ProTaper镍钛器械预备磨牙根管的临床效果

目的评价ProTaper镍钛锉预备磨牙根管的临床效果。方法选取96颗患有牙髓炎的磨牙,随机分为两组,分别使用ProTaper镍钛锉和不锈钢K锉预备根管,使用侧压法充填根管,记录器械分离数和术后疼痛例数,根据X线片评价根管预备效果。结果两组器械预备根管后,ProTaper组根管形态良好率为91.9%,不锈钢K锉组为51.1%,两者差异有统计学意义。ProTaper组术后疼痛反应的比例明显低于不锈钢K锉组（P〈0.05）。两组器械分离数的差异无统计学意义。结论 ProTaper预备磨牙根管的成形效果好,术后疼痛反应少。

Clinical effect of ProTaper NiTi instruments in root canal preparation of molars

Objective To evaluate the clinical effect of ProTaper in preparation of molars′root canals.Methods 96 molars were randomly divided into two groups and prepared by ProTaper and stainless steel K files.All canals were obturated with lateral condensation method.The incidence of instrument seperation and post-operative pain were recorded.The efficiency of preparation was analyzed with radiograph.Results In ProTaper group,91.9% of the canals were achieved continuous funnel shapes after preparation,while 51.1% of the canals were achieved in stainless steel K files group.The difference between two groups was statistically significant.There was more post-operative pain in the stainless steel K files group than in the ProTaper group（P0.05）.There was no statistically significance of instrument seperation between two groups.Conclusion ProTaper performed good shaping ability in molars′ root canals and generated less post-operative pain.