ORIGINAL ARTICLE   

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

DOI: 10.23736/S0026-4970.19.04210-9

Copyright © 2019 EDIZIONI MINERVA MEDICA

language: English

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