Special Issue "Ion-Substituted Calcium Phosphates Coatings"

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: 14 December 2018

Special Issue Editors

Guest Editor
Dr. Gabriela Graziani

Laboratory of NanoBiotechnology (NaBi), Rizzoli Orthopaedic Institute, 40126 Bologna, Italy
Website | E-Mail
Interests: calcium phosphates; ion-substituted hydroxyapatite; biomimetic coatings; antibacterial coatings; bone regeneration; cultural heritage; stone conservation
Guest Editor
Dr. Enrico Sassoni

Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, 40126 Bologna, Italy
Website | E-Mail
Interests: hydroxyapatite-based consolidants and protectives for stone; self-cleaning coatings for architectural surfaces; decay mechanisms of historic building materials; historic mortars and masonry; natural fibre-based composites

Special Issue Information

Dear Colleagues,

Coatings based on hydroxyapatite and calcium phosphates have a significant relevance in several research fields, such as biomaterials, cultural heritage and water treatment, due to their characteristic properties.

Hydroxyapatite can easily accommodate foreign ions, which can either be incorporated into the lattice, thanks to its specific lattice characteristics, or be adsorbed on its surface. All these substitutions significantly alter the morphology, lattice parameters and crystallinity of hydroxyapatite, so they influence its main properties. These ion substitutions can be desired or can derive from substrate contaminations, which is an important aspect to be evaluated. Finally, this capability can be used to obtain hydroxyapatites with specific properties, such as, among others, antibacterial characteristics.

For these reasons, the aim of this Special Issue is to document current advances in the field of ion-substituted hydroxyapatites and highlight possible future perspectives regarding their use. Contributions in the form of original articles and review articles are encouraged, covering different areas of application.

In particular, the topics of interest include, but are not limited to, the following:

  • Synthesis or deposition of ion-substituted calcium phosphate coatings.
  • Nucleation of calcium phosphate coatings in the presence of substrate contaminations.
  • Antibacterial ion-substituted hydroxyapatites.
  • Ion-substituted hydroxyapatites for different applications.
  • Relevance of specific ion substitutions (e.g., magnesium, strontium, sodium) on the properties and/or the behavior of substituted hydroxyapatites.
  • Novel techniques to improve the control over ion-doping of calcium phosphates.
  • Advanced characterization techniques to investigate the properties of the coatings (composition, morphology, mechanical properties, solubility, crystallinity, ion release in different media etc…).

Dr. Gabriela Graziani
Dr. Enrico Sassoni
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (1 paper)

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Review

Open AccessFeature PaperReview A Review on Ionic Substitutions in Hydroxyapatite Thin Films: Towards Complete Biomimetism
Coatings 2018, 8(8), 269; https://doi.org/10.3390/coatings8080269
Received: 19 June 2018 / Revised: 23 July 2018 / Accepted: 28 July 2018 / Published: 31 July 2018
PDF Full-text (330 KB) | HTML Full-text | XML Full-text
Abstract
Plasma sprayed coatings composed of stoichiometric hydroxyapatite have been extensively used to improve integration of metallic implants in the host bone, as hydroxyapatite (HA) is normally regarded as similar to the mineralized phase of bone. However, these coatings exhibited several drawbacks that limited
[...] Read more.
Plasma sprayed coatings composed of stoichiometric hydroxyapatite have been extensively used to improve integration of metallic implants in the host bone, as hydroxyapatite (HA) is normally regarded as similar to the mineralized phase of bone. However, these coatings exhibited several drawbacks that limited their success. On the one hand biological apatite is a carbonated-HA, containing significant amounts of foreign ions, having low crystallinity and a small crystals size. This means that it differs from stoichiometric HA in terms of composition, stoichiometry, crystallinity degree, crystal size/morphology and, as a direct consequence, solubility, and ions release in the peri-implant environment. On the other hand, thick plasma sprayed coatings can undergo cracking and delamination and are scarcely uniform. For these reasons, research is pushing into two directions: (i) Increasing the similarity of apatite coatings to real bone, and (ii) exploring deposition by alternative plasma assisted techniques, allowing to achieve thin films, and having superior adhesion and a better control over the coating composition. In this article, we review the latest advances in the field of plasma-assisted deposition of ion-substituted hydroxyapatite thin films, highlighting the state of the art, the limitations, potentialities, open challenges, and the future scenarios for their application. Full article
(This article belongs to the Special Issue Ion-Substituted Calcium Phosphates Coatings)
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