Characteristics by filler type of dental hard resin for indirect restorations

Abstract

The aim of this study was to evaluate the mechanical properties of different dental hard resin using indirect restorative materials. Surface hardness, three-point bending, wear, and staining tests were performed, and the inorganic filler content of the resins was measured. Additionally, a three-point bending test was performed after storage of the resins under thermal stress at 5℃ and 55℃ for 10,000 cycles. Data were analyzed using one- or two-way analysis of variance and Bonferroni post-hoc tests. Correlations between the inorganic filler content and various properties of the resins were analyzed using Pearson’s correlation coefficient. The elastic modulus and surface hardness of the resins were positively correlated with the inorganic filler content. Furthermore, significant differences in flexural strength were observed for each dental hard resin between the control and thermal stress groups. However, no significant differences in the wear loss volume were noted. It was shown that the inorganic filler content is one of the factors that influence the properties of dental hard resin.