IADR Abstract Archives

Comparison of Different RMGI Cements Bond Strength to Zirconia

Objectives: To measure the bond durability of a new resin-reinforced glass ionomer cement to zirconia compared to other cements on the market.
Methods: Zirconia slabs 14 mm x 3 mm thick were prepared from GC Initial Zirconia HT, mounted in acrylic and finished with 600-grit diamond discs (6MB8, 3M) before sandblasting with 50 µm alumina at 3 bar pressure. Materials tested were FujiCEM Evolve (FCE, GC America), Meron Plus QM (MQM, VOCO), Nexus RMGI (NEX, Kerr Dental), RelyX Luting Plus (RLP, 3M). Specimens (n=8, N=64) were made using the Ultradent molds and jig according to ISO 29022:2013 to create 2.38 mm diameter cylinders on the substrates and allowed to cure for 10 minutes at 37C and 99% humidity and then stored for 24H in 37C deionized water and another group was cycled between 5 and 55C for 5000 cycles and tested with an Instron 5866 at a crosshead speed of 1 mm/min. Means and standard deviations were determined. Data were analyzed by ANOVA and Fisher’s PLSD at the 0.05 level of significance.
Results: FCE showed significantly higher bond strength than other cements before and after thermocycling. NEX showed significantly lower bond strength after thermocycling.
Conclusions: FujiCEM Evolve had the highest bond strength to zirconia of all RMGI cements tested.
IADR/AADR/CADR General Session
2020 IADR/AADR/CADR General Session (Washington, D.C., USA)
Washington, D.C., USA
2020
1316
Dental Materials 4: Adhesion
  • Cowen, Matt  ( Dental Consultants, Inc. , Ann Arbor , Michigan , United States )
  • Joshi, Gaurav  ( GC America Inc. , Alsip , Illinois , United States )
  • Heiss, Mark  ( GC America Inc. , Alsip , Illinois , United States )
  • Cunha, Samantha  ( Dental Consultants, Inc. , Ann Arbor , Michigan , United States )
  • Powers, John  ( Dental Consultants, Inc. , Ann Arbor , Michigan , United States )
    • GC America
    Funding for the study was provided by GC America.
    Poster Session
    Bonding to Restorative Materials
    Shear Bond Strength to Zirconia, MPa*
    FCE24h15.3(2.8)
    5000TC18.7(3.7)
    MQM24h4.0(2.1)
    5000TC5.8(1.8)
    NEX24h10.3(2.1)
    5000TC0.5(0.6)
    RLP24h7.8(1.3)
    5000TC11.3(3.6)
    All means were significantly different. Fisher’s PLSD intervals at the 0.05 level of significance for comparisons of means among products and between 24h and TC were 1.8 MPa and 1.2 MPa, respectively.