Comparative In Vitro Study of the Bond Strength of Composite to Carbon Fiber Versus Ceramic to Cobalt–Chromium Alloys Frameworks for Fixed Dental Prostheses
Rocio Cascos-Sanchez,
Pedro Molinero-Mourelle,
Rocio Ortega,
Ruben Agustin-Panadero,
Jaime Del Rio Highsmith,
Miguel Gomez-Polo
Affiliations
Rocio Cascos-Sanchez
Department of Conservative Dentistry and Orofacial Prosthetics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, Spain
Pedro Molinero-Mourelle
Department of Conservative Dentistry and Orofacial Prosthetics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, Spain
Rocio Ortega
Department of Prosthetic Dentistry, Faculty of Dentistry, European University of Madrid, 28670 Madrid, Spain
Ruben Agustin-Panadero
Department of Stomatology, Faculty of Medicine and Dentistry, University of Valencia, 46010 Valencia, Spain
Jaime Del Rio Highsmith
Department of Conservative Dentistry and Orofacial Prosthetics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, Spain
Miguel Gomez-Polo
Department of Conservative Dentistry and Orofacial Prosthetics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, Spain
Purpose: The aim of this comparative in vitro study was to assess the bond strength and mechanical failure of carbon-fiber-reinforced composites against cobalt–chrome structures with ceramic veneering. Materials and methods: A total of 24 specimens (12 per group) simulating dental prosthetic frameworks were fabricated. The experimental specimens were subjected to a thermocycling aging process and to evaluate bond strength. All specimens were subjected to a three-point bending test to fracture using a universal testing machine. Results: The cobalt–chrome/ceramic group yielded a bond strength value of 21.71 ± 2.16 MPa, while the carbon-fiber-reinforced composite group showed 14.50 ± 3.50 MPa. The failure assessment reported statistical significance between groups. Although carbon-fiber-reinforced composite group showed lower bond strength values, the chipping incidence in this group was as well lower. Conclusions: The chrome–cobalt/ceramic group showed greater bonding strength compared to the carbon-fiber-reinforced composite; most of the fractures within the cobalt–chrome/ceramic group, had no possibility of direct clinical repair.
