Nanopigmented Acrylic Resin Cured Indistinctively by Water Bath or Microwave Energy for Dentures

Abstract

The highlight of this study was the synthesis of nanopigmented poly(methyl methacrylate) nanoparticles that were further processed using a water bath and/or microwave energy for dentures. The experimental acrylic resins were physicochemically characterized, and the adherence ofCandida albicansand biocompatibility were assessed. A nanopigmented acrylic resin cured by a water bath or by microwave energy was obtained. The acrylic specimens possess similar properties to commercial acrylic resins, but the transverse strength and porosity were slightly improved. The acrylic resins cured with microwave energy exhibited reducedC. albicansadherence. These results demonstrate an improved noncytotoxic material for the manufacturing of denture bases in dentistry.

New Trends for the Processing of Poly(Methyl Methacrylate) Biomaterial for Dental Prosthodontics

“…Suspension polymerization is adequate technically to obtain PMMA spherical microparticles with controlled sizes ranging from 5 to 1000 µm [22]. Alginate stabilizer produces microparticles from 5 to 80 µm (Figure 2a), whereas microparticles below 30 µm are obtained with gelatin stabilizer (Figure 2b) as previously reported [24][25][26]. These sizes are within the range of commercial PMMA (10 to 100 µm) used for prosthodontics (Figure 2c and d).…”

“…In this polymerization, the addition of a soluble stabilizer in water [gelatin, clay or clay derivative, cellulose derivatives, water-soluble polymers such as poly(vinyl alcohol) (PVA) or starch] helps to prevent the breakup of droplets or avoids the droplet from adhering to each other [20][21][22]24]. This process could be assisted with low temperature or ultrasonic waves [20,[24][25][26][27]].…”

“…Relative molecular mass 100.12 These properties are important for the final application, such as optical device, airplane windows, lenses, covers, automotive taillight, dental articles, and bioengineering [29]. Also, PMMA is a material widely used daily in dental practice, such as dental prosthesis for edentulous patients [24,26]. For this particular application, PMMA (experimental or commercial acrylic resin) must be processed by heat, which can be generated by hot water bath or microwave energy [12].…”

Effect of nanoscale particles incorporation on microhardness of polymers for oral prosthesis

“…This factor may be explained by some authors that reported water absorption when the acrylic resin is immersed in the aqueous environment. [ 10 14 15 ]…”

“…QC-20 resin with 3% pigment showed lower results [ Table 2 ] as displayed in Figure 2 . This fact can be associated to its fast polymerization cycle,[ 15 ] whereas the components evolved in the chemical activation can be responsible for the lowest results of superficial hardness (Knoop) since the chemically activated acrylic resins exhibit the lowest results when compared to the heat-activated. [ 17 ]…”