三种甲基丙烯酸树脂类封闭剂根管封闭性能的研究  

Sealing properties of three resin-based sealers

作　　者：麦穗[1] 武诗语 古丽莎[1] 亓益品[1] 孙秋榕 凌均棨[1] 

机构地区：[1]中山大学光华口腔医学院·附属口腔医院牙体牙髓科·广东省口腔医学重点实验室,广州510055

出　　处：《中华口腔医学杂志》2014年第11期672-676,共5页Chinese Journal of Stomatology

基　　金：国家自然科学基金（81100743）;广东省研究生创新培养计划（sybzzxm201110）;广东省科技计划（2013B051000031）

摘　　要：目的 评价3种甲基丙烯酸树脂类封闭剂对根方牙本质的封闭性能,为不同封闭剂的临床应用和选择提供参考依据.方法 镍钛器械ProTaper冠向下法预备48个单根管牙至F3,分别采用A（EndoREZ）、B（RealSeal）、C（RealSeal SE）3种封闭剂行热牙胶垂直加压充填（分别为A、B、C组,每组16个样本）,模拟临床上行完善根管治疗的牙齿.每组10个样本进行液体动力实验测试其微渗透流量,3个样本行扫描电镜观察距根尖5 mm处横截面的微观形态,3个样本行透射电镜观察距根尖5 mm处横截面的超微结构.结果 A、B、C组的微渗漏流量分别为（2.61±0.60）、（1.43±0.11）和（1.76±0.18） μl/min.扫描电镜结果显示：各组封闭剂与根管壁间缝隙区域按B、C、A组顺序递增.透射电镜结果显示：A组封闭剂下方未见明显的脱矿牙本质区,玷污层未完全去除;B组封闭剂下方形成部分脱矿牙本质区,玷污层已去除;C组封闭剂下方形成部分脱矿牙本质区,玷污层大部分去除.结论 在3种甲基丙烯酸树脂类封闭剂中,封闭剂B具有较好的封闭性能,其次为封闭剂C,最后是封闭剂A.Objective To evaluate the sealing properties of three resin-based sealers,EndoREZ,RealSEAL and RealSEAL SE.Methods Forthy-eight extracted human anterior teeth with single root and canal were prepared using ProTaper files with crown-down technique to F3.The teeth were filled with three sealer respectively with hot gutta-percha vertical condensation technique simulating the clinical situation.Leakage quantity was detected using computerized fluid filtration meter with 10 samples in each group.The cross section morphology of apical parts of roots of 5 mm was observed with scanning electron microscope and transmission electron microscope in 3 samples of each group,respectively.Results The leakage quantity of EndoREZ,RealSEAL and RealSEAL SE were （2.61 ± 0.60）,（1.43± 0.11） and （1.76 ± 0.18） μl/min,respectively.The gaps between the the sealer and the canal wall were increased in in order of RealSEAL,RealSEAL SE and EndoREZ.No obvious demineralized dentin under EndoREZ and the smear layer was not completed removed.The partly demineralized dentin was observed under RealSEAL and the smear layer was totally removed.The partly demineralized dentin was seen under RealSEAL SE and the majority of smear layer was removed.Conclusions Among the three resin-based sealers,RealSEAL has the best sealing properties,followed by RealSEAL SE and EndoREZ.

关 键 词：丙烯酸树脂类 牙科材料 封闭性 微渗漏 

分 类 号：R783.1[医药卫生—口腔医学]