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Contribution au développement d'une nouvelle génération de limes endodontiques en alliage à mémoire de forme monocristallin cuivreux

Abstract : Recent enhancements in canal instrumentation area have significantly improved the endodontic treatment making it faster and more efficient. The improvement of endodontic file quality through the instrument geometry, operating motion, and material properties made the endodontic treatment safer and thereby preserving the tooth and the surrounding periodontal tissues. Nevertheless, few research works investigated the possibility of using an alternative shape memory alloy (SMA) to the Nickel-Titanium (NiTi). This PhD work focuses on investigating the possibility of use in endodontic of Cu-based SMA having promising antimicrobial properties I.e. the Copper-Aluminum-Beryllium (Cu-Al-Be) single crystal SMA. The present study is based on an experimental approach using an original testing device able to apply bending and torsion loading in separate or combined way. Such solicitations are mainly induced by the curvature of the dental canal while the mechanical preparation. A numerical approach completes this experimental part by considering a finite element model representative of the file geometry, the thermomechanical behavior of the Cu-based single crystal or NiTi polycrystal SMAs and the bending- torsion loading and boundary conditions. A developed numerical tool allowed to build a parametrized geometry of an endodontic file and mesh it with tetrahedral finite elements in order to numerically analyze its response under combined bending-torsion loading. Based on these two approaches, an experience plan was carried out in order to analyze the influence of geometrical parameters on the response of endodontic files made of Cu-based single crystal SMA. It could be a precious tool for decision aid in choosing endodontic file geometry and its adapted use for root canal preparation.
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Submitted on : Monday, July 12, 2021 - 7:54:42 PM
Last modification on : Friday, August 5, 2022 - 2:54:00 PM
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  • HAL Id : tel-03284798, version 1


Paul Xolin. Contribution au développement d'une nouvelle génération de limes endodontiques en alliage à mémoire de forme monocristallin cuivreux. Mécanique des matériaux [physics.class-ph]. Université de Lorraine, 2020. Français. ⟨NNT : 2020LORR0256⟩. ⟨tel-03284798⟩



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