Effect of Chitosan and Acrylic Acid Addition to Acrylic Resin on Porosity and Streptococcus mutans Growth in Denture Base

Abstract

Objective This work aimed to determine the effect of adding chitosan and acrylic acid to acrylic resin denture base on the porosity of the material and the growth of Streptococcus mutans. Materials and Methods This study is an experimental laboratory research. Samples were divided into the following three groups (n=10): group 1 was the control group, group 2 was the acrylic resin mixture with 1% chitosan and acrylate acid, and group 3 was the acrylic resin mixture with 2% chitosan and acrylate acid. S. mutans growth was tested using the dilution method, and porosity was examined using an optical microscope. Data were calculated by one-way analysis of variance (p<0.05) and correlation analysis. Results The acrylic resin added with 2% chitosan and acrylic acid showed pores with an almost spherical shape and the smallest size. Significant difference (p<0.05) was observed among all the groups. A positive and extremely strong correlation was found between porosity and S. mutans growth. Conclusion Chitosan and acrylic acid at 1 and 2% concentrations can be added to acrylic resin to minimize the porosity of the denture base and reduce the growth of S. mutans. A less porous denture is associated with a low S. mutans growth rate.

Effect of adding different nano particles on antimicrobial properties of heat cured acrylic resin

“…Results of the present study showed that the antimicrobial effect increased by increasing the percentage of the added chitosan nanoparticles to the heat cured acrylic resin, these results were in accordance with (30,31) . But increasing the percentage of chitosan can affect the mechanical properties of the heat cured acrylic adversely, for this reason its recommended to add chitosan nano particles with a percentage less than 1% (32) .…”

Effects of Addition of Chitosan and Dicarboxylic Acid on Properties of 3d Printable Acrylic Resin Denture Base

“…This phenomenon occurred because even after the polymerization of acrylic resin without a mixture, some monomers did not bind to the polymer and instead formed pores. Meanwhile, acrylic acid can function as a coupling agent to form bonds between acrylic resin and chitosan; hence, the monomers contained in the acrylic resin can be bonded during polymerization [29].…”

“…Therefore, this polymerization can reduce the formation of pores. The decrease in the amount of residual monomer can reduce the formation of space known as porosity [29]. A large pore size will allow the easy absorption of liquid, which in turn will reduce the density and other mechanical properties of the acrylic resin [31,32].…”