Impact strength of poly methyl methacrylate denture base resin of different thicknesses reinforced with glass fibre- An invitro study

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Original Article

Author Details : Yadav G , Singh SV , Tiwari B , Shekhawat H , Laddha K*

Volume : 2, Issue : 2, Year : 2014

Article Page : 18-31

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Abstract

The "impact strength" of acrylic denture base resin of two different thicknesses was evaluated by reinforcing it with glass fibres in different and same concentration using Charpy type plastic impact testing machine. A total of 80 specimens of DBR were used in thepresent study. All the specimens (unreinforced and reinforced) were put under the category A and B depending on their dimensions. To prepare the acrylic resin specimens wax blocks were made using the brassdies and were invested and acrylized. In the group A reinforced acrylic resin (with 3% glass fibres) specimen had the highest impact strength (5.4940.93) followed by reinforced acrylic resin (with 2% glass fibres) specimen (5.20+0.88).In the group B reinforced acrylic resin (with 3% glass fibres) specimen had the highest impact strength (1.24+0.17) followed by reinforced acrylic resin (with 2% glass fibres) specimen (0.82+0.10).On applying ANOVA test to compare the groups of category A the result was showing very highly significant difference as the p-value was 0.000 (p> 0.001 -very highly significant) . Similar results were obtained for groups of category B.

Keywords: Glass fiber, Poly Methyl-methacrylate, Impact strength ,Denture Base Resins.

How to cite : Yadav G, Singh Sv, Tiwari B, Shekhawat H, Laddha K, Impact strength of poly methyl methacrylate denture base resin of different thicknesses reinforced with glass fibre- An invitro study. J Dent Spec 2014;2(2):18-31

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