Production of hydroxyapatite layers on the plasma electrolytically oxidized surface of titanium alloys

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116 Scopus citations

Abstract

Hydroxyapatite (HA) is a bioactive material that is widely used for improving the osseointegration of titanium dental implants. Titanium can be coated with HA by various methods, such as chemical vapor deposition (CVD), thermal spray, or plasma spray. HA coatings can also be grown on titanium surfaces by hydrothermal, chemical, and electrochemical methods. Plasma electrolytic oxidation (PEO), or microarc oxidation (MAO), is an electrochemical method that enables the production of a thick porous oxide layer on the surface of a titanium implant. If the electrolyte in which PEO is performed contains calcium and phosphate ions, the oxide layer produced may contain hydroxyapatite. The HA content can then be increased by subsequent hydrothermal treatment. The HA thus produced on titanium surfaces has attractive properties, such as a high porosity, a controllable thickness, and a considerable density, which favor its use in dental and bone surgery. This review summarizes the state of the art and possible further development of PEO for the production of HA on Ti implants.

Original languageEnglish
Pages (from-to)527-532
Number of pages6
JournalMaterials Science and Engineering C
Volume43
DOIs
StatePublished - 1 Oct 2014

Keywords

  • Bone and dental surgery
  • Hydroxyapatite
  • Plasma electrolytic oxidation
  • Titanium alloys

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