Effect of reinforcing heat cured acrylic resin denture base with silanated and non-silanated glass fiber on some of its mechanical properties.

The aim of this study was to evaluate the effect of reinforcing heat cured acrylic resin denture base with silanated and non-silanated glass fiber on some of its mechanical properties (impact strength and flexural strength).
Material and Methods: A total number of 140 specimens were used in this study. The specimens were divided into three groups, heat cured acrylic resin (HCAR) 20 specimens (control group), HCAR reinforced with glass fiber (60 specimens’ group I), and HCAR reinforced with silanated glass fiber (60 specimens’ group II). Then group I and group II was divided into three sub-groups according to the percentage of glass fiber incorporation {(5% by weight, 10% by weight and 15% by weight. Each sub group consists of 10 specimens for each test.
Following A.D.A. specification No 12 for denture base polymers. wax patterns of specimens were prepared with different dimensions for every test

Impact strength was tested by Charpy’s impact testing machine, while Flexural Strength Test was performed using Nexygen from Lloyd Instruments.

Results: reinforcing heat cured acrylic resin denture base with 5% glass fiber with and without silane coupling agent will increase impact and flexural strength mean values significantly.
Conclusion: reinforcing heat cured acrylic resin denture base with glass Fiber within limit with or without saline coupling agent will improve its impact and flexural strength values.