Apatite coatings on chemically modified titanium using a new accelerated biomimetic route

• Published in: Materials letters Vol. 280; p. 128576
• Main Authors: Morejón-Alonso, Loreley, Bussulo, Mauricio A., Debone, Rodolfo, González-Martínez, Eduardo, González, Jesús E.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.2020; Elsevier BV
• Subjects: Apatite; Biomimetic; Biomimetics; Calcification; Heat treatment; Hydroxyapatite; Materials science; Morphology; Protective coatings; Sodium titanate; Supersaturated calcification solutions; Surgical implants; Titanium; Titanium; Hydroxyapatite; Biomimetic; Supersaturated calcification solutions
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2020.128576

[Display omitted] •It is possible to deposit HA coatings on titanium within 2 h using SBFx7 solutions.•Alkaline pre-treatment (without further heating) induces nanosized-HA precipitation.•Activation by acid etching and heat needs more than 4 h to obtain a dense coating.•Proposed methodology reduces by far deposition times of traditional biomimetic route. To improve the osseointegration and biological performance of biomedical titanium, hydroxyapatite (HA) was coated onto chemically modified titanium (Ti) using a novel and fast biomimetic route which incorporated supersaturated calcification solutions (SCS). As a result, it is possible to obtain HA coatings on both acid and base chemically-modified titanium surfaces within 2 h using SCS. After coating, acid etched and heat treated Ti exhibited a fine and homogenous coating of hydroxyapatite crystals that did not change morphology after 4 h. Alkaline-modified Ti showed a denser and thicker nano-sized hydroxyapatite layer (particle size about 100 nm) at 2 h due to the presence of hydrogen sodium titanate. Therefore, no heat treatment was necessary to induce HA precipitation.