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Matrices expérimentales à usage odontologique : formulation, élaboration, caractérisation et leurs influences sur les contraintes de contraction

Abstract : Composite materials containing polymers are biomaterials frequently employed in dentistry where the matrix is synthesized in vivo by photocured radical chain. In Operative Dentistry, the resulting shrinkage strain produced during the synthesis of this matrix is a major disadvantage. It is, indeed, at the origin of often harmful and badly controlled physical stresses since the material, stuck to the cavity walls, is elaborated in confined surroundings. No study to date allowed analyzing thoroughly this phenomenon of contraction taking into consideration the operating conditions of the synthesis of the matrix. The goal of this work is thus to exclusively isolate the set of problems of the internal stresses by directing the study towards the matrix analysis. By elaborating prototypes based on Bis-GMA and UEDMA and after characterization of certain physicochemical, rheological and thermodynamic properties of mixtures of these comonomers and of the resulting copolymers, this work made it possible to contribute to a better understanding of the phenomenology of the viscoelastic relaxation which governs the dissipation of the shrinkage stress
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https://hal.univ-lorraine.fr/tel-01748715
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Christophe Charton. Matrices expérimentales à usage odontologique : formulation, élaboration, caractérisation et leurs influences sur les contraintes de contraction. Autre. Institut National Polytechnique de Lorraine, 2009. Français. ⟨NNT : 2009INPL023N⟩. ⟨tel-01748715⟩

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