Serveur d'exploration sur le cobalt au Maghreb

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Contribution à l'étude de l'usure des prothèses totales de hanche. Approche expérimentale sur simulateur

Identifieur interne : 000777 ( Main/Exploration ); précédent : 000776; suivant : 000778

Contribution à l'étude de l'usure des prothèses totales de hanche. Approche expérimentale sur simulateur

Auteurs : Atef Boulila [Tunisie] ; Khemaïes Jendoubi [Tunisie] ; Patrick Chabrand [France] ; Ali Zghal [Tunisie] ; Mustapha Khadhraoui [France]

Source :

RBID : Pascal:09-0099185

Descripteurs français

English descriptors

Abstract

The evaluation of an implant, in terms of quality control, can be done ultimately only by the clinical investigation. This step should not touch only the new implants but also should be applied to any modification even if it is light of an already existing implant. The prospective clinical investigation remains however a heavy, constraining and long approach. It is undertaken currently only for new implants or when a modification truly innovating is made to an already existing implant [1]. Within the framework of the development of a new articular implant and in particular when in a new designing geometry or during the modification of this one, it could be interesting to have a tool for pre test clinical making it possible to envisage the behaviour and the performances of this prosthesis before investing heavy means of a clinical study which remains however in the long term, essential. The tribological tests on simulators can offer this possibility [2]. In this study, we show the importance of the effects of the sterilization process,as can exploit the role of the biological environment and the materials couple (prosthesis head and cup). The higher hip prostheses diameter (Ø28 mm) and the choice of the CoCrMo/polyethylene couple seem to give a lower wear rate and consequently a better longevity of the arthroplasty [3].


Affiliations:


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<term>Cobalt base alloys</term>
<term>Durability</term>
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<term>Hip</term>
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<term>Ethylène polymère</term>
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<term>Etude expérimentale</term>
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<term>Alliage CoCrMo</term>
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<div type="abstract" xml:lang="en">The evaluation of an implant, in terms of quality control, can be done ultimately only by the clinical investigation. This step should not touch only the new implants but also should be applied to any modification even if it is light of an already existing implant. The prospective clinical investigation remains however a heavy, constraining and long approach. It is undertaken currently only for new implants or when a modification truly innovating is made to an already existing implant [1]. Within the framework of the development of a new articular implant and in particular when in a new designing geometry or during the modification of this one, it could be interesting to have a tool for pre test clinical making it possible to envisage the behaviour and the performances of this prosthesis before investing heavy means of a clinical study which remains however in the long term, essential. The tribological tests on simulators can offer this possibility [2]. In this study, we show the importance of the effects of the sterilization process,as can exploit the role of the biological environment and the materials couple (prosthesis head and cup). The higher hip prostheses diameter (Ø28 mm) and the choice of the CoCrMo/polyethylene couple seem to give a lower wear rate and consequently a better longevity of the arthroplasty [3].</div>
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