The effect of aluminum oxide on heat polymerized acrylic resin denture base material to flexural strength and color stability

Abstract

The purpose of this study was to determine the effect of aluminum oxide addition on heat polymerized acrylic (HPA) resin denture base to flexural strength and color stability. Method: This study was carried out on HPA resin samples without and with the addition of aluminum oxide with a concentration of 0.5%, 1.5%, 2.5%. A bar-shaped sample sized 65 x 10 x 3 mm was used for flexural strength testing and circular-shaped sample with a diameter of 50 mm x 1 mm (no. 80) was used for color stability testing; 24 samples for flexural strength test and 24 samples for color stability test. All samples were immersed in distilled water for 48 hours at 37°C in an incubator. A universal testing machine was used to test flexural strength and a portable colorimeter was used for color stability testing. Conclusion: The addition of 0.5% aluminum oxide significantly increase the flexural strength and has good color stability.