【摘要】 目的：比较Ｋ－Ｆｌｅｘ和Ｕｎｉｆｉｌｅ用常规预备弯曲人工根管的切削能力和根尖偏移。方法：用电子分析天平称量Ｋ－Ｆｌｅｘ和Ｕｎｌｆｉｌｅ预备弯曲人工根管后的标本失重量及在光学显微镜下测量Ｋ—Ｆｌｅｘ和Ｕｎｉｆｉｌｅ预备弯曲人工根管后的根尖偏移。结果： Ｋ－ Ｆｌｅｘ和 Ｕｎｉｆｉｌｅ的切削能力比较无显著性差异（Ｐ＞ ０．０５），根尖偏移随着锉号的增大而增大，２５＃锉之前，两组之间的根尖偏移非常接近，但３０＃锉以后，Ｋ－Ｆｌｅｘ组的根尖偏移明显增大。结论：Ｕｎｉｆｉｌｅ用常规法预备弯曲人工根管的效果优于Ｋ—Ｆｌｅｘ。更多还原

【Abstract】 Objective: The cutting ability and apical transportation of curved artificial root canals, which were prepared by routine preparation technique with K - Flex or Unifile, were compared. Methods: The specimen weight loss following serial preparation of artificial root canal was measured with electronic analysis balances and the apical transportation was measured under microscope. Results: The cutting abilities of K - Flex and Unifile were not significant different(P > 0.05 ). The larger the file was, the greater the apical transportation was. Before using 25~ # file, the apical transportations of two groups were very similar. The apical transportation after using 30 ~# K - Flex increased abruptly. Conclusion: The effect of Unifile was superior to that of K - Flex by comparing their cutting abilities and apical transportations of Preparing curved artificial root canals by routine preparation technique.更多还原