The Impact of the Type and Concentration of Different Additives on the Water Sorption of Denture Base Resin

Abstract

Aims:To evaluate the effect of incorporation of different types and concentrations of additives on water sorption denture base acrylic resin. Materials and Methods: Heat polymerized acrylic resin samples were prepared and divided into two groups; control group (without additives) and experimental group (with additives). The additives were three types of polymers (Styrene Butadiene Rubber (SBR), Poly Ethylene Glycol (PE) and Poly Urethane (PU)) being added with three concentrations 1%, 3% and 5%. SPSS Version 19 was used to analyze and to assess the results of the present study by mean of Descriptive statistics, analysis of Variance (ANOVA) and Duncan multiple range tests at p ≤0.05. Results: The results reveal that there is statistically significant reduction in the amount of water sorption of experimental group as compared to that of control group at p≤ 0.05. The reduction in the amount of water sorption of experimental group is directly proportional to the concentration of incorporate additives . Conclusions: Water sorption of experimental group is less than that of control group. The additives produce statistically significant reduction in the amount of absorbed water of denture base resin and this reduction was directly proportional to the concentration additives material being used.

The effect of aging on hardness of heat cured denture base resin modified with recycled acrylic resin

“…The incorporation of the recycled acrylic resin into the heat cured denture base resin improved its hardness (Table 1 ), which is consistent with the results obtained by Salim and Muhsin ( 2020 ), who concluded that the incorporation of a recycled polyether ether ketone polymer improved the hardness of the denture resin. The enhanced hardness could be attributed to the improved degree of conversion, high crystallinity, and/or decreased porosity of the resulting composite polymer (Dagdiya et al, 2019 ; Elboraey et al, 2016 ; Mohammed & Hasan, 2022b ), or it might be due to the decrease in the residual monomer content (Ajay et al, 2020 ). The highest hardness was recorded by adding 5% recycled acrylic resin.…”