Year : 2019

Volume : Volume 10

Issue : Issue 4

Address for correspondence :
Dr. Praval Pratap Singh.
drpraval.pratap@gmail.com

Abstract

Background:  Polymethyl methacrylate has been one of the widely used denture base materials with many favourable qualities but the material needs improved fracture resistance. The purpose of this study is to measure the effect of fiber strengtheners on the flexural properties of denture base resin material. This study also aims to analyse the effect of different polymerization techniques (conventional water bath technique and the microwave processing technique) on the flexural strength of fiber reinforced denture base resin so as to develop a denture base resin with optimum flexural strength that is clinically acceptable. Material and methods. Thirty specimens of similar dimensions were prepared for each of the control group and 4 experimental groups: conventional acrylic resin and the same resin reinforced with glass and nylon fibers and cured by water bath and microwave technique. Flexural strength was evaluated with a 3-point bending test. The results were analyzed with a 1-way analysis of variance. Results. All reinforced specimens showed better flexural strength than the conventional acrylic resin. Specimens reinforced with glass fibers and cured by the conventional water bath technique showed the highest flexural strength. Conclusion. Within the limitations of this study, it could be concluded that the flexural strength of heatpolymerized PMMA denture resin was improved after fibre reinforcement especially glass fibres. The specimens cured by water bath technique showed more flexural strength than microwave curing technique also the difference was not significant.

Keywords: Denture Base Resin, Flexible reinforced Denture Base Resin, Flexural Strength, Processing Technique.