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Proceedings Paper

The measurement of polymerization shrinkage of composite resins with ESPI
Author(s): Zhang Zhang; Guo Biao Yang
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Paper Abstract

In the current study, we used the method of electronic speckle pattern interferometry (ESPI) to measure polymerization shrinkage of composite resins. Standardized cavities were prepared and placed into the ESPI apparatus before the cavities were filled with composites (n=2) .The ESPI apparatus was constructed to measure the out-of-plane displacement of the resins surface during the polymerization. Experiments demonstrated that the ESPI technique was a viable method to measure the deformation of composite resins. It was responsive and sensitive to dimensional changes. We found that cavity shape, size and C- factor influenced the date of resins shrinkage. And the tooth deformation in response to polymerization of resins was measured by the ESPI too. We concluded that ESPI was a feasible method for assessing resins deformation induced by its polymerization shrinkage when it was bonded in tooth cavities. And the results were greatly influenced by the dimensions of cavities , or interface adhesive and so on. It could also measure the tooth deformation induced by shrinkage of bonded composite resins. We found that resins polymerization shrinkage date may overestimate shrinkage-induced tooth deformation.

Paper Details

Date Published: 3 October 2008
PDF: 9 pages
Proc. SPIE 7155, Ninth International Symposium on Laser Metrology, 71552I (3 October 2008); doi: 10.1117/12.814592
Show Author Affiliations
Zhang Zhang, Tongji Univ. (China)
Guo Biao Yang, Tongji Univ. (China)

Published in SPIE Proceedings Vol. 7155:
Ninth International Symposium on Laser Metrology
Chenggen Quan; Anand Asundi, Editor(s)

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