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Dense/Porous Layered Hydroxylapatite Ceramic for Orthopedic Device Coating Prepared by Tape Casting Technique

Dense/Porous Layered Hydroxylapatite Ceramic for Orthopedic Device Coating Prepared by Tape... A possible surgical technique in the replacement of a traumatized hip joint by a prosthesis system is to connect the acetabular component of the implant directly with pelvis bone tissue, without use of bone cement. It is possible to improve the osteointegration process and to ensure a better connection with bone tissue by coating the outside implant surface with a biocompatible ceramic. The best choice for a bioceramic coating is porous hydroxylapatite because its surface shows bonding-osteogenesis properties much higher than other materials. Here, a double HAp layer has been made by tape casting technology. The first layer was a high porous HAp ceramic with high osteophilic-osteoconductive characteristics. Because the scale of porosity was relatively insensitive to slurry composition and sintering temperature such a microstructure was produced using a particular technique described here. The second layer was dense HAp ceramic that resulted a substrate able to improve the mechanical properties of the brittle porous HAp layer. Several microstructure-designed ceramic coatings having the porous part with a controlled porosity can be obtained by tape casting using the same technique. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advanced Performance Materials Springer Journals

Dense/Porous Layered Hydroxylapatite Ceramic for Orthopedic Device Coating Prepared by Tape Casting Technique

Carotenuto, G.
Advanced Performance Materials , Volume 5 (3) – Oct 1, 2004
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11 pages

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Publisher
Springer Journals
Copyright
Copyright © 1998 by Kluwer Academic Publishers
Subject
Engineering; Automotive Engineering; Characterization and Evaluation of Materials; Classical Mechanics; Metallic Materials
ISSN
0929-1881
eISSN
1572-8765
DOI
10.1023/A:1008626330162
Publisher site
See Article on Publisher Site

Abstract

A possible surgical technique in the replacement of a traumatized hip joint by a prosthesis system is to connect the acetabular component of the implant directly with pelvis bone tissue, without use of bone cement. It is possible to improve the osteointegration process and to ensure a better connection with bone tissue by coating the outside implant surface with a biocompatible ceramic. The best choice for a bioceramic coating is porous hydroxylapatite because its surface shows bonding-osteogenesis properties much higher than other materials. Here, a double HAp layer has been made by tape casting technology. The first layer was a high porous HAp ceramic with high osteophilic-osteoconductive characteristics. Because the scale of porosity was relatively insensitive to slurry composition and sintering temperature such a microstructure was produced using a particular technique described here. The second layer was dense HAp ceramic that resulted a substrate able to improve the mechanical properties of the brittle porous HAp layer. Several microstructure-designed ceramic coatings having the porous part with a controlled porosity can be obtained by tape casting using the same technique.

Journal

Advanced Performance Materials – Springer Journals

Published: Oct 1, 2004

References

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