Interactions of Hydroxyapatite Surfaces: Conditioning Films of Human Whole Saliva

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Interactions of Hydroxyapatite Surfaces: Conditioning Films of Human Whole Saliva

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Publication Article, peer reviewed scientific
Title Interactions of Hydroxyapatite Surfaces: Conditioning Films of Human Whole Saliva
Author(s) Cardenas, Marité ; Valle-Delgado, Juan José ; Hamit, Jildiz ; Rutland, Mark ; Arnebrant, Thomas
Date 2008
English abstract
Hydroxyapatite is a very interesting material given that it is the main component in tooth enamel and because of its uses in bone implant applications. Therefore, not only the characterization of its surface is of high relevance but also designing reliable methods to study the interfacial properties of films adsorbed onto it. In this paper we apply the colloidal probe atomic force microscopy method to investigate the surface properties of commercially available hydroxyapatite surfaces (both microscopic particles and macroscopic discs) in terms of interfacial and frictional forces. In this way, we find that hydroxyapatite surfaces at physiological relevant conditions are slightly negatively charged. The surfaces were then exposed to human whole saliva, and the surface properties were re-evaluated. A thick film was formed that was very resistant to mechanical stress. The frictional measurements demonstrated that the film was indeed highly lubricating, supporting the argument that this system may prove to be a relevant model for evaluating dental and implant systems.
DOI http://dx.doi.org/10.1021/la800402s (link to publisher's fulltext)
Publisher American Chemical Society
Host/Issue Langmuir
Volume 24 (14)
Pages 7262-7268
Language eng (iso)
Subject(s) Sciences
Research Subject Categories::NATURAL SCIENCES
Research Subject Categories::TECHNOLOGY
Handle http://hdl.handle.net/2043/6899 (link to this page)

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