Sol-gel deposition of hydroxyapatite coatings on porous titanium for biomedical applications

The stress shielding and the poor osseointegration in titanium implants are still problems to be resolved. In this context, this work proposes a balanced solution. Titanium samples were fabricated, with a porosity of 100-200 µm of pore size employing space-holder technique (50 vol. % NH4HCO3, 800 MP...

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Autores: Domínguez-Trujillo, Cristina, Peón Avés, Eduardo, Chicardi Augusto, Ernesto, Pérez, H., Rodríguez-Ortiz, José Antonio, Pavón Palacio, Juan José, García-Couce, J., Galván, J.C., García-Moreno, Francisco, Torres Hernández, Yadir
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/74487
Acceso en línea:https://hdl.handle.net/11441/74487
https://doi.org/10.1016/j.surfcoat.2017.10.079
Access Level:acceso abierto
Palabra clave:Space-holder
Hydroxyapatite
Porous titanium
Sol-gel
Stress shielding
Osseointegration
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spelling Sol-gel deposition of hydroxyapatite coatings on porous titanium for biomedical applicationsDomínguez-Trujillo, CristinaPeón Avés, EduardoChicardi Augusto, ErnestoPérez, H.Rodríguez-Ortiz, José AntonioPavón Palacio, Juan JoséGarcía-Couce, J.Galván, J.C.García-Moreno, FranciscoTorres Hernández, YadirSpace-holderHydroxyapatitePorous titaniumSol-gelStress shieldingOsseointegrationThe stress shielding and the poor osseointegration in titanium implants are still problems to be resolved. In this context, this work proposes a balanced solution. Titanium samples were fabricated, with a porosity of 100-200 µm of pore size employing space-holder technique (50 vol. % NH4HCO3, 800 MPa at 1250 ºC during 2h under high vacuum conditions), obtaining a good equilibrium between stiffness and mechanical resistance. The porous titanium substrates were coated with hydroxyapatite, obtained by sol-gel technique: immersion, dried at 80ºC and heat treatment at 450ºC during 5h under vacuum conditions. Phases, surface morphology and interfacial microstructure of the transverse section were analyzed by Micro-Computed Tomography, SEM and confocal laser, as well as the infiltration capability of the coating into the metallic substrate pores. The FTIR and XRD showed the crystallinity of the phases and the chemical composition homogeneity of the coating. The size and interconnected pores obtained allow the infiltration of hydroxyapatite (HA), possible bone ingrowth and osseointegration. The scratch resistance of the coating corroborated a good adherence to the porous metallic substrate. The coated titanium samples have a biomechanical and biofunctional equilibrium, as well as a potential use in biomedical applications (partial substitution of bone tissue).Junta de Andalucía-FEDER (Spain) Project Ref. P12-TEP-1401Spanish Ministry of Economy and Competitiveness Grant No. MAT2015-71284-PElsevierIngeniería y Ciencia de los Materiales y del TransporteTEP123: Metalurgia e Ingeniería de los MaterialesJunta de AndalucíaMinisterio de Economía y Competitividad (MINECO). España2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/74487https://doi.org/10.1016/j.surfcoat.2017.10.079reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésP12-TEP-1401MAT2015-71284-Phttps://www.sciencedirect.com/science/article/pii/S0257897217311209info:eu-repo/semantics/openAccessoai:idus.us.es:11441/744872026-06-17T12:51:07Z
dc.title.none.fl_str_mv Sol-gel deposition of hydroxyapatite coatings on porous titanium for biomedical applications
title Sol-gel deposition of hydroxyapatite coatings on porous titanium for biomedical applications
spellingShingle Sol-gel deposition of hydroxyapatite coatings on porous titanium for biomedical applications
Domínguez-Trujillo, Cristina
Space-holder
Hydroxyapatite
Porous titanium
Sol-gel
Stress shielding
Osseointegration
title_short Sol-gel deposition of hydroxyapatite coatings on porous titanium for biomedical applications
title_full Sol-gel deposition of hydroxyapatite coatings on porous titanium for biomedical applications
title_fullStr Sol-gel deposition of hydroxyapatite coatings on porous titanium for biomedical applications
title_full_unstemmed Sol-gel deposition of hydroxyapatite coatings on porous titanium for biomedical applications
title_sort Sol-gel deposition of hydroxyapatite coatings on porous titanium for biomedical applications
dc.creator.none.fl_str_mv Domínguez-Trujillo, Cristina
Peón Avés, Eduardo
Chicardi Augusto, Ernesto
Pérez, H.
Rodríguez-Ortiz, José Antonio
Pavón Palacio, Juan José
García-Couce, J.
Galván, J.C.
García-Moreno, Francisco
Torres Hernández, Yadir
author Domínguez-Trujillo, Cristina
author_facet Domínguez-Trujillo, Cristina
Peón Avés, Eduardo
Chicardi Augusto, Ernesto
Pérez, H.
Rodríguez-Ortiz, José Antonio
Pavón Palacio, Juan José
García-Couce, J.
Galván, J.C.
García-Moreno, Francisco
Torres Hernández, Yadir
author_role author
author2 Peón Avés, Eduardo
Chicardi Augusto, Ernesto
Pérez, H.
Rodríguez-Ortiz, José Antonio
Pavón Palacio, Juan José
García-Couce, J.
Galván, J.C.
García-Moreno, Francisco
Torres Hernández, Yadir
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ingeniería y Ciencia de los Materiales y del Transporte
TEP123: Metalurgia e Ingeniería de los Materiales
Junta de Andalucía
Ministerio de Economía y Competitividad (MINECO). España
dc.subject.none.fl_str_mv Space-holder
Hydroxyapatite
Porous titanium
Sol-gel
Stress shielding
Osseointegration
topic Space-holder
Hydroxyapatite
Porous titanium
Sol-gel
Stress shielding
Osseointegration
description The stress shielding and the poor osseointegration in titanium implants are still problems to be resolved. In this context, this work proposes a balanced solution. Titanium samples were fabricated, with a porosity of 100-200 µm of pore size employing space-holder technique (50 vol. % NH4HCO3, 800 MPa at 1250 ºC during 2h under high vacuum conditions), obtaining a good equilibrium between stiffness and mechanical resistance. The porous titanium substrates were coated with hydroxyapatite, obtained by sol-gel technique: immersion, dried at 80ºC and heat treatment at 450ºC during 5h under vacuum conditions. Phases, surface morphology and interfacial microstructure of the transverse section were analyzed by Micro-Computed Tomography, SEM and confocal laser, as well as the infiltration capability of the coating into the metallic substrate pores. The FTIR and XRD showed the crystallinity of the phases and the chemical composition homogeneity of the coating. The size and interconnected pores obtained allow the infiltration of hydroxyapatite (HA), possible bone ingrowth and osseointegration. The scratch resistance of the coating corroborated a good adherence to the porous metallic substrate. The coated titanium samples have a biomechanical and biofunctional equilibrium, as well as a potential use in biomedical applications (partial substitution of bone tissue).
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/74487
https://doi.org/10.1016/j.surfcoat.2017.10.079
url https://hdl.handle.net/11441/74487
https://doi.org/10.1016/j.surfcoat.2017.10.079
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv P12-TEP-1401
MAT2015-71284-P
https://www.sciencedirect.com/science/article/pii/S0257897217311209
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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