As the leading distributor of Polident PMMA products in North America, Axsys Dental Soluitons was contacted by Burak Yilmaz, DDS, PhD, of the Division of Restorative Science and Prosthodontics at the Ohio State University College of Dentistry to inform us of the research he and his colleagues had completed and published pertaining to the strength of CAD-CAM high-density polymers used for interim implant-supported fixed, cantilevered prostheses and published in The Journal of Prosthetic Dentistry.
**Materials evaluated. **Specimens from 8 different brands of CAD-CAM HDPs, including Brylic Solid (BS); Brylic Gradient (BG); AnaxCAD Temp EZ (AE); AnaxCAD Temp Plus (AP); Zirkonzahn Temp Basic (Z); GDS Tempo-CAD (GD); Polident (Po); Merz M-PM-Disc (MAT); an autopolymerized acrylic resin, Imident (Conv) and an injection-molded acrylic resin, SR-IvoBase High Impact (Inj) were evaluated for load-to-fracture analysis.
Results. Statistically significant differences were found among load-to-fracture values of different HDPs (P<.001). GD and Po materials had significantly higher load-to-fracture values than other materials (P<.001), and no statistically significant differences were found between GD and Po. The lowest load-to-fracture values were observed for autopolymerized and BG materials, which were significantly lower than those of GD, Po, AE, AP, Z, MAT, Inj, and BS. The load-to-fracture value of autopolymerized acrylic resin was not significantly different
from that of BG CAD-CAM polymer.
Conclusions. GD and Po (Polident) CAD-CAM materials had the highest load-to-fracture values. AE, AP, Z, MAT, and BS CAD-CAM polymers and injection-molded acrylic resin had similar load-to-fracture values, which were higher than those of BG and autopolymerized acrylic resin. Autopolymerized acrylic resin load-to-fracture value was similar to that of BG CAD-CAM polymer, which is colored in a gradieny
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We have plans to continue working with Dr. Yilmaz and the University in support of the College's dental programs and research initiatives.