The rate of post-exposure polymerization and the effects of initial polymerization on the final polymerization of visible light-activated composite resin were studied. The extent of polymerization, as indicated by hardness values, was influenced by the exposure time to the photo-activating radiation and by the post-exposure time. The timing of testing is critical when studying the properties of visible light-activated composite resins.
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References
1.
Salako, N.O. and Cruickshanks-Boyd , D.W.: Curing Depths of Materials Polymerized by Ultraviolet Light, Br Dent J146:375-379,1979.
2.
de Lange, C.; Bausch, J.R.; and Davidson , C.L.: The Curing Pattern of Photo-initiated Dental Composite, J Oral Rehabil7:369-377, 1980.
3.
Cook, W.D.: Factors Affecting Depth of Cure of UV-Polymerized Composites, JDent Res59:800-808, 1980.
4.
Kilian, R.J. : Visible Light Cured Composites: Dependence of Cure on Light Intensity, IADR Progr & Abst58:No. 603, 1979.
5.
Kilian, R.J. and Muller, TJ: Light Cured Composites: Dependence of Test Results on Test Parameters, AADR Progr & Abst59:No. 203,1980.
6.
Tirtha, R.; Fan, P.L.; Dennison, J.B.; and Powers, J.M.: In vitro Depth of Cure of Photo-activated Composites, J Dent Res61:1184-1187, 1982.
7.
Sokal, R.R. and Rohlf, F.J.; Biometry, San Francisco, CA: W.H. Freeman and Co., 1969, p. 239.
8.
Sperati, C.A. ; Franta, W.A.; and Starkweather , H.W.: The Molecular Structure of Polyethylene. The Effect of Chain Branching and Molecular Weight on Physical Properties, JAm Chem Soc75:6127-6133, 1953 .
9.
Billmeyer, F.W. , Jr.: Textbook of Polymer Science, New York: Interscience Publishers, 1962, pp. 221-226.
10.
Kilian, R.J. : The Application of Photochemistry to Dental Materials, Chemtech11:678-680, 1980.
