两种根管冲洗液对根管壁玷污层去除效果分析

Removal Effect of Two Kinds of Root Canal Rinse Solution on Root Canal Wall Smear Layer

目的:评价7%MA溶液和1%IP6溶液对根管壁玷污层的去除情况,并与17%EDTA溶液的去除效果相比较。方法:将40颗正畸拔出的单根前磨牙随机分成4组(n=10),A组:3%次氯酸钠溶液(根管预备过程中)+17%EDTA溶液(根管预备完成后);B组:3%次氯酸钠溶液(根管预备过程中)+蒸馏水(根管预备完成后);C组:3%次氯酸钠溶液(根管预备过程中)+1%IP6溶液(根管预备完成后);D组:3%次氯酸钠溶液(根管预备过程中)+7%MA溶液(根管预备完成后)。将根管分为根上1/3、根中1/3、根尖1/3,分别使用扫描电镜观察其玷污层的去除情况。结果:对于根管壁中根上1/3、根中1/3玷污层的去除情况,C、D组优于A、B两组(P<0.05),且D组比C组去除玷污层的效果好(P<0.05)。根尖1/3玷污层去除情况差异无统计学意义。结论:7%MA溶液和1%IP6溶液去除根管壁玷污层的效果皆优于17%EDTA溶液,且3%次氯酸钠溶液联合7%MA溶液去除根管壁中根上1/3、根中1/3玷污层的效果最佳。

Objective：The removal of the smear layer of the root canal wall was evaluated by 7% MA solution and 1%IP6 solution,and compared with the removal effect of 17% EDTA solution.Methods：A total of 40 orthodontic single premolars were randomly divided into 4 groups（n=10）,group A：3%sodium hypochlorite solution（root canal preparation）＋17% EDTA solution（after root canal preparation）.Group B：3%sodium hypochlorite solution（root canal preparation process）＋distilled water（after root canal preparation）.Group C：3%sodium hypochlorite solution（root canal preparation process）＋1% IP6 solution（after root canal preparation）.Group D：3% sodium hypochlorite solution（root canal preparation process）＋7% MA solution（after root canal preparation is complete）.The root canal wall was divided into root 1/3,1/3 in the root,root tip 1/3,and the removal effect of the smear layer was observed by scanning electron microscope.Results：For the root canal wall,where root 1/3,1/3 in the root removing the smear layer,C,D groups better than A,B groups（P〈0.05）,and group D is good smear layer removal effect than group C（P〈0.05）.There was no statistical significance in the removal of root tip 1/3 smear layer.Conclusion：7% MA solution and 1%IP6 solution to remove the root canal wall smear layer effect better than 17% EDTA solution.3%sodium hypochlorite solution combined with 7% MA solution to remove the root of root 1/3,1/3 in the root smear layer of the best.