Marginal Fit and Retention Strength of Zirconia Crowns Cemented by Self-adhesive Resin Cements

• DOI: 10.2341/16-367-l
• Publication Date: 2018-02-02T20:00:30Z
• Authors: R Pilo; M Folkman; A Arieli; S Levartovsky
• Keywords: Stereo microscope; Self adhesive

The absolute marginal gap (AMG) precementation and postcementation the retention of zirconia crowns cemented to standardized molar preparations (4×10) by self-adhesive resin cements (SARCs) were evaluated. following SARCs used: RelyX U-200 (RXU200; 3M ESPE, Seefeld, Germany), SmartCem 2 (SC2; Dentsply, Milford, DE, USA), G-Cem Automix (GCA; GC, Alsip, IL, USA). control adhesive cement was Panavia 21 (PAN; Kuraray Dental Co Ltd, Osaka, Japan). Twenty measuring locations at a constant interval along margins marked, AMG measured an image analysis system connected stereomicroscope (20×). copings aged 270 days 100% humidity 37°C then underwent 10,000 thermal cycles, 5°C-55°C. After aging, tested for retention, debonded surfaces examined 3× magnification. mean gaps 34.8 ± 17.4 μm 72.1 31 μm, respectively, with no statistically significant differences between cements. A difference ( p≤0.001) in found. highest values obtained SC2 GCA (1385 Pa 1229 Pa, respectively), but these presented differences. lowest found PAN RXU200 (738 489 showed predominant mode failure all groups mixed, correlations retention.