Joias, Renato MoralesTango, Rubens Nisie [UNESP]Junho de Araujo, Jose EduardoJunho de Araujo, Maria AmeliaFerreira Anzaloni Saavedra, Guilherme de Siqueirade Arruda Paes-Junior, Tarcisio JoseKimpara, Estevão Tomomitsu [UNESP]2014-05-202014-05-202008-01-01Journal of Prosthetic Dentistry. New York: Mosby-elsevier, v. 99, n. 1, p. 54-59, 2008.0022-3913http://hdl.handle.net/11449/22790Statement of problem. Different combinations of Co-Cr alloys bonded to ceramic have been used in dentistry; however, the bond strength of ceramic to metal can vary because of different compositions of these alloys.Purpose. The purpose of this study was to evaluate the shear bond strength of a dental ceramic to 5 commercially available Co-Cr alloys.Material and methods. Five Co-Cr alloys (IPS d.SIGN 20, IPS d.SIGN 30, Remanium 2000, Heranium P, and Wirobond C) were tested and compared to a control group of an Au-Pd alloy (Olympia). Specimen disks, 5 mm high and 4 mm in diameter, were fabricated with the lost-wax technique. Sixty specimens were prepared using opaque and dentin ceramics (VITA Omega 900), veneered, 4 mm high and 4 mm in diameter, over the metal specimens (n = 10). The shear bond strength test was performed in a universal testing machine with a crosshead speed of 0.5 mm/min. After shear bond testing, fracture surfaces were evaluated in a stereomicroscope under x25 magnification. Ultimate shear bond strength (MPa) data were analyzed with 1-way ANOVA and the Tukey HSD test (alpha = .05).Results. The mean (SID) bond strengths (MPa) were: 61.4 (7.8) for Olympia; 94.0 (18.9) for IPS 20; 96.8 (10.2) for I PS 30; 75.1 (12.4) for Remanium; 71.2 (14.3) for Heranium P; and 63.2 (10.9) for Wirobond C. Mean bond strengths for IPS 20 and IPS 30 were not significantly different, but were significantly (P<.001) higher than mean bond strengths for the other 4 alloys, which were not significantly different from each other.Conclusions. Bond strength of a dental ceramic to a Co-Cr alloy is dependent on the alloy composition.54-59engArtigo10.1016/S0022-3913(08)60009-8WOS:000252565500011Acesso restrito913871668044060309679163886657540000-0003-0586-46440000-0003-0946-1826