Centering ability of twisted files in shaping curved root canals
NI Na
YE Jing
SU Li-hua
ZHU Xiao-jie
PENG Bin
Abstract：AIM:To compare the centering ability of two rotary nickel-titanium (NiTi)systems,Twisted File (TF)and ProTaper,in shaping curved root canals.METHODS:50 mandibular molars with severe curvature were selected and divided randomly into 2 groups (n =25 ).After preparation with TF and stainless ProTaper,the amount of removed dentin and the centering ratio were respectively measured at 1 to 9 mm level.RESULTS:At 1 mm,6 mm and 7 mm level,there was no statistically significant difference in centering ratio between 2 groups (P>0.05).At 2 mm to 5 mm,8 mm and 9 mm level,the centering ratio of TF group was higher than that of Pro-Taper group(P<0.05).CONCLUSION:TF has greater centering ability and greater potential for preservation of the original canal shape than ProTaper in shaping curved root canals.
Keywords：nickel-titanium instrumentcentering abilitycentering ratiocanal transportation
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 679-681,684 )