Porous calcium phosphate glass microspheres for orthobiologic applications

Hossain, Kazi Md Zakir and Patel, Uresha and Kennedy, Andrew R. and Macri-Pellizzeri, Laura and Sottile, Virginie and Grant, David M. and Scammell, Brigitte E. and Ahmed, Ifty (2018) Porous calcium phosphate glass microspheres for orthobiologic applications. Acta Biomaterialia, 72 . pp. 396-406. ISSN 1878-7568

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Abstract

Orthobiologics is a rapidly advancing field utilising cell-based therapies and biomaterials to enable the body to repair and regenerate musculoskeletal tissues. This paper reports on a cost-effective flame spheroidisation process for production of novel porous glass microspheres from calcium phosphate based glasses to encapsulate and deliver stem cells. Careful selection of the glass and pore forming agent, along with a manufacturing method with the required processing window enabled the production of highly porous glass microspheres via a single-stage manufacturing process. The morphological and physical characterisation revealed porous microspheres with tailored surface and interconnected porosity (up to 76±5%) with average pore size of 55±8 µm and surface areas ranging from 0.34 to 0.9 m2g-1. Furthermore, simple alteration of the processing parameters produced microspheres with alternate unique morphologies, such as with solid cores and surface porosity only. The tuneable porosity enabled control over their surface area, degradation profiles and hence ion release rates. Furthermore, biocompatibility of the microspheres was assessed using human mesenchymal stem cells (hMSCs) via direct cell culture experiments and analysis confirmed that they had migrated to within the centre of the microspheres. The novel microspheres developed have huge potential for tissue engineering and regenerative medicine applications.

Item Type: Article
RIS ID: https://nottingham-repository.worktribe.com/output/935824
Keywords: Calcium phosphate glass; Porous microspheres; Stem cells
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Mechanical, Materials and Manufacturing Engineering
University of Nottingham, UK > Faculty of Medicine and Health Sciences > School of Medicine > Division of Cancer and Stem Cells
University of Nottingham, UK > Faculty of Medicine and Health Sciences > School of Medicine > Division of Rheumatology, Orthopaedics and Dermatology
Identification Number: https://doi.org/10.1016/j.actbio.2018.03.040
Depositing User: Hossain, Zakir
Date Deposited: 11 May 2018 07:45
Last Modified: 04 May 2020 19:39
URI: http://eprints.nottingham.ac.uk/id/eprint/51713

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