| Literature DB >> 30113735 |
Gianluca Gambarini1, Lucila Piasecki2, Gabriele Miccoli1, Gianfranco Gaimari1, Roberto Di Giorgio1, Dario Di Nardo1, Adham A Azim2, Luca Testarelli1.
Abstract
This study evaluated the effect of new motions of the motor TriAuto ZX2 on the cyclic fatigue of endodontic instruments. Vortex Blue 35.06 instruments were divided into four groups (n = 10) and tested for fatigue in a curved artificial canal (90° and 2 mm radius) using the following motions: continuous rotation (CR), Optimum Torque Reverse (OTR) set at 180° and the Optimum Glide Path (OGP), which was tested at 90° and 240°. The time to fracture (TTF) and the lengths of the fractured fragments were recorded. The mean TTF was significantly different among the groups (anova, P < 0.05): OGP 90° (213.39 ± 27.45), OTR 180° (121.24 ± 17.03), OGP 240° (45.24 ± 5.61) and CR (8.43 ± 1.27). Weibull analysis confirmed the shortest life expectancy for CR and the longest survival for OGP at 90°. The resistance to fatigue was affected by motions and pre-set angles. The proprietary movements that are currently available for endodontic instruments were classified according to their kinematics.Entities:
Keywords: Optimum Glide Path motion; Optimum Torque Reverse motion; continuous rotation; cyclic fatigue; endodontic file motions; reciprocation
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Year: 2018 PMID： 30113735 DOI： 10.1111/aej.12294
Source DB: PubMed Journal: Aust Endod J ISSN： 1329-1947 Impact factor: 1.659