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* Corresponding author. Tel.:##44-117-928-4418; fax:##44-117-E-mail address: K.Jandt@bris.ac.uk (K.D. Jandt).

Summary: * Corresponding author. Tel.:##44-117-928-4418; fax:##44-117-
E-mail address: K.Jandt@bris.ac.uk (K.D. Jandt).
Biomaterials 21 (2000) 1379}1385
Light-emitting diode (LED) polymerisation of dental composites:
#exural properties and polymerisation potential
Franka Stahl , Stephen H. Ashworth , Klaus D. Jandt *, Robin W. Mills
University of Rostock Dental School, Strempelstrasse 13, D-18057 Rostock, Germany
The School of Chemical Sciences, University of East Anglia, Norwich NR7 4TJ, UK
Department of Oral and Dental Science, Dental Materials Science and Biomaterials Section, University of Bristol,
Lower Maudlin Street, Bristol BS1 2LY, UK
Received 30 September 1999; accepted 17 January 2000
The clinical performance of light polymerised dental composites is greatly in#uenced by the quality of the light-curing unit (LCU)
used. Commonly used halogen LCUs have some speci"c 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 e$ciency 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 e!ectiveness
and of the mechanical properties of oral biomaterials processed with LED LCUs need to be carried out. This study investigates the


Source: Ashworth, Stephen H. - School of Chemical Sciences and Pharmacy, University of East Anglia


Collections: Chemistry