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J. P. Artis-, CUNY -Assistant Hospitalier-Universitaire a.BOURRET -Docteur en Chirurgie Dentaire Thèse pour obtenir le diplôme D'Etat de Docteur en Chirurgie Dentaire (6'-'1S.Ç Présentée par: Monsieur EBLE Arnaud, né(e) à: NANCY (Meurthe-et-Moselle) le, 1984.