后牙根管预备两种手动方法的临床效果比较

The Comparison Between two Techniques with Hand Instrument in Posterior Teeth's Root Canal Preparation

目的评估后牙根管预备两种手动方法的临床效果。方法选取牙髓炎或根尖周炎的磨牙106例,随机分为步进法组和步退法组,用手动ISO不锈钢K型根管扩孔钻、锉预备根管,比较两组术后根管治疗期间疼痛(EIP)发生情况及根管充填效果。结果步进法组和步退法组EIP的发生率分别为21.15%和42.59%,两组间差异有统计学意义(P<0.05)。根管充填情况差异无统计学意义(P>0.05)。结论步进法手动ISO不锈钢K型根管扩孔钻、锉预备根管的临床效果较步退法佳。

Objective To evaluate the value of two techniques with hand instrument in posterior teeth＇s root canal preparation. Methods 106 molars with pulpal and/or periapical involvement were randomly divided into two groups for root canal preparation, using stainless steel hand files-Flexo-File. One group was treated by stepdown technique, the other group was treated by step-back technique. The incidence and degree of EIP in the two groups were recorded, and root canal filling＇ s shapes were observed. Results In step-down group the incidence of EIP was 21.15% ,while 42.59% of the teeth developed EIP after step-back group. The difference be- tween two groups was statistically significant （ P 〈 0.05）. There was not statistically significance （ P 〉 0.05） in root canal filling＇ s shape between two groups. Conclusion Root canal preparation on posterior teeth with stainless steel hand files by step-down technique generated less EIP.