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三种根管预备器械临床应用效果比较.doc

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三种根管预备器械的临床应用效果比较   【摘要】目的:对比观察三种根管预备器械的临床应用效果。方法:需行根管治疗的第一磨牙121颗,随机分为M组37例、P组35例、K组38例,三组患牙均采用一次法进行根管治疗。M组:使用Mtwo机用镍钛旋转锉常规法预备根管;P组:使用Protaper手用镍钛锉冠向下法预备根管;K组:使用不锈钢K锉改良逐步后退法预备根管。三组均采用超声治疗仪消毒根管,冷侧压法进行根管充填。结果:根管恰填率M组为93.5%、P组为93.3%、K组为88.4%,M、P组与K组相比, P均<0.05。根管预备时间M组为(235.6±69.7)s/根、P组为(490.1±123.8)s/根、K组为(568.7±167.4)s/根,M组与P、K组相比,P均<0.05。根管治疗术后为M、P、K组出现疼痛者分别为2、3、10牙,M、P组与K组相比, P均<0.05。结论:Mtwo和Protaper预备根管根管成形效果好,根管充填质量高,且术后疼痛发生率低。   【关键词】根管预备;Mtwo机用镍钛旋转锉;Protaper手用镍钛锉;冠向下预备法;改良逐步后退法   【中图分类号】R781.05【文献标识码】A【文章编号】1008-6455(2011)10-0004-02The comparison of clinic effects of three instruments in root canal preparation   Sun Qiong1Zhang Zhihong2Liu Kun1   【Abstract】Objective:To compare the clinic effects of three instruments in root canal preparation. Methods:one hundred and twenty two first molars with pulpitis or periodontitis were selected, and divided randomised into M group;P group and K group with one-time root canal treatment. M group: Crown-down technique was used in root canal preparation; P group: routine preparation technique was used in root canal preparation;K group: modified step-back technique was used in root canal preparation; All the root canals were sterilized by ultrasonic instruments and obturated with lateral condensation method.The efficiency of preparation、quality of obturation and patients’reaction were analyzed after one-time root canal treatment.Results:correct fill-in in M group was 93.5%; in P group was 93.3%; in K group was 88.4%.The average time of root canal preparation in M group(235.6±69.7s/canal) was significantly (P<0.05)shorter than in P group(490.1±123.8s/canal) .The rate of pain post operation in M group(4.9%) and P group(7.9%) were lower than K group(23.8%) was significant(P <0.05). Conclusion:root canals can be prepared and obturated effectively in M group and P group with lower pain rates.   【Key words】Root canal preparation;rotary Ni-Ti instruments Mtwo; hand-used Ni-Ti ProTaper instrument;Crown-down technique;Modified
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