The purpose of this study was to evaluate flexural strength and surface hardness of three different curing denture base materials.
Methods:
Three groups of different curing denture base materials were examined: Takilon(self-cured), Rodex (conventional heat-cured) and QC20 (rapid heat-cured). Specimens were fabricated following the manufactures’ instructions. Flexural strength was measured using a 3-point bending test according to ISO 20795-1:2008 at crosshead speed of 5mm/min. Vickers hardness test was performed with 100 g load for 20 sec. ANOVA was used for analyzing flexural strength and surface hardness at 0.05 significance level.
Results:
Mean flexural strength of Takilon, Rodex and QC20 were 61.63+ 2.71, 72.03+5.02 and 73.90+3.18 MPa respectively. Mean Vickers hardness number of Takilon, Rodex and QC20 were 13.5+0.67,15.84+0.30 and 15.23+ 0.38 respectively. Flexural strength and surface hardness of Rodex and QC20 were not significant difference. Flexural strength and surface hardness of Takilon were significantly lower than Rodex and QC20.
Conclusions:
Flexural strength and surface hardness of rapid heat-cured denture base material were not different from flexural strength and surface hardness of conventional heat-cured denture base materials. Flexural strength and surface hardness of self-cured denture base material were significantly lower than conventional heat-cured and rapid heat-cured denture base materials.