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Permanent link (DOI): https://doi.org/10.7939/R37G64

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Effects manufacturing method on surface mineralization of bioactive glasses Open Access

Descriptions

Other title
Subject/Keyword
mineralization
bioactive glasses
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Pirayesh, Hamidreza
Supervisor and department
John A. Nychka (Chemical and Materials Engineering)
Examining committee member and department
Dave Mitlin
Mark McDermott
Department
Department of Chemical and Materials Engineering
Specialization

Date accepted
2010-08-31T19:32:40Z
Graduation date
2010-11
Degree
Master of Science
Degree level
Master's
Abstract
Amorphous bioactive glass powders are used as bone-filling materials in many medical applications. Bioactivity is achieved through ion exchange with bodily fluids, leading to surface apatite mineral formation – a necessity for tissue development. Traditional fabrication is by melt-casting and grinding, however sol-gel synthesis is another method which directly produces powders with higher specific surface area and potential for increased ion exchange rates. In this study sol-gel derived powders were manufactured and compared with melt-cast powders to determine the effects of crystallinity, composition, and specific surface area on apatite formation. Powders were immersed in simulated body fluid as a function of time and the evolution of apatite minerals was characterized. Apatite formation was most significantly affected by powder composition, followed by specific surface area; merely having sodium in the powder was more influential than altering the surface area and/or atomic structure, yet high specific surface area was found to enhance reactions on crystalline powders.
Language
English
DOI
doi:10.7939/R37G64
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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