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EVALUATION OF DIELECTRIC CURING MONITORING INVESTIGATING LIGHT-CURING DENTAL FILLING COMPOSITES

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Author(s): Johannes Steinhaus | Bernhard Moeginger | Mandy Großgarten | Berenika Hausnerova

Journal: Materials Engineering
ISSN 1335-0803

Volume: 18;
Issue: 1;
Start page: 30;
Date: 2011;
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Keywords: Dental material | Photo-curing | Composite filling | Curing rate | Degree of cure | Dielectric analysis (DEA) | Curing depth

ABSTRACT
The aim of this study is the evaluation of a dielectric analysis (DEA) method monitoring the curing behaviour of a light curing dental filling material in real-time. The evaluation is to extract the influence of light intensity on the photo-curing process of dental composite filling materials. The intensity change is obtained by measuring the curing process at different sample depth. It could be shown that increasing sample thickness, and therefore exponentially decreasing light intensity, causes a proportional decrease in the initial curing rate. Nevertheless, the results give rise to the assumption that lower illumination intensities over a long period cause higher overall conversion, and thus better mechanical properties. This would allow for predictions of the impact of different curing-rates on the final mechanical properties.
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