title: Evaluation of the surface characteristics of used and new ProTaper Instruments: an atomic force microscopy study.
abstract: The purpose of this study was to evaluate the topography of new and used ProTaper rotary nickel-titanium (NiTi) instruments by using atomic force microscope. Four new and four used size S1, S2, F1, and F2 instruments were selected for this study. New and used instruments were analyzed on 11 points along a 3-mm section at the tip of the instrument. Quantitative measurements according to the topographic deviations (root mean square) were recorded. Data were analyzed by paired samples t test. Mean root mean square values for used ProTaper instruments were higher than the new ones, and the difference between them was statistically significant. The results of this study showed that used ProTaper instruments demonstrated more surface deformation and wear.
authors.affiliation: Department of Endodontics and Restorative Dentistry, Faculty of Dentistry, Ondokuz Mayis University, Samsun.
authors.forename: Ugur
authors.initials: U
authors.lastname: Inan
authors.forename: Cumhur
authors.initials: C
authors.lastname: Aydin
authors.forename: Ozgur
authors.initials: O
authors.lastname: Uzun
authors.forename: Ozgur
authors.initials: O
authors.lastname: Topuz
authors.forename: Tayfun
authors.initials: T
authors.lastname: Alacam
mesh_terms: D000704:Analysis of Variance; D003722:Dental Alloys; D003762:Dental Instruments; D017743:Equipment Reuse; D018625:Microscopy, Atomic Force; D009532:Nickel; D018915:Root Canal Preparation / Q000295:instrumentation*; D013499:Surface Properties; D014025:Titanium
chemical_list: D003722:Dental Alloys; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium