摘要/Abstract

摘要： 目的·探索机用镍钛M3 PRO和MTwo系统对根管的临床应用效果。方法·以机用镍钛M3 PRO系统组、机用镍钛MTwo 系统组为试验组，手动不锈钢K锉组为对照组，取人离体下颌第一恒磨牙中度弯曲的近中根管90个，随机分为3组。以机用镍钛M3 PRO和MTwo系统中的10/04锉、手动不锈钢K锉中的10锉为疏通锉进行根管疏通，采用标准技术法进行根管预备至25锉。记录3组锉的疏通、预备时间和测量根管工作长度变化，采用单因素方差分析（ANOVA）及LSD-t检验比较组间差异。结果·根管疏通预备时间：MTwo组时间最短，M3 PRO组时间最长；2组比较，差异有统计学意义（P0.001）。根管成形预备时间：M3 PRO组时间最短，K组最长，MTwo组、M3 PRO组均显著少于K组（P0.004，P0.001），但MTwo组和M3 PRO组比较差异无统计学意义（P0.573）。根管预备总时间：MTwo组时间最短，K组最长，MTwo组、M3 PRO组与K组之间比较，差异有统计学意义（P0.004，P0.033），MTwo组和M3 PRO组比较，差异无统计学意义（P0.451）。根管工作长度改变：3组之间比较差异均有统计学意义（P0.037，P0.037，P0.000)，其中M3 PRO组改变最小，K组改变最大。结论·机用镍钛MTwo系统的10/04锉疏通根管效率高，机用镍钛M3 PRO系统对根管工作长度改变的影响更小；在根管预备总时间差异不大的情况下，机用镍钛M3 PRO系统更适合用于中度弯曲根管。
关键词: 机用镍钛系统, 中度弯曲根管, 恒磨牙, 疏通, 根管成形
Abstract:
Objective · To evaluate the clinical application effect of two nickel-titanium engine driven systems on moderate curved root canals. Methods · Ninety mesial root canals with moderate curvature of extracted human first mandibular permanent molar were randomly divided into three groups: M3 PRO Group, MTwo group and K group. The glide path was firstly preparedusing 10/04 file in M3 PRO group and MTwo group and 10 file in K group respectively .Then the preparation of root canals up to 25 was performed according to the instruction manual in each different group using standardized technique. All data including time required in glide path preparation, shaping preparation, total root canals preparation and changes of working length in root canal were recorded and analyzed statisticallyusing Analysis of Variance (ANOVA) and LSD-t tests (PResults · Root canal glide path preparation time: MTwo group showed significantly less preparation time while M3 PRO group exhibited significantly the longest preparation time. There was significant difference between MTwo group and M3 PRO group (P0.001). Root canal shaping preparation time: M3 PRO group showed significantly less preparation time while K group exhibited significantly the longest preparation time. Both MTwo group and M3 PRO group showed significantly less preparation time than K group (P0.004, P0.001), but there was no significant difference between MTwo group and M3 PRO group (P0.573). Total root canal preparation time: MTwo group showed the shortest time while K group exhibited the longest time. There were significant differences between MTwo group, M3 PRO group and K group （P0.004, P0.033), but no significant difference between MTwo group and M3 PRO group (P0.451). Changes of root canal working length: There were significant differences among the three groups (P0.037, P0.037, P0.000). M3 PRO group showed a minimal change while K group exhibited significant changes. Conclusion · MTwo nickel-titanium engine driven system with 10/04 file preform a high efficiency in glide path preparation, whilst M3 PRO nickel-titanium engine driven system show less changes in working length. Under the circumstancesthe total time required for root canal preparation is not significant, M3 PRO nickel-titanium engine driven system is more suifor root canal preparation in moderate curved root canals.
Key words: nickel-titanium engine driven system, moderate curved root canals, permanent molar, glide path, root canal shaping ability


PDF全文下载地址:

点我下载PDF