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1915 |
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Wednesday, May 05, 2010, Olivia Room 9:00 AM Modeling and Simulation 1 |
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Microstructural modeling and performance simulation of engineered bio composites |
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Christopher Berndt* / IRIS, Faculty of Engineering and Industrial Sciences
Swinburne Uni. of Technology, Mail H66, AUSTRALIA Ulrike Tietz / Institut für Biomedizinische Technik, Germany Klaus-Peter Schmitz/ Institut für Biomedizinische Technik, Germany |
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A primary goal in modern orthopaedics is increasing the rate and long-lasting anchoring of implants in the human body. Hydroxyapatite, having a chemical structure and chemistry that is identical to bone, significantly enhances the ongrowth and subsequent ingrowth of natural bone material. Nevertheless some aspects of the performance of hydroxyapatite coatings have not been investigated sufficiently; for example the in vivo, long-term behaviour of the material, including the time-dependent dissolution accompanied by changes of mechanical properties have been poorly documented. The current study creates an idealized, virtual microstructural coating model that examines the time-dependent behaviour and properties of hydroxyapatite coatings. The analyses examine hold time vs. dissolution ? dependence that reflects actual vivo behaviour. Additional development of this model will enable the development of coatings that exhibit appropriate microstructures for long-term stability of coated orthopaedic and dental implants. |