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Mechanical properties of methacrylate‐based model dentin adhesives: Effect of loading rate and moisture exposure
Author(s) -
Singh Viraj,
Misra Anil,
Parthasarathy Ranganathan,
Ye Qiang,
Park Jonggu,
Spencer Paulette
Publication year - 2013
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.32963
Subject(s) - materials science , composite material , creep , viscoelasticity , adhesive , dentin , moisture , shrinkage , deformation (meteorology) , layer (electronics)
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. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 101B: 1437–1443, 2013.