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Open AccessFeature PaperArticle

Bioactive Glasses with Low Ca/P Ratio and Enhanced Bioactivity

Colorobbia España S.A, Carretera CV-160, Vilafamés 12192, Spain
Ce.Ri.Col, Centro Richerche Colorobbia, Via Pietramarina 123, Sovigliana (FI) 50053, Italy
Politecnico di Torino, Applied Science and Technology Department, Corso Duca degli Abruzzi 24, Torino 10129, Italy
Present affiliation: Università del Piemonte Orientale, Department of Health Sciences, Via Solaroli 17, Novara 28100, Italy
Author to whom correspondence should be addressed.
Academic Editor: Gigliola Lusvardi
Materials 2016, 9(4), 226;
Received: 8 February 2016 / Revised: 11 March 2016 / Accepted: 16 March 2016 / Published: 24 March 2016
(This article belongs to the Special Issue Bioactive Glasses)
Three new silica-based glass formulations with low molar Ca/P ratio (2–3) have been synthesized. The thermal properties, the crystalline phases induced by thermal treatments and the sintering ability of each glass formulation have been investigated by simultaneous differential scanning calorimetry-thermogravimetric analysis (DSC-TG), X-ray diffraction (XRD) and hot stage microscopy (HSM). The glasses exhibited a good sintering behavior, with two samples achieving shrinkage of 85%–95% prior to crystallization. The bioactivity of the glasses in simulated body fluid (SBF) has been investigated by performing XRD and Fourier transform infrared spectroscopy (FTIR) on the samples prior and after immersion. The glasses with lower MgO contents were able to form a fully crystallized apatite layer after three days of immersion in simulated body fluid (SBF), while for the glass exhibiting a higher MgO content in its composition, the crystallization of the Ca–P layer was achieved after seven days. The conjugation of these properties opens new insights on the synthesis of highly bioactive and mechanically strong prosthetic materials. View Full-Text
Keywords: bioactive glasses; bioactivity; Ca/P ratio; densification; sintering bioactive glasses; bioactivity; Ca/P ratio; densification; sintering
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MDPI and ACS Style

Araújo, M.; Miola, M.; Baldi, G.; Perez, J.; Verné, E. Bioactive Glasses with Low Ca/P Ratio and Enhanced Bioactivity. Materials 2016, 9, 226.

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