Surface and mechanical properties of a nanostructured citrate hydroxyapatite coating on pure titanium

The presence of a biomimetic HAP coating on titanium surface, which reduces the structural stiffness, is essential to improve implants biocompatibility and osteointegration. In this study, new citrate-HAP (cHAP) coatings were produced by a simple hydrothermal method on pure titanium (Ti) surface, wi...

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Bibliographic Details
Published in:Journal of the mechanical behavior of biomedical materials 2020-08, Vol.108, p.103794-103794, Article 103794
Main Authors: Arrés, Mar, Salama, Mariana, Rechena, Diogo, Paradiso, Patrizia, Reis, Luis, Alves, Marta M., Botelho do Rego, Ana M., Carmezim, Maria J., Vaz, Maria Fátima, Deus, Augusto M., Santos, Catarina
Format: Article
Language:English
Subjects:
Citrate
Citric Acid
Coated Materials, Biocompatible
Durapatite
Hydrothermal method
Nanostructured hydroxyapatite
Prostheses and Implants
Pure titanium
Stress and strain distribution
Surface Properties
Titanium
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Summary:The presence of a biomimetic HAP coating on titanium surface, which reduces the structural stiffness, is essential to improve implants biocompatibility and osteointegration. In this study, new citrate-HAP (cHAP) coatings were produced by a simple hydrothermal method on pure titanium (Ti) surface, without requiring any additional pretreatment on this metal surface. The formed cHAP coatings consisting of nanorod-like hydroxyapatite particles, conferred nanoroughness and wettability able to endow improved biological responses. Indeed, the presence of citrate species in the precipitate medium seems to be responsible for controlling the morphology of the new coatings. The presence of citrate groups on the surface of cHAP coatings, identified by chemical composition analysis, due to their implication in bone metabolism can additionally bring an add-value for bone implant applications. From a mechanical point of view, the Finite Element algorithm showing that cHAP coatings tend to decrease the mechanical stress at pure Ti, further favors these new coatings applicability. Overall, the simple and expedite strategy used to developed new biomimetic coatings of citrate-HAP resulted in improved physicochemical, morphological and mechanical properties of Ti, which can endeavor improved implantable materials in bone healing surgical procedures.
ISSN:1751-6161
1878-0180
DOI:10.1016/j.jmbbm.2020.103794