CAJ | 학술논문

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.
목적 평개3충갑기병희산수지류봉폐제대근방아본질적봉폐성능,위불동봉폐제적림상응용화선택제공삼고의거.방법 얼태기계ProTaper관향하법예비48개단근관아지F3,분별채용A(EndoREZ)、B(RealSeal)、C(RealSeal SE)3충봉폐제행열아효수직가압충전(분별위A、B、C조,매조16개양본),모의림상상행완선근관치료적아치.매조10개양본진행액체동력실험측시기미삼투류량,3개양본행소묘전경관찰거근첨5 mm처횡절면적미관형태,3개양본행투사전경관찰거근첨5 mm처횡절면적초미결구.결과 A、B、C조적미삼루류량분별위(2.61±0.60)、(1.43±0.11)화(1.76±0.18) μl/min.소묘전경결과현시:각조봉폐제여근관벽간봉극구역안B、C、A조순서체증.투사전경결과현시:A조봉폐제하방미견명현적탈광아본질구,점오층미완전거제;B조봉폐제하방형성부분탈광아본질구,점오층이거제;C조봉폐제하방형성부분탈광아본질구,점오층대부분거제.결론 재3충갑기병희산수지류봉폐제중,봉폐제B구유교호적봉폐성능,기차위봉폐제C,최후시봉폐제A.
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.