【摘要】 目的:评价手用ProTaper镍钛器械预备磨牙根管的临床疗效。方法:选取需进行根管治疗的80颗患有牙髓炎或根尖周炎的磨牙,随机分为两组,A组:使用手用ProTaper镍钛器械,以冠根向深入法预备根管;B组:使用手用不锈钢扩大锉(K-file),以逐步后退法预备根管。两组均使用侧压充填法充填根管。记录根管预备时间、器械折断数量及工作长度变化,根据术前、术中、术后的X线片评价根管预备和充填的效果。结果:A组平均单根管预备时间较B组短,两组差异有统计学意义(P<0.05);A组有一枚S1析断,B组有8枚8#到15#锉尖变形;A组预备根管后工作长度基本无变化,B组平均减少(1.41±0.93)mm(P<0.01);A组预备后根管锥度,流畅度较好,术后疼痛发生少,且程度轻,差异有显著性(P<0.05)结论:手用Pro Taper镍钛器械与传统不锈钢K锉相比可明显提高预备质量,尤其适于弯曲根管的预备,是值得推广的新型手用根管预备技术。更多还原

【Abstract】 Objective: To evaluate clinical effects of hand ProTaper nickel-titanium(Niti) instruments in root canal preparation of molars.Methods:Eighty molars with pulpitis or perioapical periodontitis were randomly classified into two groups with 40 teeth in each group.Root canal preparation was carried out with hand ProTaper and Crown-down technique in Group A,while preparation with ss-k-file and step-back technique in Group B.Preparation time,the number of broken instruments and the change of WL were recorded.The efficiency of preparation and obturation was analyzed with radiograph before,during and after operation.Results:The preparation time of Group A was shorter than that of group B(P<0.05)O.ne S1 was broken in Group A,while 8 pieces of ss-K-file were distorted in Group B.The WL of Group B reduced by(1.41±0.93)mm whereas there was almost no change in Group A(P<0.01).Hand ProTaper could achieve more continuosly tapered root canal shape and less painafter operation than that of ss-K-file(P<0.05).Conclusion:Hand ProTaper instruments can be advocatedas a new hand instrumen-tation technique,especially for those curve root canal of molars.更多还原