A novel chlorhexidine-hexametaphosphate coating for titanium with antibiofilm efficacy and stem cell cytocompatibility

Garner, S. J., Dalby, M. J. , Nobbs, A. H. and Barbour, M. E. (2021) A novel chlorhexidine-hexametaphosphate coating for titanium with antibiofilm efficacy and stem cell cytocompatibility. Journal of Materials Science: Materials in Medicine, 32(12), 139. (doi: 10.1007/s10856-021-06616-5)

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Dental implants are an increasingly popular way to replace missing teeth. Whilst implant survival rates are high, a small number fail soon after placement, with various factors, including bacterial contamination, capable of disrupting osseointegration. This work describes the development of chlorhexidine-hexametaphosphate coatings for titanium that hydrolyse to release the antiseptic agent chlorhexidine. The aim was to develop a coating for titanium that released sufficient chlorhexidine to prevent biofilm formation, whilst simultaneously maintaining cytocompatibility with cells involved in osseointegration. The coatings were characterised with respect to physical properties, after which antibiofilm efficacy was investigated using a multispecies biofilm model, and cytocompatibility determined using human mesenchymal stem cells. The coatings exhibited similar physicochemical properties to some implant surfaces in clinical use, and significantly reduced formation of multispecies biofilm biomass up to 72 h. One coating had superior cytocompatibility, with mesenchymal stem cells able to perform normal functions and commence osteoblastic differentiation, although at a slower rate than those grown on uncoated titanium. With further refinement, these coatings may have application in the prevention of bacterial contamination of dental implants at the time of surgery. This could aid a reduction in rates of early implant failure.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Dalby, Professor Matthew
Authors: Garner, S. J., Dalby, M. J., Nobbs, A. H., and Barbour, M. E.
College/School:College of Medical Veterinary and Life Sciences > School of Molecular Biosciences
Journal Name:Journal of Materials Science: Materials in Medicine
ISSN (Online):1573-4838
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in Journal of Materials Science: Materials in Medicine 32(12):139
Publisher Policy:Reproduced under a Creative Commons licence

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