An evaluation of the Flexural Properties of Meliodent and Acropars Heat Polymerized Acrylic Resins

Objective: The aim of this study was to measure and compare the transverse strength and deflection of two acrylic resins. Method and Materials: A total of 30 samples, with dimensions of 2.5×10×65mm, were prepared with Acropars and Meliodent acrylic resins according to ADA specification No. 12. The specimens were divided into two groups of 15 samples each. A three-point bending test was carried out using a universal testing machine. Differences between the means of the two groups were analyzed with Student's t-test. Results: The mean (SD) transverse strength was 81.55 (1.54) Mpa in the Meliodent and 73.58 (0.6) Mpa in the Acropars samples, which showed a significant difference (P<0.001). The mean (SD) transverse deflection was 3.86 (0.09) mm and 4.96 (0.06) mm in the Meliodent and Acropars samples, respectively. A significant difference was found between the two groups (P<0.001). Conclusion: In the present investigation, the transverse strength of the Acropars specimens was smaller than that of the Meliodent samples and ADA specifications. However, the mean transverse deflection was larger in the Acropars group as compared to the Meliodent group.