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Probing the Origins and Control of Shrinkage Stress in Dental Resin-Composites: 1. Shrinkage Stress Characterization Technique

Published

Author(s)

H Lu, J W. Stansbury, Sabine H. Dickens, F Eichmiller, Christopher N. Bowman

Abstract

The accurate and reliable characterization of the polymerization shrinkage stress is becoming increasingly important, as shrinkage stresses developing during free radiacal polymerization of current dimethacrylate-based dental materials are still a major drawback. The purpose of this research was to develop a shrinkage stressmeasurement device, which is capable of studying the shrinkage stress evolution of ligh-cured or chemical-cured composites while allowing for controlled sampledeformation during the polymerization. Furthermore, the device was designed to mimic clinically relevant cuspt-to-cusp displacement by systematically adjusting the instrument compliance, the ratio of bonded surface area to unbonded area by sample geometry, and the total bonded area by sample diameter. The newly developed stress measurement device based on the cantilever beam deflection theory has been characterized using a commercial dental composite.
Citation
Journal of Materials Science-Materials in Medicine
Volume
15
Issue
No. 10

Keywords

cantilever beam tensometer, dental composites, polymerization contraction stress

Citation

Lu, H. , Stansbury, J. , Dickens, S. , Eichmiller, F. and Bowman, C. (2004), Probing the Origins and Control of Shrinkage Stress in Dental Resin-Composites: 1. Shrinkage Stress Characterization Technique, Journal of Materials Science-Materials in Medicine (Accessed July 22, 2024)

Issues

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Created September 30, 2004, Updated October 12, 2021