AN INVESTIGATION OF THE DEACTIVATING ABILITY EXHIBITED BY VARIOUS ADHESIVE GEL BASES TOWARDS METHYL METHACRYLATE
Background This paper deals with the deactivating ability of various adhesive gel bases with regard to methyl methacrylate (MMA). MMA is a toxic substance released from the base of removable dentures; it mainly affects the nervous and vascular systems and exhibits a pronounced cumulative effect. The following adhesive gel bases were used: “Silativit” silicon-containing glycerol hydrogel, silicon-titanium-containing glycerol hydrogel, titanium-containing glycerol hydrogel (tizol), silicon-containing glycerol hydrogel, and a gel containing 2% of carbopol. Objectives To evaluate the ability of various adhesives gel bases to «neutralize» the residual monomer (MMA) from the acrylic bases of removable dentures. Methods A comparative study of the deactivating ability of various gel bases with regard to MMA was carried out using the UV-spectroscopy method. The following adhesive gel bases were used: «Silativit» silicon-containing glycerol hydrogel, silicon-titanium-containing glycerol hydrogel, titanium-containing glycerol hydrogel (tizol), silicon-containing glycerol hydrogel and a gel containing 2% of carbopol. Results The gel bases under study were ranked according to the level of their deactivating activity towards methyl methacrylate. Silicon-chitin-containing glycerol hydrogel was found to demonstrate the highest deactivating activity. Under the experimental conditions, no significant differences were observed between glycerol hydrogels containing titanium, silicon-titanium and silicon, as well as hydrogel containing 2% of carbopol, Conclusions A comparative estimation of the deactivating ability of various gel bases with regard to MMA was carried out using the UV-spectroscopy method. The gel bases were ranked according to their deactivating activity; silicon-chitin-containing glycerol hydrogel was found to exhibit the highest neutralizing ability. The high deactivating activity of silicon-chitin-containing glycerol hydrogel with regard to MMA makes this material suitable for its further application in adhesive compositions capable of protecting patients from the residual monomer released by the acrylic base of removable dentures.