Two innovative glass compositions based on the commonly used 45S5 Bioglass® were developed by increasing the calcium quan- tity and replacing the sodium oxide with a specific content of potassium oxide. The new glasses, named BG_Ca/K and BG_Ca/Mix, can be prepared using a conventional melting process and show a very low tendency to crystallize. Thanks to this peculiarity, BG_Ca/K and BG_Ca/Mix powders can be sintered at a relatively low temperature (800°C) to obtain sam- ples of high compactness and bioactivity, since their amorphous nature is preserved. Consequently, the proposed glasses are perfect for making specific products such as scaffolds or hydroxyapatite-based composites. Furthermore, the relatively low alkali amount in the new compositions gives rise to a slow ion leaching in simulated body fluid, thus avoiding abrupt changes in pH that can damage osteoblasts or negatively affect their behavior.

Low temperature sintering of innovative bioactive glasses / Bellucci, Devis; Sola, Antonella; Cannillo, Valeria. - In: JOURNAL OF THE AMERICAN CERAMIC SOCIETY. - ISSN 0002-7820. - STAMPA. - 95:(2012), pp. 1313-1319. [10.1111/j.1551-2916.2012.05100.x]

Low temperature sintering of innovative bioactive glasses

BELLUCCI, Devis;SOLA, Antonella;CANNILLO, Valeria
2012

Abstract

Two innovative glass compositions based on the commonly used 45S5 Bioglass® were developed by increasing the calcium quan- tity and replacing the sodium oxide with a specific content of potassium oxide. The new glasses, named BG_Ca/K and BG_Ca/Mix, can be prepared using a conventional melting process and show a very low tendency to crystallize. Thanks to this peculiarity, BG_Ca/K and BG_Ca/Mix powders can be sintered at a relatively low temperature (800°C) to obtain sam- ples of high compactness and bioactivity, since their amorphous nature is preserved. Consequently, the proposed glasses are perfect for making specific products such as scaffolds or hydroxyapatite-based composites. Furthermore, the relatively low alkali amount in the new compositions gives rise to a slow ion leaching in simulated body fluid, thus avoiding abrupt changes in pH that can damage osteoblasts or negatively affect their behavior.
2012
95
1313
1319
Low temperature sintering of innovative bioactive glasses / Bellucci, Devis; Sola, Antonella; Cannillo, Valeria. - In: JOURNAL OF THE AMERICAN CERAMIC SOCIETY. - ISSN 0002-7820. - STAMPA. - 95:(2012), pp. 1313-1319. [10.1111/j.1551-2916.2012.05100.x]
Bellucci, Devis; Sola, Antonella; Cannillo, Valeria
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/736854
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