5种手持根管器械预备弯曲人工根管的效果

目的 比较５种手持根管器械的成形能力。方法 用光学显微镜观察５种手持根管器械常规法预备弯曲人工根管后的根管形态变化。结果 所有标本未发现根尖拉开、肘部形成和穿孔。Ｋ－Ｆｌｅｘ组有７５％的标本出现台阶，台阶的出现与在部树脂屑栓的形成有很密切的关系。Ｋ－Ｆｌｅｘ组和Ｈ锉的组的根尖偏移较大，与Ｋ针组比较，有显著性差异，其余各组之间无显著性差异，其余各组之间无显著性差异。结论 通过综合评价５和睥持根管器械

Effect on preparing curved artificial root canal with five handle endodontic instruments II comparision of shaping ability]

OBJECTIVE:To compared the shaping ability of five handle endodontic instruments. METHODS: The canal shape of prepared artificial root canals with five handle endodontic instruments were observed by light-microscope. RESULTS: Apical zips,elbows and perforations were not found. Ledges occurred in speciments of K-Flex group and they were relating to resinous plugs.The apical transportatins were relating to resinous plugs.The apical transportations of K-Flex group and H file group are much greater than other groups. CONCLUSION: Unifile or K file is first choice to prepare curved artificial root canals with routine preparation technique by comprehensive evaluaion of the cutting ability and shaping ability of five handle endodontic instruments.