2020 Volume 39 Issue 1 Pages 77-86
The aim of this study was to compare the properties of different types of resin hybrid CAD/CAM blocks based on the volume of the inorganic filler. Experimental blocks with the same composition as that of a commercially hybrid resin block for molars but with different volumes of inorganic fillers were used. Surface hardness, flexural strength (three-point bending test), three-body abrasive wear behavior, tensile bond strength, and color differences were assessed. The data obtained were subjected to statistical analysis；correlations between the inorganic filler content and various properties of the materials were determined.
The inorganic filler content was positively correlated with surface hardness and three-point bending strength and negatively correlated with abrasive wear ( p＜0.05). The color difference decreased with an increase in the inorganic filler content. However, the tensile bond strength was not significantly correlated with the filler content. Furthermore, the rate of cohesive failure in the hybrid resin block increased with a decrease in the inorganic filler content.
