Abstract

GOUVEA, Cresus V.D; WEIG, Karin; FILHO, Thales R.M  and  BARROS, Renata N. Assessment of variations in wear test methodology. Acta odontol. latinoam. [online]. 2010, vol.23, n.1, pp.58-62. ISSN 1852-4834.

The properties of composite resin for dental fillings were improved by development, but its weakness continues to be its wear strength. Several tests have been proposed to evaluate wear in composite resin materials. The aim of this study was to verify how polishing and the type of abrasive can influence the wear rate of composite resin. The test was carried out on two groups. In one group we employed an ormocer and a hybrid composite that was polished only with 600 and 1200 grit abrasive papers, whereas in the other group the composite was polished with the same abrasive paper plus a 1 μm and 0.25 μm grit diamond paste. A three-body wear test was performed using the metal sphere of the wear test machine, the composite and an abrasive. A diamond paste and aluminum oxide dispersion were used as abrasive. Analysis of the results showed that there was no difference between polishing techniques, but revealed a difference between abrasives.

Keywords : Composite resins; Dental polishing; Composite wear.

        · abstract in Portuguese     · text in English     · English ( pdf )