SciELO - Scientific Electronic Library Online

 
vol.7 issue2Influence of deformation on the kinetics of phase transformation in a forging steel during warm workingLow carbon content NiTi shape memory alloy produced by electron beam melting author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Materials Research

Print version ISSN 1516-1439

Abstract

LEVY NETO, Flaminio; BRITO, Luciana de Moura  and  ELIAS, Antônio Carlos. Mechanical behavior of silver alloys used as cast post and core in maxillary incisors. Mat. Res. [online]. 2004, vol.7, n.2, pp. 255-262. ISSN 1516-1439.  http://dx.doi.org/10.1590/S1516-14392004000200007.

This experimental "in vitro" investigation is mainly concerned with the mechanical behavior of twenty plastic analogous simulating endodonticaly treated maxillary central incisor roots, divided in two groups, which were restored with: (i) silver (10 specimens, Ag - 80%); and (ii) silver - palladium (10 specimens, Ag - 58.5% / Pd - 27.4%) cast alloys. All the restored analogous were clamped inside stainless steel cylinders filled with acrylic resin, and were tested to failure in an INSTRON machine. The static compressive loads were applied with an inclination of 45° relatively to the longitudinal direction of the teeth. On average, the specimens restored with Ag- Pd presented higher values of final failure load (i.e. fracture or excessive plastic bending) and stiffness. On the other hand, those restored with Ag presented average proportional limit loads which were, in comparison, about 5% higher.

Keywords : mechanical behavior; central incisors; "in vitro" evaluation.

        · text in English     · pdf in English