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Journal of Dental Research, Vol 70, 154-157, Copyright © 1991 by International & American Associations for Dental Research Online Journals

ARTICLES

Photo-activation of resin cements through porcelain veneers

J. J. Linden, E. J. Swift Jr, D. B. Boyer and B. K. Davis
College of Dentistry, University of Iowa, Iowa City 52242.

The purpose of this study was to determine the effects of porcelain opacity, chemical catalyst, and exposure time on polymerization of light-activated resin-composite cements. Samples of microfill and hybrid composites, with and without catalyst (i.e., dual-cure and visible-light-activated), were polymerized by exposure to visible light through porcelain discs of different opacities. Microhardness testing (KHN) was used to compare degree of cure for each material at various exposure times. Porcelain opacity did not significantly affect hardness. However, the results indicated that a chemical catalyst and prolonged curing times might be essential for clinical success.




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