【作者】 杨晓晓； 韩建民； 赵宁； 姚如永； 孙慧斌；

【Author】 YANG Xiaoxiao;HAN Jianmin;ZHAO Ning;YAO Ruyong;SUN Huibin;Department of Stomatology,Affiliated Hospital of Qingdao University;Materials Science Laboratory,Peking University School of Stomatology;KEEN Dental Hospital;Central Laboratory,Affiliated Hospital of Qingdao University;

【机构】 青岛大学附属医院口腔科； 北京大学口腔医院材料学实验室； 上海可恩口腔医院； 青岛大学附属医院中心实验室；

【摘要】 目的:比较4种冲洗剂及冲洗剂组合冲洗桩道后对纤维桩粘接强度的影响,为临床应用提供理论参考依据。方法:搜集60颗单根管离体牙常规根管治疗及桩道预备后随机分为4组,分别采用4种冲洗剂及冲洗剂组合对桩道进行冲洗。A组:3%过氧化氢溶液,B组:5.25%次氯酸钠溶液、17%EDTA溶液交替冲洗,C组:0.2%氯己定溶液,D组:17%EDTA溶液,每组冲洗剂处理后蒸馏水超声荡洗。从4组中分别随机选取10颗牙齿进行纤维桩粘接,通过推出试验测试各组的粘结强度。在扫描电镜下观察各组余留5颗牙桩道表面牙本质微观形态。结果:A、B、C、D组粘接强度分别为11.93±2.59、15.87±1.79、15.03±2.85、19.24±2.87(A vs B,P<0.01;A vs C,P<0.01;A vs D,P<0.01;B vs C,P>0.05;B vs D,P<0.01;C vs D,P<0.01).扫描电镜观察A组牙本质小管绝大多数被堵塞,牙本质表面大量碎屑;B组牙本质小管均开放,管周呈白恶色;C组多数牙本质小管被部分堵塞,牙本质表面无碎屑;D组牙本质小管均开放,表面呈云雾状。结论:17%EDTA溶液是一种有效的桩道冲洗剂,在纤维桩修复临床工作中应用可以获得良好的粘接效果。更多还原

【Abstract】 Objective:To evaluate the push out bond strength between fiber posts and radicular dentin surface after treating the intra radicular post space with different irrigants and make good reference for clinical practice.Methods:60 Single-rooted extracted human teeth were used in this study.After root canal therapy(RCT),post spaces were prepared,the samples were allocated to 4 groups randomly.Group A:Specimens were irrigated with hydrogen peroxide.Group B:Specimens were irrigated with 5.25%) sodium hypochlorite(NaClO) and 17%ethylene diamine tetra acetic acid(EDTA).Group C:Specimens were irrigated with 0.2%chlorhexidine(CHX).Group D:Specimens were irrigated with 17%EDTA.10 Teeth were selected from each group randomly and self-adhesive resin cement was used to lute the fiber-reinforced posts.The bond strength was evaluated by the push-out bond strength test.The surface of the post space was observed under stereomicroscope(SEM).Results:The bound strength of group A、B、 C and D was 11.93±2.59、 15.87±1.79、15.03±2.85 and 19.24±2.87 respectively(A vs B,P<0.01;A vs C,P<0.01;A vs D,P<0.01;B vs C,P>0.05;B vs D,P<0.01;C vs D,P<0.01).SEM observation showed the majority of dentinal tubules in group A were blocked with a large amount of debris on the dentinal surface.In group B,the dentinal tubules were all open,with white color around the tubules,and most dentinal tubules in group C were partially blocked without debris on the dentinal surface.The dentinal tubules of group D were all open with cloudy surface.Conclusion:EDTA is an effective cleaning agent,in order to improve bound strength of fiber post,should be applied in the clinical work.更多还原