Wear simulation of resin composites and the relationship to clinical wear

This study used a new generalized wear model to examine the relationship between wear simulation and the clinical wear of two resin composites. Ten specimens each of P50 and Z100, were subjected to 100,000,400,000 and 800,000 cycles in a spring-loaded piston-type wear simulator. Wear was generated using flat, cylindrically-shaped stainless steel antagonists on the resin composites, which were placed in custom stainless steel fixtures. A slurry of polymethyl methacrylate beads was used as the abrasive media. Wear was determined using profilometry, and the parameters examined included volume loss (mm³), maximum depth (μm), mean maximum depth (μm) and mean depth (μm). Statistical analysis of the laboratory wear data using ANOVA and Tukey's post hoc test showed a significant difference (p