INEB
INEB
TitleReinforcement of hydroxyapatite by adding P 2O 5-CaO glasses with Na 2O, K 2O and MgO
Publication TypeJournal Article
1996
AuthorsSantos, JD, Silva, PL, Knowles, JC, Talal, S, Monteiro, FJ
JournalJournal of Materials Science: Materials in MedicineJ. MATER. SCI. MATER. MED.
Volume7
Issue3London, United Kingdom
Pagination187 - 189
Date Published1996///
09574530 (ISSN)
article, Bending strength, Bone, chemical composition, Composite materials, Composition, Composition effects, glass, Glass composition, Glass reinforced hydroxapatite composite, hydroxyapatite, implant, Magnesium Oxide, metal oxide, Microstructure, molecular dynamics, Phosphates, potassium derivative, priority journal, Sintering, Sintering temperature, sodium derivative, Thermal effects, Trace Elements, Tricalcium phosphate phase, X ray diffraction
Commercial hydroxyapatite was reinforced by adding small amounts (2 and 4 wt%) of P 2O 5-based glasses during its sintering process. The composites prepared had a chemical composition closely related to the mineral part of bone tissues in terms of trace elements usually detected, such as Na, K and Mg. X-ray diffraction analysis (XRD) showed that the glass reinforced-HA composites were composed of a HA matrix and variable amounts of tricalcium phosphate phase, depending on sintering temperature and glass composition. These composites were shown to have much higher biaxial bending strength than sintered HA, 107 MPa for Ha/2% of 35P 2O 5-35CAO-10Na 2O-10K 2O-10MgO glass composite and 28 MPa for sintered HA. The presence of β-tricalcium phosphate in the microstructure of the composites is an important factor in the reinforcement process. Commercial hydroxyapatite was reinforced by adding small amounts (2 and 4 wt%) of P 2O 5-based glasses during its sintering process. The composites prepared had a chemical composition closely related to the mineral part of bone tissues in terms of trace elements usually detected, such as Na, K and Mg. X-ray diffraction analysis (XRD) showed that the glass reinforced-HA composites were composed of a HA matrix and variable amounts of tricalcium phosphate phase, depending on sintering temperature and glass composition. These composites were shown to have much higher biaxial bending strength than sintered HA, 107 MPa for Ha/2% of 35P 2O 5-35CaO-10Na 2O-10K 2O-10MgO glass composite and 28 MPa for sintered HA. The presence of β-tricalcium phosphate in the microstructure of the composites is an important factor in the reinforcement process.
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