机用镍钛锉去除根管旧充填物能力的体外研究  

A study on endodontic retreatment effectiveness of 0.04 taper nickel-titanium rotary profiles in vitro

作　　者：赵宝红[1] 张成飞[1] 林琼光[1] 

机构地区：[1]北京大学口腔医学院特诊科,100081

出　　处：《现代口腔医学杂志》2001年第5期357-358,共2页Journal of Modern Stomatology

摘　　要：目的　研究 0 .0 4锥度的镍钛锉去除根管旧充填物的能力。方法　将 30颗单根管前牙分成A、B、C三组 ,每组 10颗。用K型锉行根管颈备、牙胶尖 +氧化锌侧压法充填。放置 30天后用不同的方法去除根管旧充填物 :A组为K型锉 +氯仿组 ;B组为镍钛锉 +氯仿组 ;C组为单纯应用镍钛锉组。记录操作时间、氯仿用量。将牙根纵劈 ,立体镜下观察牙根整体及其不同水平的残留物情况 ,将结果进行统计学分析。结果　对于根管整体的残留物量 ,C组少于A组 ,存在显著性差异 (P =0 .0 0 7) ,其余的实验组间无显著性差异 (P >0 .0 5 )。对于操作时间 ,B、C两组均少于A组 (P <0 .0 5 ) ,B、C两组间无显著性差异 (P >0 .0 5 )。B组的氯仿用量少于A组 (P <0 .0 5 )。结论　同K型锉相比 。Objective To study the retreatment effectiveness of .04 taper nickeltitanium rotary profiles.Methods Thirty extracted single-rooted anterior teeth were distributed into three groups,10 of each.They were instrumented and obturated with gutta-percha/ZOE's sealer using lateral condensation.Retreatment of group A was done by K files with chloroform,group B using nickel-titanium rotary profiles and chloroform,group C using profile alone.The time of the retreatment and the volume of chloroform were recorded.The teeth were then split longitudinally into halves.The remaining gutta-percha/sealer were visually scored with light microsecpe.Results The mean score in group C was lower than group A (P=0.007).The time of retreatment in group B and C were significantly shorter than group A (P< 0.05 )?The amount of chloroform in group B was significantly less than group A (P< 0.05 ).Conclusion The retreatment effectiveness of 0.04 taper nickel-titanium rotary profiles is better than K files.

关 键 词：镍钛锉 根管再治疗 根管预备 

分 类 号：R781.05[医药卫生—口腔医学]