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Processing and Development of Nano-Scale HA coatings for Biomedical Application

Published online by Cambridge University Press:  01 February 2011

Afsaneh Rabiei  and
Brent Thomas
Afsaneh Rabiei*
Affiliation:
Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC, 27695-7910, U.S.A.
Brent Thomas
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC, 27695-7910, U.S.A.
*
* Corresponding Author
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Abstract

Functionally graded Hydroxyapatite coating with graded Crystallinity across the thickness of the film has been processed and tested as a more effective orthopedic/ dental implant coating. The present study aims to increase the service-life of an orthopedic/ dental implant by creating materials that form a strong, long lasting, bond with the Ti substrate as well as juxtaposed bone. The health relatedness of the new material is to increase bonding between an implant and juxtaposed bone so that a patient who has received joint or dental replacement surgery may quickly return to a normal active lifestyle. Cross-sectional transmission electron microscopy analysis displayed that the films have a graded crystal structure with the crystalline layer near the substrate and the amorphous layer at the top surface. Compositional analysis was performed using SEM-EDX at the top surface as well as STEM-EDX at the cross section of the film. The average calcium to phosphorous ratio at the surface is 1.46, obtained by SEM-EDX. The Ca/P ratios in the crystalline and amorphous layers of the film are 1.6 to 1.7, close to the ratio of 1.67 for HA.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 845: Symposium AA – Nanoscale Materials Science in Biology and Medicine , 2004 , AA9.7
Copyright
Copyright © Materials Research Society 2005

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