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Effects of Backing Reflectance and Mold Size on Polymerization of Photo-activated Composite Resin

Council on Dental Materials, Instruments and Equipment, American Dental Association, Chicago, Illinois 60611

C.M. Stanford

Council on Dental Materials, Instruments and Equipment, American Dental Association, Chicago, Illinois 60611

W.B. Stanford

Council on Dental Materials, Instruments and Equipment, American Dental Association, Chicago, Illinois 60611

R. Leung

Department of Restorative Dentistry, School of Dentistry, University of Southern California, Los Angeles, California 90089-0641

J.W. Stanford

Council on Dental Materials, Instruments and Equipment, American Dental Association, Chicago, Illinois 60611

The in vitro depth of cure of a visible-light-activated microfilled composite, as influenced by backing reflectance and mold size, was investigated using microhardness measurements. More extensive polymerization was obtained with higher values of backing reflectance. Mold size larger than the cross-sectional area of the photo-activating beam also increased the degree of polymerization. Backing reflectance and mold size are influential factors and need to be defined in depth-of cure evaluations if in vitro measurements are to be valid predictors of clinical performance.

REFERENCES

• Asmussen, E. (1982): Restorative Resins: Hardness and Strength vs. Quantity of Remaining Double Bonds, Scand J Dent Res 90:484-489.[Medline] [Order article via Infotrieve]
• Sperati, C.A.; Franta, W.A.; and Starkweather, H.W., Jr. (1953): The Molecular Structure of Polyethylene. V. The Effect of Chain Branching and Molecular Weight on Physical Properties, J Am Chem Soc 75:6127-6133, 1953.[CrossRef]

Journal of Dental Research, Vol. 63, No. 10, 1245-1247 (1984)
DOI: 10.1177/00220345840630101601


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Fan, P.L. Articles by Stanford, J.W. Search for Related Content PubMed PubMed Citation Articles by Fan, P.L. Articles by Stanford, J.W. Social Bookmarking                         What's this?