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Joining Veneers to Ceramic Cores and Dentition with Adhesive Interlayers

Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-2115, USA; and
¹ Materials Science and Engineering Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Bldg. 223, Gaithersburg, MD 20899-8520, USA

^* corresponding author, brian.lawn{at}nist.gov

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.

KEY WORDS: adhesive joining • glass • contact loading • veneer failure

This article has been cited by other articles:

				J.J.-W. Lee, J.-Y. Kwon, S. Bhowmick, I.K. Lloyd, E.D. Rekow, and B.R. Lawn Veneer vs. Core Failure in Adhesively Bonded All-ceramic Crown Layers J. Dent. Res., April 1, 2008; 87(4): 363 - 366. [Abstract] [Full Text] [PDF]