| 朱磊,余锦豪,徐远志,尚光伟,唐小山,汪饶饶.FlexMaster镍钛机用器械根管再治疗清理效果的体外研究[J].口腔材料器械杂志,2012,21(2):70-72. |
| FlexMaster镍钛机用器械根管再治疗清理效果的体外研究 |
| In vitro study of the efficacy of FlexMaster NiTi rotary instruments in root canal retreatment |
| 投稿时间：2012-01-14 修订日期：2012-03-23 |
| DOI：10.11752/j.kqcl.2012.02.03 |
| 中文关键词: 镍钛机用器械 手用H型锉 根管再治疗 残留充填物 |
| 英文关键词:NiTi Rotary instrument Hand H files Root canal retreatment Residual filling material |
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| 中文摘要: |
| 目的： 研究FlexMaster镍钛机用器械根管再治疗清理的效果。方法： 选取临床拔除的40颗单根管前牙,用改良式逐步后退法进行根管预备,牙胶尖与碧兰糊剂侧方加压充填根管。放置30d后随机分为两组,A组用H型锉去除根管内旧充填物,B组用FlexMaster镍钛机用器械去除充填物。分别记录操作时间。然后,将牙根纵劈,立体显微镜下观察根管冠1/3、根中1/3和根尖1/3段的残留物情况。结果： 在根管冠1/3处两种方法的根管清理效果无统计学差异(P>0.05)。在根管的中段和根尖段,B组的残留物量较A组少,两组间存在显著性差异(P<0.05)。B组操作时间明显少于A组,两组间也有显著性差异(P<0.01)。结论： 与手用H型锉相比,FlexMaster镍钛机用根管预备器械去除根管旧充填物效果更好,且操作时间显著减少。 |
| 英文摘要: |
| Objective: To study the retreatment effectiveness of FlexMaster NiTi rotary instruments. Methods: 40 extracted single-rooted anterior teeth were divided into two groups,20 in each.They were instrumented by modified stepback flare technique and obdurated with gutta-percha and cortisomol sealer using lateral condensation. Retreatment of group A was performed by H files,group B by using FlexMaster NiTi rotary instruments. The time of retreatment was recorded. The teeth were then split longitudinally into halves. The remaining gutta-percha /sealer on the apical,middle,coronal parts of the root canal walls were visually scored with a stereomicroscope. Results: In the apical and middle sections,less residual filling material was observed in group B than in group A(P<0.05). The mean operating time of group B was significantly less than that of group A. Conclusions: The retreatment effectiveness of FlexMaster is better than that of H files. |
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