Joining veneers to ceramic cores and dentition with adhesive interlayers.
Adhesive joining of veneers to cores offers potential simplicity and economy in the fabrication of all-ceramic crowns. We tested the hypothesis that resin-based adhesives can be used for such fabrication without compromising mechanical integrity of the crown structure. A simple test procedure for quantifying this hypothesis was proposed. A model glass veneer layer 1 mm thick (representative of porcelain), adhesively bonded onto a glass-like core substrate (ceramic or dental enamel), was loaded at its top surface with a hard sphere (occlusal force) until a radial crack initiated at the veneer undersurface. The critical loads for fracture, visually observable in the transparent glass, afforded a measure of the predisposition for the adhesive to cause veneer failure in an occlusal overload. Two adhesives were tested, one a commercial epoxy resin and the other a relatively stiff in-house-developed composite. The results confirmed that stiffer adhesives provide higher resistance to failure.
Lee
J J-W
JJ
Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-2115, USA.
Wang
Y
Y
Lloyd
I K
IK
Lawn
B R
BR
D019245:Compressive Strength; D003442:Crowns; D001840:Dental Bonding; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D003801:Dental Veneers; D004548:Elasticity; D005898:Glass; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry
D019279:Resin Cements; D003776:Dental Porcelain