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Master Thesis

Évaluation comparée des fractures instrumentales en rotation continue et en réciprocité

Abstract : Despite many advantages, Ni-Ti instruments used with a continuous rotation motion are at risk of fracture during root canal shaping and this many have a direct impact on the success rate of endodontic treatments. At the end of the 2000s, Yared proposed a new concept of single-use instruments using an asymmetric movement of reciprocity. Compared to continuous rotation, this dynamic would allow the instrument to better resist cyclic fatigue and torsional forces, resulting in a decrease in the rate of instrumental fractures. The work aims to present a review of the literature on in vitro, ex vivo and in vivo studies addressing the resistance to fracture of endodontic systems using asymmetric reciprocity. The first part addresses the mechanical and biological aspects of instrumental fractures and gives a view on of the concept of asymmetric reciprocity and the endodontic instruments associated. The second part of this work compiles and discuss the results of available studies on the mechanical resistance of endodontic systems used with asymmetric reciprocity.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-01783694
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Submitted on : Wednesday, May 2, 2018 - 3:55:41 PM
Last modification on : Thursday, April 18, 2019 - 11:42:04 PM
Long-term archiving on: : Tuesday, September 25, 2018 - 7:55:28 AM

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  • HAL Id : dumas-01783694, version 1

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Laura Penso. Évaluation comparée des fractures instrumentales en rotation continue et en réciprocité . Chirurgie. 2018. ⟨dumas-01783694⟩

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