IADR Abstract Archives

Surface Characterization of Polished and Glazed High-strength Chair-side CAD/CAM Ceramics

Objectives: This in-vitro study evaluated the surface roughness and gloss of 3 high strength chair-side CAD/CAM ceramics: leucite-reinforced glass (Empress CAD, Ivoclar/Vivadent), lithium disilicate (e.max CAD, Ivoclar/Vivadent) and zirconia-reinforced lithium silicate (Celtra-Duo, Dentsply) after polished or glazed treatment.
Methods: Three groups of 15 samples of each ceramic (n=135) were milled with a CAD/CAM machine (CEREC MCXL/Sirona) using a master file design of a full coverage onlay. Baseline surface roughness and gloss measurements were assessed using a confocal laser microscope (Lext OLS4000/Olympus) and a glossmeter (Novo-Curve, Rhopoint Instrumentation). One calibrated operator finished and polished 2 groups of each ceramic material using either a conventional diamond impregnated point polishing system (DP = Dialite/Brassler) or a diamond impregnated spiral polishing system (DS =Luster/Meisenger). The third group for each ceramic was glazed-fired (GF). All treated ceramic samples were analyzed for surface roughness and gloss.
Results: Two-way ANOVA showed significant difference among all treatments (p<0.001). Tukey multiple comparisons and significance between materials are displayed in table below. Pearson’s correlation coefficient indicated high inverse correlation between Sa and gloss (r=-0.80).
Conclusions: DP provided significantly smoother and glossier surfaces than DS for IPS EmpressCAD samples. Both polishers provided comparable smootheness results for e.maxCAD and Celtra Duo. DP created glossier surfaces for Celtra Duo. No statistically significant difference was found for gloss values of e.maxCAD samples between polishers. This study was funded by a research grant from Meisinger USA.
AADR/CADR Annual Meeting
2016 AADR/CADR Annual Meeting (Los Angeles, California)
Los Angeles, California
2016
0068
Dental Materials 1: Ceramic-based Materials
  • Wade, Stephen  ( University of Michigan , Ann Arbor , Michigan , United States ;  University of Michigan , Ann Arbor , Michigan , United States )
  • Fasbinder, Dennis  ( University of Michigan , Ann Arbor , Michigan , United States ;  University of Michigan , Ann Arbor , Michigan , United States )
  • Dennison, Joseph  ( University of Michigan , Ann Arbor , Michigan , United States ;  University of Michigan , Ann Arbor , Michigan , United States )
  • Yaman, Peter  ( University of Michigan , Ann Arbor , Michigan , United States ;  University of Michigan , Ann Arbor , Michigan , United States )
  • Neiva, Gisele  ( University of Michigan , Ann Arbor , Michigan , United States ;  University of Michigan , Ann Arbor , Michigan , United States )
    • This study was funded by a research grant from Meisinger USA.
    NONE
    Oral Session
    Keynote Address; Chipping of Veneering Ceramics in Zirconium Dioxide Fixed Dental Prosthesis
    Wednesday, 03/16/2016 , 02:30PM - 04:00PM
    Tukey multiple comparisons
    Outcome GroupsIPS Empress CADe.max CADCeltra Duo
    3D roughness (Sa)2-1NA-0.95*-1.23*
     3-1-0.78*-1.06*-1.24*
     4-1-0.92*-1.08*-1.24*
     3-2NA-0.11*-0.006
     4-2NA-0.13*-0.009
     4-3-0.15-0.01-0.002
    Gloss (gloss units)2-1NA29.25*59.47*
     3-120.77*36.24*40.54*
     4-116.13*35.61*46.94*
     3-2NA6.99*-18.93*
     4-2NA6.36-12.53*
     4-3-4.64*-0.636.40*
    Groups: 1=baseline, 2=glazed, 3=DS, 4=DP (* p<0.05)