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Gellan/hydroxyapatite composites for preparation of temporary structures for bone reconstruction (Articolo in rivista)

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Gellan/hydroxyapatite composites for preparation of temporary structures for bone reconstruction (Articolo in rivista) (literal)

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13) Barbani N.1, Coluccio M.L.1, Guerra G.D.2, Ciardelli G.1, Ferri F.1, Krajewski A.3, Mazzocchi M.3, Ravaglioli A.3 (2004)
Gellan/hydroxyapatite composites for preparation of temporary structures for bone reconstruction
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13) Barbani N.1, Coluccio M.L.1, Guerra G.D.2, Ciardelli G.1, Ferri F.1, Krajewski A.3, Mazzocchi M.3, Ravaglioli A.3 (literal)

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1 Dip. Ing. Chim., Chim. Ind. e Sci. Mater., Università di Pisa; 2 IMCB-CNR, Pisa; £ ISTEC-CNR, Faenza (literal)

Titolo

Gellan/hydroxyapatite composites for preparation of temporary structures for bone reconstruction (literal)

Abstract

Gellan solution in hot water (1% w/v) was mixed with solid hydroxyapatite under stirring, and the hot suspensions rapidly quenched in liquid nitrogen; the gels so obtained were lyophilised. The material, tested by SEM, appears quite porous. FT-IR spectra show that the carboxylate band at about 1600 cm-1 is slightly altered, likely due to some interaction with the ionic hydroxyapatite structure. Thermogravimetric analysis of the composites shows a slight shift towards higher temperatures of the main signal of the gellan decomposition at 258°C; that shift increases with increasing hydroxyapatite to gellan ratio. Such behaviour may be indicative of a slight thermal stabilisation of gellan, due to interaction with hydroxyapatite. (literal)

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