The effect of surface treatments on the bond strength of a nonprecious alloy-ceramic interface.
OBJECTIVE
The purpose of this study was to compare the effect of seven different alloy surface treatments on the bond strength of the porcelain-metal interface.


METHODS
Three layers of opaque porcelain and a measured thickness of dentin porcelain were applied to nickel-chromium alloy. A tensile bond strength test was used.


RESULTS
The alloy surface treatment that exhibited the highest bond strength was sandblast + surface grinding + sandblast + de-gas, whereas the alloy surface treatment that exhibited the lowest bond strength was sandblast + surface grinding + sandblast + steam cleaning + de-gas. There was a significant difference between the two methods (P < 0.05).


CONCLUSIONS
It was concluded that de-gassing the alloy prior to porcelain application increased the bond strength and excess surface grinding of the alloy reduced bond strength; steam cleaning the alloy surface prior to de-gassing and porcelain application also significantly reduced the bond strength.
Graham
J D
JD
Department of Restorative Dentistry, School of Clinical Dentistry, University of Sheffield, England.
Johnson
A
A
Wildgoose
D G
DG
Shareef
M Y
MY
Cannavina
G
G
D000704:Analysis of Variance; D003775:Dental Polishing / Q000379:methods*; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry*; D018709:Statistics, Nonparametric; D013499:Surface Properties; D013718:Tensile Strength
D016876:Metal Ceramic Alloys