Journal of Dental Research, Vol 66, 1460-1465, Copyright © 1987 by International & American Associations for Dental Research Online Journals
Shear strength of the composite bond to etched porcelain
I. Stangel, D. Nathanson and C. S. Hsu
The shear bond strength of composite resin to porcelain was investigated to
optimize variables for bonding porcelain laminate veneers. Scanning
electron microscopy was initially used to examine the surface configuration
of porcelain prepared under various conditions. A factorial experiment was
undertaken to determine the effects of three different bonding methods on
both etched and non-etched porcelain. Composite resin was bonded to the
porcelain groups using (a) unfilled resin, (b) silane, and (c) silane with
dentin adhesive. The results indicated a significant difference in shear
bond strength for the three bonding groups, depending on the porcelain
surface condition. For the unetched samples, significant differences in
bond strength were obtained for all three bonding conditions. However, for
the etched group, there were no differences between the silane and
silane-with-dentin-adhesive groups. Porcelain etching significantly
increased bond strength across all three bonding methods and was the main
contributor to the obtained values.
