𝔖 Bobbio Scriptorium
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Formation of a new bioactive glass-ceramic

✍ Scribed by Dean-Mo Liu; Hsien-Ming Chou

Publisher
Springer
Year
1994
Tongue
English
Weight
1021 KB
Volume
5
Category
Article
ISSN
0957-4530

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✦ Synopsis

A new bioactive glass-ceramic with a nominal composition of CaO (54.5), MgO (6.0), SiO2 (32.8), P2Os (6.1) and CaF 2 (0.6), by weight ratio, has been developed. The crystalline phases termed hydroxyfluoroxyapatite, akermanite, and wollastonite were found to be present simultaneously at a temperature of 930Β°C. Furthermore, no cracks appear after the bulk glass is crystallized. This newly developed glass-ceramic has an average flexural strength of 233 MPa and a fracture toughness of 2.95 MPa m 1/2, which are higher values than for dense hydroxyapatite and known glass-ceramic. An apatite layer containing Ca, P and Si is formed on the surface after the glass-ceramic is soaked in a simulated body fluid for a short aeriod of time, which is indicative of a high bioactivity.

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