[Shaping ability of multi-taper nickel-titanium files in simulated resin curved root canal].
OBJECTIVE
To compare the shaping ability of ISO standard stainless steel K files and multi-taper ProTaper nickel-titanium files in simulated resin curved root canals. METHODS Thirty simulated resin root canals were randomly divided into three groups and prepared by stainless steel K files, hand ProTaper, rotary ProTaper, respectively. The amount of material removed from inner and outer wall and canal width after canal preparation was measured, while the canal curvature before and after canal preparation and canals aberrations were recorded.


RESULTS
The stainless steel K files removed more material than hand ProTaper and rotary ProTaper at the outer side of apex and inner side of curvature (P < 0.05). The mean degree of straightening in stainless steel K files group was significantly bigger than in ProTaper group (P < 0.05). The canals prepared by ProTaper had no evident aberration.


CONCLUSIONS
The shaping ability of ProTaper is better than stainless steel K files.
Luo
Hong-Xia
HX
Key Laboratory of Oral Biomedical Engineering, Ministry of Education, Sichuan University, Chengdu 610041, China.
Huang
Ding-Ming
DM
Jia
Liu-He
LH
Luo
Shi-Gao
SG
Gao
Xiao-Jie
XJ
Tan
Hong
H
Zhou
Xue-Dong
XD
D003722:Dental Alloys; D003762:Dental Instruments; D003786:Dental Pulp Cavity; D004868:Equipment Failure; D006801:Humans; D009532:Nickel; D018915:Root Canal Preparation; D013193:Stainless Steel; D014025:Titanium
D003722:Dental Alloys; C040654:titanium nickelide; D013193:Stainless Steel; D009532:Nickel; D014025:Titanium