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Mechanical properties of methacrylate-based model dentin adhesives: Effect of loading rate and moisture exposure
Singh, Viraj Misra, Anil Parthasarathy, Ranganathan Ye, Qiang Park, Jonggu Spencer, Paulette
Singh, Viraj
Misra, Anil
Parthasarathy, Ranganathan
Ye, Qiang
Park, Jonggu
Spencer, Paulette
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Abstract
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.
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Date
2013-11
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Publisher
Wiley
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Keywords
Dentin adhesives, Creep, Rate-dependence, Moisture
Citation
Singh V, Misra A, Parthasarathy R, Ye Q, Park J, Spencer P. 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.