Le collage des alliages nickel-chrome utilisés en prothèse dentaire. Influence des traitements de surface et de la nature des résines sur la résistance à la rupture en traction

Ni-Cr alloys/resins bondings used for dental prosthesis. Influence of the surface treatments and of the nature of the resins on the tensile strength

¹ Docteur de 3ème cycle en sciences odontologiques, Attaché universitaire, Faculté de chirurgie dentaire, Université de Nancy I.
² Professeur, Ecole nationale supérieure des industries chimiques de l’Institut national polytechnique de Lorraine, Laboratoire de Thermodynamique chimique et appliquée, U.A. CNRS n° 1108, Nancy.

Abstract

The reactions carried out at the surface of the alloy formed from nickel and chromium, are chemical and electrochemical etching, electro-oxydation by contact, and silanation. Three resins were also tested: the first two are bis - G.M.A. - based, and the third is of A maximum of 20 MPa is attained using one of the first two resins (bis - G.M.A. - based) with silanation treatment. For the third resin (M.M.A. - based), the resistance to adhesion near to 23 MPa is independant of the state of the metallic surface, as this value infact characterises the resistance to breakage, of the bond which does not thus need any particular surface treatment.