Shear bond strength evaluation of different veneering systems on Ni-Cr alloys.
OBJECTIVE
The aim of this study was to evaluate the shear bond strength of four esthetic veneering materials on nickel-chromium (Ni-Cr) alloy.


METHODS
Forty square patterns (10 x 10 x 1.5 mm) were cast with Ni-Cr, divided equally into four groups, and received four treatments for veneering: conventional porcelain-fused-to-metal (PFM), Artglass, Targis/Vectris, and Biodent light-cured prosthodontic composite resins. After sandblasting of the cast metal surfaces with 50 micro m alumina, the composites were applied to the surfaces according to manufacturers' recommendations. Shear bond strength was determined at a crosshead speed of 0.5 mm/min. Results were analyzed statistically with Kruskal-Wallis analysis of variance and multiple comparison tests.


RESULTS
Mean shear bond strength values were 34.96 MPa for PFM, 14.17 MPa for Targis/Vectris, 13.64 MPa for Artglass, and 10.56 MPa for Biodent. The PFM group exhibited significantly higher bond strength values compared with the other three groups (p < 0.001).


CONCLUSIONS
PFM showed considerably higher shear bond strength values than the three metal-resin bonding techniques.
Ciftçi
Yalçin
Y
Department of Prosthodontics, Faculty of Dentistry, University of Hacettepe, Ankara, Turkey. yalcin@optima.com.tr
Canay
Senay
S
Hersek
Nur
N
D000537:Aluminum Oxide / Q000737:chemistry; D002858:Chromium Alloys / Q000737:chemistry*; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003734:Dental Casting Investment / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry*; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D003801:Dental Veneers; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry; D033081:Shear Strength; D012823:Silicate Cement / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties
D002858:Chromium Alloys; D003722:Dental Alloys; D003734:Dental Casting Investment; D005899:Glass Ionomer Cements; D016876:Metal Ceramic Alloys; C111282:dental polyglass; D003776:Dental Porcelain; C058237:Biodent; D012823:Silicate Cement; C047040:Vita VMK 68; D000537:Aluminum Oxide