Physical Properties of an Acrylic Resin after Incorporation of an Antimicrobial Monomer

Abstract

The incorporation of MUPB affects the mechanical properties of a denture base acrylic resin; however, the only significant change was observed for flexural strength and may not be critical. Color changes were slightly higher when resin containing MUPB was immersed in wine for a prolonged time; however, the difference has debatable clinical relevance.

Effect of conventional water-bath and experimental microwave polymerization cycles on the flexural properties of denture base acrylic resins

“…The results of this study exceeded the recommended minimum values in all experimental conditions and may not have clinical relevance. Nevertheless, the values were in agreement with results obtained in the literature for heat-polymerized resins based on polymethyl methacrylate 11,[22][23][24] . However, as pointed out above, the results must be interpreted with caution, because different performance can be obtained when these materials are under fatigue loads when in function 25) .…”

Effect of Henna Addition on the Surface Roughness and Hardness of Polymethylmethacrylate Denture Base Material: An In-vitro Study

“…Regis et al (2011) found that the incorporation of 0.6% antimicrobial MUPB reduced the base's hardness, in agreement with the results of the current study. That said, our results are in opposition to a study in which alumina was added to the PMMA, which had a positive impact on the latter's physical and mechanical properties (Arora et al, 2015).…”

“…Compagnoni et al (2014) studied the effect of antimicrobial polymer (poly[2-tertbutylaminoethyl] methacrylate [PTBAEMA]) on the surface roughness and found that the addition of PTBAEMA to a PMMA acrylic denture base increased the Ra values, which is in line with the results of the current study. Meanwhile, Regis et al (2011) showed that the use of antimicrobial monomer methacryloyloxyundecylpyridinium bromide (MUPB) had no effect on the roughness of polished acrylic resin. Another team used alcohol vinegar in the PMMA as a way to reduce the number and adhesion of Candida albicans specimens; this had no effect on the surface roughness of the PMMA (de Castro et al, 2015).…”

“…The deflasked specimens were finished and polished using the Buehler MetaServ 250 Polisher and Grinder. Specimens were polished with a polishing cloth and a Masterprep Polishing Solution (0.05 micron) at speed using water as a cooling agent then stored in distilled water at 37 o C for 48+2 h before testing (Regis et al, 2011).…”

“…Eight indentations were made per specimen through the application of a 25-gf load for 30 seconds. To attain the final hardness values, the average of the eight indentations was calculated for each specimen (Regis et al, 2011).…”