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A mathematical model for post-irradiation hardening of photoactivated composite resins |
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| Authors: | W M Johnston R L Leung P L Fan |
| Affiliation: | 1. Section of Restorative Dentistry, College of Dentistry, Ohio State University Columbus, USA;2. Department of Restorative Dentistry, University of Southern California, USA;3. Council on Dental Materials, Instruments and Equipment, American Dental Association, 211 East Chicago Avenue, Chicago, Illinois 60611, USA |
| Abstract: | A generalized mathematical model for the post-irradiation hardness of photoactivated resins is presented. This model describes a ratio of hardness values as a function of time after irradiation. The low error and generalized character of the model indicate similarities in the post-irradiation hardening of adequately irradiated resins. Using a ratio of hardness at the bottom surface to the final hardness of the top surface, an inadequately irradiated resin can be identified by deviation from the generalized model. Such deviations are noted throughout the hardening process and are recommended as a means of readily identifying deficient photoactivation. |
| Keywords: | Acrylic resins hardness molecular weight polymers theoretical model |
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