Comparison of three files to prepare curved root canals
YAN Zhi-qiang
WU Xia
LIU Yu
XIA Deng-sheng
LIU Shi-sen
Abstract：Objective:To compare the application of 3 kinds of root canal preparation system in stainless steel hand K files,the PROTAPER and Mtwo nickel-titanium (NiTi) system.Methods:120 curved teeth were selected and divided into three groups randomly.The degree of root canal curvature was determined on the initial radiograph by using Schneider's method.Group 1 teeth were instrumented with stainless steel hand K files,group 2 teeth were instrumented with PROTAPER files,and group 3 teeth were instrumented with Mtwo files.The effect of root canal preparation and filling in three different systems were evaluated.Results:There was no significant difference of working time,instruments fracturing,root canal transportation,ledge and lateral penetration between PROTAPER and Mtwo NiTi rotary root canal preparation systems.There was a high risk of curved root canal preparation with stainless steel hand K files.Conclusions:Mtwo and PROTAPER machine with NiTi rotation system for curved root canal preparation effect is good and there is no significant difference between the two groups.They had more advantages than conventional hand files during preparation curved root canals.
Keywords：root canal therapyrotary systemcurved root canals
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 129-131 )