Document Type
Article
Language
eng
Format of Original
7 p.
Publication Date
3-2015
Publisher
Elsevier Inc.
Source Publication
Materials Science and Engineering: C
Source ISSN
0928-4931
Original Item ID
DOI: 10.1016/j.msec.2014.11.020
Abstract
Although magnesium (Mg) is a unique biodegradable metal which possesses mechanical property similar to that of the natural bone and can be an attractive material to be used as orthopedic implants, its quick corrosion rate restricts its actual clinical applications. To control its rapid degradation, we have modified the surface of magnesium implant using fluoridated hydroxyapatite (FHA: Ca10(PO4)6OH2 − xFx) through the combined micro-arc oxidation (MAO) and electrophoretic deposition (EPD) techniques, which was presented in our previous paper. In this article, the biocompatibility examinations were conducted on the coated AZ91 magnesium alloy by implanting it into the greater trochanter area of rabbits. The results of the in vivo animal test revealed a significant enhancement in the biocompatibility of FHA/MAO coated implant compared to the uncoated one. By applying the FHA/MAO coating on the AZ91 implant, the amount of weight loss and magnesium ion release in blood plasma decreased. According to the histological results, the formation of the new bone increased and the inflammation decreased around the implant. In addition, the implantation of the uncoated AZ91 alloy accompanied by the release of hydrogen gas around the implant; this release was suppressed by applying the coated implant. Our study exemplifies that the surface coating of magnesium implant using a bioactive ceramic such as fluoridated hydroxyapatite may improve the biocompatibility of the implant to make it suitable as a commercialized biomedical product.
Recommended Citation
Razavi, Mehdi; Fathi, Mohammadhossein; Savabi, Omid; Vashaee, Daryoosh; and Tayebi, Lobat, "In vivo Assessments of Bioabsorbable AZ91 Magnesium Implants Coated with Nanostructured Fluoridated Hydroxyapatite by MAO/EPD Technique for Biomedical Applications" (2015). School of Dentistry Faculty Research and Publications. 165.
https://epublications.marquette.edu/dentistry_fac/165
Comments
Accepted version. Materials Science and Engineering: C, Vol 48 (March 2015): pg. 21-27. DOI. © 2015 Elsevier. Used with permission.
NOTICE: this is the author’s version of a work that was accepted for publication in Materials Science and Engineering: C. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Science and Engineering: C, Vol 48 (March 2015): pg. 21-27. DOI.