2017 Volume 36 Issue 6 Pages 453-459
The aim of this study was to evaluate the mechanical properties of hybrid resin blocks for the CAD/CAM crown. Eight kinds of hybrid resin block were used. To investigate the biaxial flexural strength, the two-body wear and dynamic hardness tests were performed, and the inorganic filler content was measured. As an additional experiment, the biaxial flexural strength was subjected to 8,000 thermal cycles between water baths kept at 5℃ and 55℃. Data were analyzed using one-way ANOVA and Tukey’s method. The correlation with the inorganic filler content was analyzed using Pearson’s correlation coefficient. As a result, mechanical properties were different for each hybrid resin block, and there was a significant difference in the inorganic filler content between all hybrid resin blocks. There was a negative correlation between the inorganic filler content and wear, and a positive correlation between the inorganic filler content and hardness, but there was no correlation between the inorganic filler content and flexural strength.
