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Denture fractures are very common, reflecting the fact that both impact strength and flexural strength are barely adequate. Its relatively low young modulus compared with metal renders the material flexible even in thick sections used in dentures. The purpose of this study was to find out and evaluate the impact and flexural strength values of certain brands of commercially available denture base resin and suggest their suitability. A total of 60 specimens (n 5 60) were fabricated using metal dyes and divided into four groups (Group I: PMMA-TREVALON, Group II: PMMA-ACRALYN-HI, Group III: PMMA-TREVALON-HI, Group IV: PMMA-ACRALYN-H) of commercially available denture base resin, with each group containing 15 specimens. All specimens were tested for flexural resistance on the Hounsfield tensometer and for impact strength on Hounsfield balanced pendulum impact machine. Data analysis was done using one-way ANOVA to compare means between the groups. Group IV showed significantly very high impact strength compared to Groups I and II. However, the difference between Groups III and IV was insignificant. Group IV showed significantly very high flexural strength compared to all other groups. Within the limitations of the study, it is observed that Acralyn-H super unbreakable recorded the highest impact and flexural strength.

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