Two-body abrasion of commercial and experimental restorative and coating resins and an amalgam

Abstract

The rates of abrasion of six composite restorative resins, an unfilled resin, a dental amalgam, two experimental formulations of commercially available composites, and two coating materials were determined with use of a two-body abrasion test. The wear of composite restorative resins, coating materials, and a dental amalgam was evaluated by a two-body abrasion test. Commercial composite resins were ranked. The rate of abrasion of the dental amalgam was similar to that of the composites but less than that of a commercial unfilled resin. The coating materials were abraded more rapidly than the composites. An experimental composite resin containing quartz was abraded less rapidly than one containing lithium aluminum silicate and barium aluminum silicate. This study evaluates the wear of composite restorative resins by an abrasion test. Composite restorative resins, an unfilled resin, and a dental amalgam are ranked. Two experimental formulations, one the resin matrix of a composite material and the other the resin matrix and inorganic filler without a silane coupling agent, are compared for each of two commercial composite restorative materials. Finally, the abrasion resistance of two commercial coating (glazing) materials is evaluated.