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.
Original language | English (US) |
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Pages (from-to) | 5273-5279 |
Number of pages | 7 |
Journal | Acta Biomaterialia |
Volume | 9 |
Issue number | 2 |
DOIs | |
State | Published - Feb 2013 |
All Science Journal Classification (ASJC) codes
- Biotechnology
- Biomaterials
- Biochemistry
- Biomedical Engineering
- Molecular Biology