Metal-porcelain bonding to a magnetizable alloy.
The bond strength of porcelain to a magnetizable Pd-Co alloy was compared with that of a precious and nonprecious ceramic alloy by using the four-point flexure test and a direct shear test. The test procedure consisted of continuous loading until a bond failure occurred. The fractured surfaces were then examined with a scanning electron microscope. A good strength of the magnetizable Pd-Co alloy comparable to that of two specific ceramic alloys and intermediate between precious and nonprecious alloys was observed. Most of the failures of the precious alloy occurred at the oxide-porcelain interface. The preferential fracture paths were observed for the nonprecious alloy between the metal fracture and the oxide layer. The fractures of the magnetizable alloy occurred at the oxide-porcelain interface and in the bulk of the porcelain, clearly pointing out the possibility of using magnetizable Pd-Co alloy for metal ceramic abutment crowns.
Pezzoli
M
M
University of Torino, Italy.
Angelini
E
E
Bruzzone
G
G
D003035:Cobalt; D003722:Dental Alloys; D001840:Dental Bonding; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D008280:Magnetics; D010165:Palladium
D003722:Dental Alloys; D003776:Dental Porcelain; D003035:Cobalt; D010165:Palladium