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Analyses of a Cantilever-Beam Based Instrument for Evaluating the Development of Polymerization Stresses

Published

Author(s)

Martin Y. Chiang, Anthony A. Giuseppetti, Joy P. Dunkers, Jing Qian, Sheng Lin-Gibson, Gary E. Schumacher, Joseph M. Antonucci

Abstract

Analytical and finite element analyses have been performed on a cantilever-beam based methodology (tensometer) for evaluating the development of stresses as the concomitant of constrained polymerization shrinkage. A guideline for designing a tensometer satisfying necessary requirements for the accuracy of evaluation have been provided on the basis of a formula for deducing the polymerization stresses (PS) and the instrument sensitivity to the presence of shrinkage. The result of PS evaluation on a commercial dental composite, using our new tensometer designed according to analyses, gives a right trend in the development of PS. This has demonstrated the importance of beam dimensions and relative rigidity of components in the tensometer system on the accuracy of the evaluation.
Citation
Dental Materials

Keywords

polymerization shrinkage, stress, tensometer, cantilever beam, dental composites

Citation

Chiang, M. , Giuseppetti, A. , Dunkers, J. , Qian, J. , Lin-Gibson, S. , Schumacher, G. and Antonucci, J. (2011), Analyses of a Cantilever-Beam Based Instrument for Evaluating the Development of Polymerization Stresses, Dental Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906870 (Accessed January 17, 2022)
Created August 9, 2011, Updated February 19, 2017