title: Role of SrO on the bioactivity behavior of some ternary borate glasses and their glass ceramic derivatives.
abstract: Borate glasses containing SrO substituting both CaO and NaO were prepared and characterized for their bioactivity or bone bonding ability. Glass ceramic derivatives were prepared by thermal heat treatment process. FTIR, XRD and SEM measurements for the prepared glass and glass-ceramics before and after immersion in sodium phosphate solution for one and two weeks were carried out. The appearance of two IR peaks within the range 550-680cm(-1) after immersion in phosphate solution indicates the formation of hydroxyapatite or equivalent Sr phosphate layer. X-ray diffraction data agree with the FTIR spectral analysis. The solubility test was carried out for both glasses and glass ceramics derivatives in the same phosphate solution. The introduction of SrO increases the solubility for both glasses and glass ceramics and this is assumed to be due to the formation of Sr phosphate which is more soluble than calcium phosphate (hydroxyapatite). SEM images reveal varying changes in the surfaces of glass ceramics after immersion according to the SrO content.
authors.affiliation: Spectroscopy Dept., Physics Division, National Research Centre, Dokki, 12311 Cairo, Egypt. Electronic address: a.m_abdelghany@yahoo.com.
authors.forename: A M
authors.initials: AM
authors.lastname: Abdelghany
authors.affiliation: Glass Research Dept., National Research Centre, Dokki, Cairo, Egypt.
authors.forename: M A
authors.initials: MA
authors.lastname: Ouis
authors.affiliation: Glass Research Dept., National Research Centre, Dokki, Cairo, Egypt; Shaqra University, Faculty of Science, ElQuaieia Branch, Chemistry Dept., Saudi Arabia.
authors.forename: M A
authors.initials: MA
authors.lastname: Azooz
authors.affiliation: Glass Research Dept., National Research Centre, Dokki, Cairo, Egypt.
authors.forename: H A
authors.initials: HA
authors.lastname: ElBatal
authors.affiliation: Biomaterials Dept., National Research Centre, Dokki, Cairo, Egypt; College of Medicine, Taif University, Saudi Arabia.
authors.forename: G T
authors.initials: GT
authors.lastname: El-Bassyouni
mesh_terms: D018786:Bone Substitutes / Q000737:chemistry*; D001881:Borates / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry*; D003343:Corrosion; D017886:Durapatite / Q000737:chemistry; D005898:Glass / Q000737:chemistry*; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013324:Strontium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D018786:Bone Substitutes; D001881:Borates; D010087:Oxides; C023506:Glass ceramics; D017886:Durapatite; D013324:Strontium
keywords: Bioactivity; Borate glasses; Glass ceramics; IR; SEM; SrO; X-ray