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Sol–gel derived fluor-hydroxyapatite biocoatings on zirconia substrate

Paper ID Volume ID Publish Year Pages File Format Full-Text
13458 858 2004 8 PDF Available
Title
Sol–gel derived fluor-hydroxyapatite biocoatings on zirconia substrate
Abstract

Fluor-hydroxyapatite (FHA) film was coated on a zirconia (ZrO2) substrate by a sol–gel method. An appropriate amount of F ions was incorporated into the hydroxyapatite (HA) during the preparation of the sols. The apatite phase began to crystallize after heat treatment at 400°C, and increased in intensity above 500°C. No decomposition was detected by X-ray diffraction analyses up to 800°C, which illustrates the high thermal stability of the FHA films. The films showed a uniform and dense morphology with a thickness of ∼1 μm after a precisely controlled heat treatment process. These FHA films adhered firmly to the zirconia substrate, representing notable adhesion strengths of ∼70 MPa after heat treatment above 500°C. The dissolution rate of the FHA coating layer varied according to the heat treatment temperature, which was closely related to the film crystallinity. The dissolution rate of the FHA film was lower than that of the HA film, suggesting the possibility of a functional gradient coating of HA and FHA. The MG63 cells seeded onto the FHA films proliferated in a similar manner to those seeded onto pure HA ceramic and a plastic control.

Keywords
Fluor-hydroxyapatite (FHA) film; Sol–gel method; ZrO2 substrate; Adhesion strength; Dissolution rate; Cell proliferation
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Sol–gel derived fluor-hydroxyapatite biocoatings on zirconia substrate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 25, Issue 15, July 2004, Pages 2919–2926
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us