Effect of immersion time in denture cleanser on the transverse strength of heat-cured acrylic resin

Abstract

This study aimed to determine the effect of immersion time in denture cleanser on the transverse strength of heat-cured acrylic resin. Specimens were immersed in denture cleanser and aqua bidest for 7 days, 14 hours, 30 minutes; 10 days, 3 hours, 20 minutes; and 12 days, 16 hours, 10 minutes, which simulated daily 5-minute immersion for 6, 8, and 10 years. Transverse strength was measured by using the 3-point bending method and a universal testing machine. The data were analyzed by independent t-tests and one-way ANOVA. The strength of specimens immersed in denture cleanser did not decrease, contrary to those in aqua bidest in which strength reduction was observed over time. Consequently, the strength of the specimens in aqua bidest were lower than those in denture cleanser, especially at test times corresponding to 8 and 10 years of daily use.