Comparision of impact strength in three different types of denture base resins - an in-vitro study

ABSTRACT

The aim of this study was to evaluate whether the impact strength of a commercially available, heat polymerized acrylic denture base material could be improved using reinforcements. A total of 30 specimens [65 mm x 10 mm x 3 mm] were fabricated, the specimens were divided into 3 groups with 10 specimens each. They were Group 1 - conventional denture base resins, Group 2 - high impact denture base resins and group 3 - glass reinforced denture base resins. The impact strength of specimens was measured using charpy's test. One-way analysis of variance [ANOVA] was used to determine statistical differences among the impact strength of three groups. Data were analyzed by SPSS software and the results were obtained. The flexural strength values showed statistically significant differences among experimental groups [P<0.005]. Within the limitations of the study PMMA reinforced with glass fibers showed the highest impact strength values, and this was followed by PMMA reinforced with butadiene styrene and the least strength was observed in the conventional denture base resins