏障材料;而在喇叭口的根管中放置屏障材料时,最佳选择是间接超声法。Objective To evaluate the effect of four different placement techniques on the edge sealing and compactness of mineral trioxide aggregate（MTA） using Portland cement（PC）, and the impact of using conveyor on residual materials on the root canal wall. Methods Established large apical straight root canal model and trumpet-shaped straight root canal model. Using four different placement techniques（Gutta-percha, EndoActivator, direct ultrasonic and indirect ultrasonic） placement PC in two models. Then they were observed and scored under a stereomicroscope. Using delivery and plugger transport PC into large apical root canal model, then the PC that residual on the root canal wall was measured. Results In gutta- percha group, large apical root canal was great than trumpet-shaped straight root canal（P〈0.05）. In large apical root canal, indirect ultrasonic and gutta-percha were great than the other two（P〈0.05）. And the residual MTA on the root canal wall using delivery was less than plugger（P〈0.05）. In trumpet-shaped straight root canal, indirect ultrasonic was great than the other three（P〈0.01）. Conclusion It can decrease MTA that residual on the root canal wall by using delivery, When place MTA in large apical root canal, gutta-percha and indirect ultrasonic are both good choice, while indirect ultrasonic is the best choice in trumpet-shaped straight root canal.

关 键 词：矿物三氧化物聚合物 根尖屏障 超声器械 

分 类 号：R781.05[医药卫生—口腔医学]