Premium
Bioactive, nanostructured S i‐substituted hydroxyapatite coatings on titanium prepared by pulsed laser deposition
Author(s) -
Rau Julietta V.,
Cacciotti Ilaria,
Laureti Sara,
Fosca Marco,
Varvaro Gaspare,
Latini Alessandro
Publication year - 2015
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.33344
Subject(s) - materials science , titanium , chemical engineering , substrate (aquarium) , osseointegration , pulsed laser deposition , scanning electron microscope , fourier transform infrared spectroscopy , indentation hardness , nanotechnology , microstructure , composite material , metallurgy , thin film , medicine , oceanography , surgery , implant , engineering , geology
Abstract Aims : The aim of this work was to deposit silicon‐substituted hydroxyapatite (Si‐HAp) coatings on titanium for biomedical applications, since it is known that Si‐HAp is able to promote osteoblastic cells activity, resulting in the enhanced bone ingrowth. Materials and Methods : Pulsed laser deposition (PLD) method was used for coatings preparation. For depositions, Si‐HAp targets (1.4 wt % of Si), made up from nanopowders synthesized by wet method, were used. Results : Microstructural and mechanical properties of the produced coatings, as a function of substrate temperature, were investigated by scanning electron and atomic force microscopies, X‐ray diffraction, Fourier transform infrared spectroscopy, and Vickers microhardness. In the temperature range of 400–600°C, 1.4–1.5 µm thick Si‐HAp films, presenting composition similar to that of the used target, were deposited. The prepared coatings were dense, crystalline, and nanostructured, characterized by nanotopography of surface and enhanced hardness. Whereas the substrate temperature of 750°C was too high and led to the HAp decomposition. Moreover, the bioactivity of coatings was evaluated by in vitro tests in an osteoblastic/osteoclastic culture medium (α‐Modified Eagle's Medium). Conclusions : The prepared bioactive Si‐HAp coatings could be considered for applications in orthopedics and dentistry to improve the osteointegration of bone implants. © 2014 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 103B: 1621–1631, 2015.