Classification and cyclic fatigue evaluation of new kinematics for endodontic instruments.

Autor: Gambarini G; Department of Oral and Maxillo Facial Sciences, Sapienza University, Rome, Italy., Piasecki L; Division of Endodontics, University at Buffalo, Buffalo, NY, USA., Miccoli G; Department of Oral and Maxillo Facial Sciences, Sapienza University, Rome, Italy., Gaimari G; Department of Oral and Maxillo Facial Sciences, Sapienza University, Rome, Italy., Di Giorgio R; Department of Oral and Maxillo Facial Sciences, Sapienza University, Rome, Italy., Di Nardo D; Department of Oral and Maxillo Facial Sciences, Sapienza University, Rome, Italy., Azim AA; Division of Endodontics, University at Buffalo, Buffalo, NY, USA., Testarelli L; Department of Oral and Maxillo Facial Sciences, Sapienza University, Rome, Italy.
Jazyk: angličtina
Zdroj: Australian endodontic journal : the journal of the Australian Society of Endodontology Inc [Aust Endod J] 2019 Aug; Vol. 45 (2), pp. 154-162. Date of Electronic Publication: 2018 Aug 16.
DOI: 10.1111/aej.12294
Abstrakt: 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.
(© 2018 Australian Society of Endodontology Inc.)
Databáze: MEDLINE
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