Bio-inspired dental multilayers : Effects of layer architecture on the contact-induced deformation

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

42 Scopus Citations
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Author(s)

  • J. Du
  • X. Niu
  • N. Rahbar
  • W. Soboyejo

Detail(s)

Original languageEnglish
Pages (from-to)5273-5279
Journal / PublicationActa Biomaterialia
Volume9
Issue number2
Publication statusPublished - Feb 2013

Abstract

The ceramic crown structures under occlusal contact are idealized as flat multilayered structures that are deformed under Hertzian contact loading. Those multilayers consist of a crown-like ceramic top layer, an adhesive layer and the dentin-like substrate. Bio-inspired design of the adhesive layer proposed functionally graded multilayers (FGM) that mimic the dentin-enamel junction in natural teeth. This paper examines the effects of FGM layer architecture on the contact-induced deformation of bio-inspired dental multilayers. Finite element modeling was used to explore the effects of thickness and architecture on the contact-induced stresses that are induced in bio-inspired dental multilayers. A layered nanocomposite structure was then fabricated by the sequential rolling of micro-scale nanocomposite materials with local moduli that increase from the side near the soft dentin-like polymer composite foundation to the side near the top ceramic layer. The loading rate dependence of the critical failure loads is shown to be well predicted by a slow crack growth model, which integrates the actual mechanical properties that are obtained from nanoindentation experiments. © 2012 Acta Materialia Inc.

Research Area(s)

  • Bio-inspired design, Finite element method, Functionally graded multilayers, Slow crack growth

Citation Format(s)

Bio-inspired dental multilayers: Effects of layer architecture on the contact-induced deformation. / Du, J.; Niu, X.; Rahbar, N. et al.
In: Acta Biomaterialia, Vol. 9, No. 2, 02.2013, p. 5273-5279.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review