Mechanical properties of methacrylate-based model dentin adhesives: Effect of loading rate and moisture exposure
Article first published online: 7 JUN 2013
Copyright © 2013 Wiley Periodicals, Inc.
Journal of Biomedical Materials Research Part B: Applied Biomaterials
Volume 101, Issue 8, pages 1437–1443, November 2013
How to Cite
How to cite this article: 2013. Mechanical properties of methacrylate-based model dentin adhesives: Effect of loading rate and moisture exposure. J Biomed Mater Res Part B 2013:101B:1437–1443., , , , , .
- Issue published online: 22 OCT 2013
- Article first published online: 7 JUN 2013
- Manuscript Accepted: 10 APR 2013
- Manuscript Revised: 7 MAR 2013
- Manuscript Received: 28 NOV 2012
- National Institutes of Health/National Institute of Dental and Craniofacial Research. Grant Numbers: R01DE014392, 3R01DE014392-08S1, R01 DE022054
- dentin adhesive;
The aim of this study is to investigate the mechanical behavior of model methacrylate-based dentin adhesives under conditions that simulate the wet oral environment. A series of monotonic and creep experiments were performed on rectangular beam samples of dentin adhesive in three-point bending configuration under different moisture conditions. The monotonic test results show a significant effect of loading rate on the failure strength and the linear limit (yield point) of the stress-strain response. In addition, these tests show that the failure strength is low, and the failure occurs at a smaller deformation when the test is performed under continuously changing moisture conditions. The creep test results show that under constant moisture conditions, the model dentin adhesives can have a viscoelastic response under certain low loading levels. However, when the moisture conditions vary under the same low loading levels, the dentin adhesives have an anomalous creep response accompanied by large secondary creep and high strain accumulation. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 101B: 1437–1443, 2013.