镍钛旋转器械与不锈钢手动器械根尖孔挤出物量的比较研究
A Comparative Study on the Amount of Extruded Material from the Apical Foramen with NiTi Rotary and Stainless Steel Hand Instruments.
作者信息
Nazari Shahrzad, Mirmotalebi Farshid
机构信息
Department of Endodontic, Dental School, Hamedan University of Medical Sciences, Hamedan, Iran.
Department of Prosthodontic, Dental School, Hamedan University of Medical Sciences, Hamedan, Iran.
出版信息
Iran Endod J. 2006 Summer;1(2):69-72. Epub 2006 Jul 1.
INTRODUCTION
The purpose of the present study was to quantify and compare the amount of extruded debris from apical foramen after instrumentation of the root canal system with hand and rotary instruments.
MATERIALS AND METHODS
Root canals of forty five fresh extracted single rooted human teeth with mature apexes and less than 15 degree of root curvature were instrumented in group A with stainless steel K-Type files, in group B with rotary NiTi Flex Master files, and in group C with rotary NiTi ProTaper files and followed weighting the extruded debris by a digital scale to within 0.0001 gram accuracy.
RESULTS
In all groups, the mean weight of extruded debris was not more than 5 mg (P=0.0l) and was ranked as: Group A>Group B>Group C. There were statistically significant differences among three groups (p=0.0l). The mean value of extruded debris in the ProTaper and Flex Master groups were 0.652 and 0.788 mg, respectively.
CONCLUSION
The study revealed that the amount of extruded debris from the apical foramen was minimal when ProTaper files were used.
引言
本研究的目的是量化并比较使用手动器械和旋转器械对根管系统进行预备后，根尖孔挤出碎屑的量。
材料与方法
选取45颗新鲜拔除的单根人牙，根尖成熟且牙根弯曲度小于15度，A组使用不锈钢K型锉进行根管预备，B组使用旋转镍钛Flex Master锉，C组使用旋转镍钛ProTaper锉，然后用电子天平精确称至0.0001克来称量挤出的碎屑。
结果
所有组中，挤出碎屑的平均重量均不超过5毫克（P = 0.01），且排序为：A组>B组>C组。三组之间存在统计学显著差异（p = 0.01）。ProTaper组和Flex Master组挤出碎屑的平均值分别为0.652毫克和0.788毫克。
结论
该研究表明，使用ProTaper锉时，从根尖孔挤出的碎屑量最少。
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