Light-emitting diode (LED) polymerisation of dental composites: flexural properties and polymerisation potential

Stahl, Franka, Ashworth, Stephen H. ORCID:, Jandt, Klaus D. and Mills, Robin W. (2000) Light-emitting diode (LED) polymerisation of dental composites: flexural properties and polymerisation potential. Biomaterials, 21 (13). pp. 1379-1385. ISSN 1878-5905

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The clinical performance of light polymerised dental composites is greatly influenced by the quality of the light-curing unit (LCU) used. Commonly used halogen LCUs have some specific drawbacks such as decreasing of the light output with time. This may result in low degree of monomer conversion of the composites with negative clinical implications. Previous studies have shown that blue-light-emitting diode (LED) LCUs have the potential to polymerise dental composites without having the drawbacks of halogen LCUs. Despite the relatively low irradiance of current LED LCUs, their efficiency is close to that of conventional halogen LCUs with more than twice the irradiance. This phenomenon has not been explained fully yet. Hence, more tests of the LED LCU's effectiveness and of the mechanical properties of oral biomaterials processed with LED LCUs need to be carried out. This study investigates the flexural properties of three different composites with three different shades, which were polymerised with either a commercial halogen LCU or an LED LCU, respectively. In most cases no significant differences in flexural strength and modulus between composites polymerised with a halogen LCU or an LED LCU, respectively, were found. A simple model for the curing effectiveness based on the convolution absorption spectrum of the camphorquinone photoinitiator present in composites and the emission spectra of the LCUs is presented

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
UEA Research Groups: Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
Faculty of Science > Research Groups > Physical and Analytical Chemistry (former - to 2017)
Depositing User: Rachel Smith
Date Deposited: 18 Apr 2011 10:02
Last Modified: 24 Oct 2022 03:56
DOI: 10.1016/S0142-9612(00)00029-6

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