ProTaper Universal 旋转镍钛锉和 ProTaper 再治疗系统在去除牙胶时根管内碎屑推出量和使用时间的比较。
Comparison of debris extruded apically and working time used by ProTaper Universal rotary and ProTaper retreatment system during gutta-percha removal.
机构信息
University Cruzeiro do Sul, São Paulo, SP, Brazil.
出版信息
J Appl Oral Sci. 2010 Dec;18(6):542-5. doi: 10.1590/s1678-77572010000600002.
Abstract
OBJECTIVE
The aim of this study was to evaluate the in vitro action of ProTaper retreatment files and ProTaper Universal in the retreatment of mandibular premolars.
MATERIAL AND METHODS
The amount of debris extruded apically was measured and the time to reach the working length and to complete the removal of gutta-percha was observed. Thirty teeth had their canals prepared using ProTaper Universal files and were obturated by the single cone technique. The teeth were then stored at 37ºC in a humid environment for 7 days. During the use of the rotary instruments for root canal filling removal, the apical portions of the teeth were attached to the open end of a resin tube to collect the apically extruded debris.
RESULTS
ProTaper Universal files were significantly faster (p=0.0011) than the ProTaper retreatment files to perform gutta-percha removal, but no significant difference was found between the files regarding the time to reach the working length or the amount of apical extrusion.
CONCLUSIONS
ProTaper Universal rotary had better results for endodontic retreatment, and both techniques promote similar apical extrusion of debris.
摘要
目的
本研究旨在评估 ProTaper 再治疗锉和 ProTaper Universal 在下颌前磨牙再治疗中的体外作用。
材料和方法
测量根尖挤出的碎屑量，并观察到达工作长度和完成牙胶去除的时间。用 ProTaper Universal 锉预备 30 颗牙齿的根管，并采用单尖技术进行根管封闭。然后将牙齿储存在 37°C 的潮湿环境中 7 天。在使用旋转器械去除根管填充物时，将牙齿的根尖部分连接到树脂管的开口端，以收集根尖挤出的碎屑。
结果
ProTaper Universal 锉在去除牙胶方面明显更快（p=0.0011），但在到达工作长度或根尖挤出量方面，两种锉之间没有发现显著差异。
结论
ProTaper Universal 旋转锉在根管再治疗方面效果更好，两种技术都会导致类似的根尖碎屑挤出。
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