HERO642镍钛锉预备弯曲根管临床应用探究.docVIP

HERO642镍钛锉预备弯曲根管临床应用探究[摘要] 目的：评价HERO642镍钛锉预备磨牙弯曲根管的临床疗效。方法：将245颗具弯曲根管需行根管治疗的磨牙随机分为两组，HE组用HERO642镍钛锉及冠根向深入法预备根管，SS组用K锉及逐步后退技术预备根管。两组均采用侧向加压充填法充填根管，通过术前、术后的X线牙片评价根管预备与根管充填的效果。结果：HE组比SS组操作时间明显短、术后疼痛发生率低且程度轻、根管适充率高（P＜0.01）。结论：HERO642镍钛锉在弯曲根管预备方面有明显的优越性，是值得推广的新型根管预备技术。 [关键词] 根管预备；弯曲根管；HERO642镍钛锉 [中图分类号]R781 [文献标识码] B[文章编号] 1673-7210（2009）01（c）-121-02 Clinical study of HERO642 nickel-titanium files in preparation of curved molar root canals QIN Yong, ZHANG Jing (Department of Stomatology, Weifang Government′s Hospital, Weifang 261061, China) [Abstract] Objective: To evaluate the effect of HERO642 nickel-Titanium files in preparation of curved root canals．Methods: 245 molar teeth with curved root canals were randomly divided into 2 groups, HE group was prepared by HERO642 nickel-Titanium files with crown-down technique． SS group was by prepared by K-files with step-back technique． All canals were obturated using lateral condensation technique． The efficiency of preparation and obturation of root canals was analyzed with radiographs before and after operation. Results: Compared with group SS, group HE had shorter operation time, lower post treatment pain, and the original curvature were maintained well（P＜0.01）． Conclusion: HERO642 nickel-Titanium files can be advocated as a new instrumentation technique, especially for those curved molar root canals． [Key words] RCT; Curved root canal; HERO642 nickel-Titanium files 根管预备是根管治疗术中最关键的一个步骤，传统的不锈钢器械由于其固有的硬度和刚度，易造成根管偏移、台阶或肘部等不良形态，且预备效率低。HERO642镍钛器械具有超弹性和良好的抗扭断性，是近年来备受瞩目的根管预备器械。本研究将HERO642镍钛锉用于磨牙的弯曲根管预备，评价其预备效果和临床疗效。 1 资料与方法 1.1临床资料 以2007年9月～2008年9月来我院就诊的初诊患者为本研究的抽样对象。纳入标准：①确诊为牙髓炎和根尖周炎的恒磨牙；②无牙髓治疗史；③根尖孔发育完全且根管通畅，无根管钙化阻塞；④患者知情同意，配合治疗；⑤具有弯曲根管，并按Schneider法测量根管弯曲度[1]，并确定根管弯曲度＞10°。排除标准：①牙纵折；②松动Ⅱ度以上；③患者不合作；④严重全身性或系统性疾病。按此标准选择患牙，按就诊顺序随机分为两组。试验组：120个弯曲根管，HERO642镍钛器械冠向下技术(crown-down technique)预备根管，简称HE组；对照组：125个弯曲根管，手用不锈钢K锉逐步后退技术(step-back technique)预备根管，简称SS组。经统计学分析，两组病例在性别、年龄及牙位构成上均无显著性差异（P0.05）。 1.2 治疗方