Title

Rotary nickel-titanium GT and ProTaper files for root canal shaping by novice operators: a radiographic and micro-computed tomography evaluation.

ORCiD

Dr. Ove A. Peters: 0000-0001-5222-8718

Document Type

Article

Publication Title

Journal of Endodontics

ISSN

0099-2399

Volume

35

Issue

11

DOI

10.1016/j.joen.2009.07.018

First Page

1584

Last Page

1588

Publication Date

11-1-2009

Abstract

INTRODUCTION: The purpose of this study was to assess canal preparation outcomes in vitro by novice clinicians after standardized teaching sessions.

METHODS: All students received a training session. In experiment 1, twenty canals of mandibular molars were prepared with GT and ProTaper rotaries by 10 students. Standardized radiographs were exposed before and after canal preparation, and canal curvature was measured; canals were assessed for patency and preparation time. In experiment 2, mandibular molars (20 canals) were submitted to microcomputed tomography before and after canal preparation with ProTaper and GT rotaries by 2 dental students. Canals were metrically assessed for changes (volume, surface, cross-sectional shape, transportation) during canal preparation by using software.

RESULTS: In experiment 1, canal curvature decreased by 7.6 degrees and 7.8 degrees for GT and ProTaper preparations; there were no broken instruments, and 2 canals lost patency. The time for GT preparation was longer than for ProTaper (29.7 +/- 6.8 vs 19.4 +/- 8.1 minutes, P

CONCLUSIONS: Both rotary instruments performed adequately with inexperienced operators who received a brief structured training session.