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Journal of Dental Research
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Photo-activation of Resin Cements through Porcelain Veneers

J.J. Linden

College of Dentistry, The University of Iowa, Iowa City, Iowa 52242

E.J. Swift, Jr.

D.B. Boyer

College of Dentistry, The University of Iowa, Iowa City, Iowa 52242

B.K. Davis

College of Dentistry, The Ohio State University, Columbus, Ohio 43210

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.

Journal of Dental Research, Vol. 70, No. 2, 154-157 (1991)
DOI: 10.1177/00220345910700021201
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