Accelerated calcium phosphate formation on titanium utilizing galvanic current between titanium and gold in hanks' solution

Yusuke Tsutsumi, Equo Kobayashi, Masakimi Ogo, Suyalatu, Satoshi Migita, Hisashi Doi, Naoyuki Nomura, Kazuhiko Noda, Takao Hanawa

Research output: Contribution to journalArticle

Abstract

To enhance hard-tissue compatibility of Ti, galvanic current between titanium (Ti) and gold (Au) may be available. Prior to the design of medical devices with the capability to generate a galvanic current, it is necessary to understand the control mechanism. In this study, we first measured galvanic current between Ti and Au with various surface areas in Hanks' solution. The galvanic current increased immediately after connection of two electrodes, followed by an abrupt decrease and a steady state. The galvanic current varied with the combinations of Ti and Au areas. We, thereafter, evaluated the formation of calcium phosphate on Ti under a condition of applying simulated galvanic current. Surface characterization was revealed in which the calcium phosphate formation was enhanced accompanied by growth of Ti oxide layer under the galvanic current application. A similar result was observed on Ti with patterned Au coating without outer electric power. Therefore, galvanic current is useful to enhance hard-tissue compatibility, and this technique has potential for applications to metallic biomaterials.

Original languageEnglish
Pages (from-to)149-155
Number of pages7
JournalMaterials Transactions
Volume54
Issue number2
DOIs
Publication statusPublished - 2013 Feb 4

Keywords

  • Calcium phosphate
  • Galvanic current
  • Hard-tissue compatibility
  • Titanium

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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