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Strontium doped calcium phosphate coatings on poly(etheretherketone) (PEEK) by pulsed electron deposition

Strontium doped calcium phosphate coatings on poly(etheretherketone) (PEEK) by pulsed electron deposition

Authors :
Matteo Berni
Lorenzo Degli Esposti
Anna Tampieri
Michele Bianchi
Sander C.G. Leeuwenburgh
Fabiola Liscio
Alessandro Gambardella
Alberto Ballardini
Michele Iafisco
Simone Sprio
Source :
Surface & Coatings Technology, 319, 191-199, Surface & coatings technology 319 (2017): 191–199. doi:10.1016/j.surfcoat.2017.04.012, info:cnr-pdr/source/autori:Bianchi, Michele; Degli Esposti, Lorenzo; Ballardini, Alberto; Liscio, Fabiola; Berni, Matteo; Gambardella, Alessandro; Leeuwenburgh, Sander C. G.; Sprio, Simone; Tampieri, Anna; Iafisco, Michele/titolo:Strontium doped calcium phosphate coatings on poly(etheretherketone) (PEEK) by pulsed electron deposition/doi:10.1016%2Fj.surfcoat.2017.04.012/rivista:Surface & coatings technology/anno:2017/pagina_da:191/pagina_a:199/intervallo_pagine:191–199/volume:319, Surface & Coatings Technology, 319, pp. 191-199
Publication Year :
2017

Abstract

Herein the preparation of Sr2+-doped calcium phosphate (CaP) coatings on poly(etheretherketone) (PEEK) substrates by pulsed electron deposition (PED) was investigated. Hydroxyapatites (HA) substituted with tailored amounts of Sr2+ up to 9 wt% were synthesized to generate the deposition targets. Dense and uniform amorphous CaP films having Sr/Ca molar ratios close to that of targets were achieved. The roughness and the wettability of the bare PEEK were significantly enhanced after coating deposition. The presence of Sr2+ led to a slight increase of the particles size while it did not mainly affect the RMS of the coatings that consisted of nanostructured aggregates of globular shape. After a mild annealing treatment at 130 degrees C for 6 h, the amorphous coatings transformed into nanocrystalline HA films incorporating sr(2+) having Sr/Ca molar ratios close to those of the as-deposited films. The annealing did not affect the topography and the roughness of the coatings, while improved the hardness of the films un-doped and doped at low-extent. This study shows that PED is feasible technique to coat PEEK implants with CaP films with control over the Sr/Ca ratio, which could improve bone fixation and in vivo stability especially under osteoporotic conditions thanks to the anabolic effect of Sr2+. (C) 2017 Elsevier B.V. All rights reserved.

Details

Language :
English
ISSN :
02578972
Database :
OpenAIRE
Journal :
Surface & Coatings Technology, 319, 191-199, Surface & coatings technology 319 (2017): 191–199. doi:10.1016/j.surfcoat.2017.04.012, info:cnr-pdr/source/autori:Bianchi, Michele; Degli Esposti, Lorenzo; Ballardini, Alberto; Liscio, Fabiola; Berni, Matteo; Gambardella, Alessandro; Leeuwenburgh, Sander C. G.; Sprio, Simone; Tampieri, Anna; Iafisco, Michele/titolo:Strontium doped calcium phosphate coatings on poly(etheretherketone) (PEEK) by pulsed electron deposition/doi:10.1016%2Fj.surfcoat.2017.04.012/rivista:Surface & coatings technology/anno:2017/pagina_da:191/pagina_a:199/intervallo_pagine:191–199/volume:319, Surface & Coatings Technology, 319, pp. 191-199
Accession number :
edsair.doi.dedup.....7ee5262916f8cb3158a6196d0ef87e90
Full Text :
https://doi.org/10.1016/j.surfcoat.2017.04.012