title: [Shaping ability of multi-taper nickel-titanium files in simulated resin curved root canal].
abstract: 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.
authors.affiliation: Key Laboratory of Oral Biomedical Engineering, Ministry of Education, Sichuan University, Chengdu 610041, China.
authors.forename: Hong-Xia
authors.initials: HX
authors.lastname: Luo
authors.forename: Ding-Ming
authors.initials: DM
authors.lastname: Huang
authors.forename: Liu-He
authors.initials: LH
authors.lastname: Jia
authors.forename: Shi-Gao
authors.initials: SG
authors.lastname: Luo
authors.forename: Xiao-Jie
authors.initials: XJ
authors.lastname: Gao
authors.forename: Hong
authors.initials: H
authors.lastname: Tan
authors.forename: Xue-Dong
authors.initials: XD
authors.lastname: Zhou
mesh_terms: 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
chemical_list: D003722:Dental Alloys; C040654:titanium nickelide; D013193:Stainless Steel; D009532:Nickel; D014025:Titanium