IADR Abstract Archives
Innovation Of Dental Interim Prosthesis—Silver Nanowires Composite Resin
Objectives: The most notable concern regarding interim fixed partial dentures are their poor mechanical properties and the formation of microbial biofilms in the oral cavity. Therefore, the objective of the current study was to develop novel enhanced interim fixed partial dentures.
Methods: Polymethyl methacrylate (PMMA) and silver nanowires (AgNWs) were incorporated into manufactured PMMA/AgNW composite resin by using the uniform design (UD) method. The mechanical properties of the composite resin were evaluated using the nanoindention method and its antibacterial properties were examined using the desk diffusion method under the JIS Z 2801-2000 experimental standard. In addition, surface hardness, roughness, and color stability were investigated after restoring the composite resin in 37 °C water.
Results: Through the UD method for manufacturing PMMA composite resin, the following factors were identified as affecting surface hardness, in order of weighting: polymerization pressure > polymerization time > aspect ratio > concentrations. The optimal conditions were found to be polymerization pressure of 1.6 bar, polymerization time of 10 minutes, AgNW aspect ratio of 14, and concentration of 0.5%. Compared with pure PMMA, the PMMA composite resin was 1.7 times harder. Furthermore, according to the antibacterial experiments, the AgNW composite resin had a superior mechanical strength and inhibitory effect against Escherichia coli than the composite resin did.
Conclusions: AgNWs are an attractive alternative to traditional antibiotics because of their antimicrobial activity and low bacterial resistance. They can optimize initiator systems to produce commercially useful dental and medical resins.
Methods: Polymethyl methacrylate (PMMA) and silver nanowires (AgNWs) were incorporated into manufactured PMMA/AgNW composite resin by using the uniform design (UD) method. The mechanical properties of the composite resin were evaluated using the nanoindention method and its antibacterial properties were examined using the desk diffusion method under the JIS Z 2801-2000 experimental standard. In addition, surface hardness, roughness, and color stability were investigated after restoring the composite resin in 37 °C water.
Results: Through the UD method for manufacturing PMMA composite resin, the following factors were identified as affecting surface hardness, in order of weighting: polymerization pressure > polymerization time > aspect ratio > concentrations. The optimal conditions were found to be polymerization pressure of 1.6 bar, polymerization time of 10 minutes, AgNW aspect ratio of 14, and concentration of 0.5%. Compared with pure PMMA, the PMMA composite resin was 1.7 times harder. Furthermore, according to the antibacterial experiments, the AgNW composite resin had a superior mechanical strength and inhibitory effect against Escherichia coli than the composite resin did.
Conclusions: AgNWs are an attractive alternative to traditional antibiotics because of their antimicrobial activity and low bacterial resistance. They can optimize initiator systems to produce commercially useful dental and medical resins.