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Mechanical Properties of Glass Reinforced Hydroxyapatite

Muslim Y.R., and Knowles, J., and Howlett, J., (2005) Mechanical Properties of Glass Reinforced Hydroxyapatite. Annals of Dentistry, 12 (1). pp. 31-36. ISSN 0128-7532

Full text not available from this repository.

Official URL: http://ejum.fsktm.um.edu.my/ArticleInformation.aspx?ArticleID=374

Affiliations

University College London. Eastman Dental Institute. Master of Clinical Dentistry (Prosthodontics),
University College London. Eastman Dental Institute. Dept. of Biomaterials
University College London. Eastman Dental Institute. Dept. of Prosthetics

Abstract

Hydroxyapatite (HA) has been increasingly used in biomedical applications due to its biocompatibility with living tissues. However, its use is limited to low load bearing areas due to the poor mechanical properties compared to bone. The aim of this project is to improve the mechanical properties of synthetic HA by optimising the processing method and also by using a phosphate based glass as a sintering aid to develop Glass Reinforced Hydroxyapatite (GR-HA). A phosphate based glass containing CaO, P2O5 and CaF2 was incorporated into HA at 2.5wt% and 5wt% additions during the milling process prior to sintering at 1300°C. The flexural strength mean values for GR-HA ranged from 80MPa to 110MPa. Pure HA exhibited a much lower flexural strength mean value ranging from 66MPa to 79MPa. The improved mechanical properties were associated with the occurrence of residual stress as a result of decomposition of HA to b-Tricalcium Phosphate (TCP) and in 5wt% GRHA to a-Tricalcium Phosphate (TCP).

Item Type:Journal
Keywords:hydroxyapatite, glass reinforced hydroxylate (2.5wt% & 5wt%)
Subjects:R Medicine, Dentistry, Pharmacy, Nursing
ID Code:1996

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