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Minerva Stomatologica 2019 October;68(5):259-64

DOI: 10.23736/S0026-4970.19.04210-9

Copyright © 2019 EDIZIONI MINERVA MEDICA

lingua: Inglese

Effect of metal primers on the bond strength of resin cement to Co-Cr alloy

Eloisa H. ARANDA GARCIA de SOUZA, Sandrine B. BERGER, Eloisa A. CARLESSE PALOCO, Rodrigo V. CAIXETA, Thais S. MORETTO, Murilo B. LOPES, Alcides GONINI Jr, Ricardo D. GUIRALDO

Department of Restorative Dentistry, School of Dentistry, University of North Parana (UNOPAR), Londrina, Brazil



BACKGROUND: To evaluate the effects of adhesive systems and primer systems on microshear bond strength of chemically activated resin cemented to Co-Cr cast dental alloy.
METHODS: Seventy-two rectangular blocks of Co-Cr metal alloy were manufactured and air-abraded with 50-μm Al2O3 particles. Metal primers (alloy primer [AP] or Clearfil ceramic primer [CP]) and adhesives (Adper Scotchbond Multi-Purpose Adhesive activated by Adper Scotchbond Multi-Purpose Adhesive Catalyst [SASC], or Primer & Bond 2.1 activated by Self Cure Activator [PBCA]) were applied and subsequently divided into six groups (SASC; AP+SASC; CP+SASC; PBCA; AP+PBCA; CP+PBCA; N.=12). Then, resin cement (Enforce) was applied. Data about microshear bond strength values were statistically evaluated by analysis of variance and Tukey’s test.
RESULTS: The bond strength was lower (P<0.001) in groups with adhesive system alone (SASC and PBCA) compared with groups with addition of primers alloy primer (AP+SASC and AP+PBCA) and ceramic primer (CP+SASC and CP+PBCA).
CONCLUSIONS: The application of primers improves the bond strength of the cement resin to the Co-Cr metal alloy.


KEY WORDS: Shear strength; Adhesives; Dental alloys; Resin cements

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