Relationship between filler content and selected mechanical properties of six microhybrid composites

Abstract

Purpose: The purpose of this study was to evaluate the influence of filler weight content on selected mechanical properties of six microhybrid composite resins. Methods: Compressive strength, elastic modulus, Vickers microhardness (VHN), and weight filler content were evaluated in the following dental composites: Admira (AD), Charisma (CH), InTen-S (IN), Tetric Ceram (TC), Point 4 (P4), and Z250 (Z2). Results: Mean values for compressive strength (MPa) ranged from P4 76.60 to Z2 222.33. The elastic moduli (GPa) ranged from IN 2.56 to Z2 4.59. Microhardness VHN ranged from P4 50.53 to Z2 87.88. Filler weight content (Wt %) ranged from IN 72.51 to TC 79.56. Significant differences were found between the composites (ANOVA/Tukey's, P<0.05). Conclusion: Z2 had the highest compressive strength; Z2 and TC showed the highest elastic modulus, VHN and filler weight content. Weight filler content had a strong influence on mechanical properties (0.78 <0.01). © 2011 Mota et al.; licensee EDIPUCRS.