Bioactivity modulation of Bioglass® powder by thermal treatment |
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| Authors: | Marlin Magallanes-Perdomo Sylvain Meille Jean-Marc Chenal Elodie Pacard Jérôme Chevalier |
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| Affiliation: | 1. Université de Lyon, CNRS, France;2. INSA-Lyon, MATEIS UMR5510, F-69621 Villeurbanne, France;3. Noraker, 13 Avenue Albert Einstein, 69100 Villeurbanne, France;1. Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany;2. Department of Biomedical Engineering, Florida Institute of Technology, Melbourne, FL, USA;3. Department of Materials, Imperial College London, London SW7 2AZ, UK;1. Department of Oral Biology, University of Pittsburgh, Pittsburgh, PA, USA;2. The Center for Craniofacial Regeneration, University of Pittsburgh, Pittsburgh, PA, USA;3. Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA;4. The McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA;5. Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA, USA;1. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, People’s Republic of China;2. Department of Orthopaedics, Shanghai Sixth People’s Hospital, Shanghai Jiaotong University, 600 Yishan Road, Shanghai 200233, People’s Republic of China;3. School of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, People’s Republic of China |
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| Abstract: | A discussion of the effects of Bioglass® powder crystallisation on the in vitro bioactivity in simulated body fluid (SBF) is presented.Starting from Bioglass® powder, different glass–ceramics were obtained by thermal treatments between 580 °C and 800 °C, with variable crystallisation content (from 10 to 92 wt%). All samples (glass and glass–ceramics) showed apatite formation at their surface when immersed in SBF. In case of the glass and the samples with lowest crystallinity, the first step of apatite formation involved a homogenous dissolution followed by an amorphous calcium phosphate (CaP) layer precipitation. For the samples with a high crystallisation content, heterogeneous dissolution occurred. For the first time, the Stevels number of the amorphous phase is used to explain the possible dissolution of the crystalline phase present in materials with a similar chemical composition of the Bioglass®. All samples presented at 21 days of immersion in SBF B-type hydroxycarbonate apatite crystals. |
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