Influence of torque on the separation rate of ProTaper rotary instrument S 1
Ban Jian-dong
LI Jun-ke
HOU Yan
XU Hua
WANG Shuang-qing
Abstract：AIM:To investigate the influence of torque on the separation rate of rotary nickel-titanium Pro-Taper instrument S1.METHODS:204 S-shaped simulated root canals were divided into high torque group (n=105) and low torque group (n=99)and were shaped by ProTaper instrument S1.The mean number of canals shaped by the instruments under different torque before file fracture or deformation and the average preparation time were recorded and compared.RESULTS:In high and low torque torque groups SI shaped 13 and 12 simulated root canals respectively before file fracture or deformation (P>0.05).The average preparation time of high and low torque groups was 1.12 min and 2.11 min (P<0.05)respectively.CONCLUSION:Torque shows no influence on the separation rate of ro-tary nickel-titanium ProTaper instrument S1.With high torque the instrument works more efficiantly.
Keywords：torqueProTaper rotary instrumentinstrument separationroot canal preparation
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 360-362 )