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.J., Allen W.C., Greenlee T.K., Bonding mechanisms at the interface of ceramic prosthetic materials, J. Biomed. Mater. Res. 1971, 5, 117–141 [6] Hench L.L., Polak J.M., Third-generation biomedicalmaterials. Science 2002, 295, 1014–1017 [7] Hench L.L., Xynos I.D., Polak J.M., Bioactive glasses for in situ tissue regeneration, J. Biomater. Sci. Polym. Ed. 2004, 15, 543–562 [8] Gorustovich A.A., Roether J.A., Boccaccini A.R., Effect of bioactive glasses on angiogenesis: a review of in vitro and in vivo evidences, Tissue Eng. Part B Rev. 2010, 16, 199–207 [9] Jones J

., Waite R.D., Barry M., McKay I.J., et al., ’Smart’ acid-degradable zinc-releasing silicate glasses, Mater. Lett. 2014, 126, 278–280 [6] Fredholm Y.C., Karpukhina N., Law R.V., Hill R.G., Strontiumcontaining bioactive glasses: Glass structure and physical properties, J. Non-Cryst. Solids. 2010, 356, 2546–2551 [7] Gentleman E., Fredholm Y.C., Jell G., Lotfibakhshaiesh N., O’Donnell M.D., Hill R.G., et al., The effects of strontiumsubstituted bioactive glasses on osteoblasts and osteoclasts in vitro, Biomaterials 2010, 31, 3949–3956 [8] Al-Noaman A., Rawlinson S

bioactive glasses and glass-ceramics, Biomaterials 2011, 32, 2757–2774. [14] Salinas A.J., Vallet-Regí M., Surface Tailoring of Inorganic Materials for Biomedical Applications, Ed. Raimondi L., Bianchi C., and Verné E., Bentham Science Publishers (2012), ISBN: 978-1- 60805-462-6, [15] Vallet-Regi M., Nanostructured Mesoporous Silica Matrices in Nanomedicine, J. Intern. Med. 2010, 267, 22–43. [16] Izquierdo-Barba I., Salinas A.J., Vallet-Regí M., Bioactive Glasses: From Macro to Nano, International Journal of Applied Glass Science 2013, 1–13. [17] Vallet-Regí M

References [1] Jones J.R., Review of bioactive glass: From Hench to hybrids, Acta Biomater, 2013, 9, 4457-4486. [2] Wallace K.E., Hill R.G., Pembroke J.T., Brown C.J., Hatton P.V., Influence of sodium oxide content on bioactive glass properties, J Mater Sci-Mater M, 1999, 10, 697-701. [3] Hoppe A., Güldal N.S., Boccaccini A.R., A review of the biological response to ionic dissolution products from bioactive glasses and glass-ceramics, Biomaterials, 2011, 32, 2757-2774. [4] Ducheyne P., Effect of bioactive glass particle size on osseous regeneration, J Biomed

References [1] Miguez-Pacheco V., Hench L.L., Boccaccini A.R., Bioactive glasses beyond bone and teeth: Emerging applications in contact with soft tissues, Acta Biomater., 2015, 13, 1-15. [2] Hench L.L., Chronology of Bioactive Glass Development and Clinical Applications, New J. Glas. Ceram., 2013, 03, 67-73. [3] Jones J.R., Ehrenfried L.M., Hench L.L., Optimising bioactive glass scaffolds for bone tissue engineering, Biomaterials, 2006, 27, 964-973. [4] Fu Q., Saiz E., Rahaman M.N., Tomsia A.P., Bioactive glass scaffolds for bone tissue engineering: state of the

apatite formation of (R) 45S5, Mater. Lett., 143, 2015, 279-282. [15] A. Hoppe, N.S. Güldal, A.R. Boccaccini, A review of the biological response to ionic dissolution products from bioactive glasses and glass-ceramics, Biomaterials, 32, 2011, 2757-2774. [16] D.S. Brauer, Bioactive Glasses-Structure and Properties, Angew. Chem. Int. Ed., 2015, 2-24. [17] D.S. Brauer, E. Gentleman, D.F. Farrar, M.M. Stevens, R.G. Hill, Benefits and drawbacks of zinc in glass ionomer bone cements, Biomedical Materials, 6, 2011. [18] M. Darling, R. Hill, Novel polyalkenoate (glass

, Esther M. Valliant, Kathryn Goetschius, Richard K. Brow, Delbert E. Day, Alexander Hoppe, Aldo R. Boccaccini, Ill Yong Kim, Chikara Ohtsuki, Tadashi Kokubo, Akiyoshi Osaka, Maria Vallet-Regi, Daniel Arcos, Leandro Fraile, Antonio J. Salinas, Alexandra V. Teixeira, Yuliya Vueva, Rui M. Almeida, Marta Miola, Chiara Vitale-Brovarone, Enrica Verne, Wolfram Holand, and Julian R. Jones. A unified in vitro evaluation for apatite-forming ability of bioactive glasses and their variants. Journal of materials science. Materials in medicine, 26(2):115, 2015. [13] Di Zhang, Erik

Abstract

Nowadays bioactive glasses represent one of the most successful bioceramics used for bone tissue restorations. In this work, three types of silica sands (White, Yellow and Gray Sands) and calcite from Cuban natural deposits were employed to synthesize glasses from the system SiO2–CaO–Na2O. The ions released from glasses were evaluated through in vitro tests in Tris-HCl and in simulated body fluids. All sands had purity around 99.2% of SiO2 and contained traces (ppm) of Zr, Cr, Ba, Ce and Sr ions, while calcite raw material had traces of Sr, Cr, Zr, Ce and Zn. All glasses induced a pH change in Tris-HCl from 7.4 to 9 after 24 h; they had similar ion-release behavior in the in vitro solutions tested and showed a significant bioactive performance after 5 h. This work illustrates the potentialities of the use of natural resources to develop medical products when recognized trademark materials are not available.

properties, by taking advantage of the inherent high surface area/volume ratio of nanoparticles [11]. This paper gives an overview of the application of inorganic nanoparticles in biomedical fields, with a focus on hydroxyapatite and bioactive glass nanoparticles for bone tissue engineering. First, a brief overview of the chemical structure and some common methods used to produce synthetic hydroxyapatite and bioactive glasses has been presented (in their respective sections). The main body of the paper covers the physical and biological properties of these biomaterials, as

References [1] Nicolini V., Varini E., Malavasi G. et al., The effect of composition on structural, thermal, redox and bioactive properties of Ce-containing glasses, Mater. Des., 2016, 97, 73-85. [2] Leonelli C., Lusvardi G., Malavasi G. et al., Synthesis and characterization of cerium-doped glasses and in vitro evaluation of bioactivity, J. Non. Cryst. Solids, 2003, 316, 198-216. [3] Salinas A.J., Shruti S., Malavasi G. et al., Substitutions of cerium, gallium and zinc in ordered mesoporous bioactive glasses, Acta Biomater., 2011, 7, 3452-3458. [4] Borges R