Journal of Dental Research, Vol 66, 1636-1639, Copyright © 1987 by International & American Associations for Dental Research Online Journals

ARTICLES

Setting stress in composite resin in relation to configuration of the restoration

A. J. Feilzer, A. J. De Gee and C. L. Davidson
Department of Clinical Materials Science, ACTA, University of Amsterdam, The Netherlands.

The setting stress in composite resins was studied as a function of restoration shape. The shape is described by the configuration factor, C, the ratio of the restoration's bonded to unbonded (free) surfaces. In an experimental set-up, the shape of the restoration was simulated by cylindrical forms of various dimensions. The shrinkage stress was measured continuously. It was shown that in most of the clinically relevant cavity configurations, the stress-relieving flow is not sufficient to preserve adhesion to dentin by dentin-bonding agents.

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