DOI: 10.36347/sajb.2014.v02i12.026

Pages: 978-982

Flexural and impact strength of denture base resins play a important role in success of prosthesis and many approaches have been made to improve the fracture resistance of acrylic resin dentures by strengthening them. Purpose of the study was to assess and compare the effect of high strength denture bse material with conventional heat and chemical-polymerized poly(methylmethacrylate) [PMMA] denture resin under dry and wet storage conditions. Ninety specimens of standard dimensions were prepared and 30 samples per three experimental groups;that is on the basis of storage conditions (dry and wet).All 90 specimens were then subjected to a 3-point bending test and flexural strength and Notched Izodimpact tester for impact strengthwas calculated. Statistical analysis was carried out using One Way Analysis of Variance and multiple comparison test. The mean flexural strength and impact strength of Trevelon HI heat cure resin when tested under dry conditions was high as compared to DPI Heat and chemical cure resins. All the specimens stored under wet conditions showed decrease in flexural strength in comparison to those stored in dry conditions.