Generation of bio-compatible titanium alloy surfaces by laser-induced wet treatment

Kazutoshi Katahira, Atsushi Ezura, Koki Ohkawa, Jun Komotori, Hitoshi Ohmori

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A laser-induced surface treatment in wet conditions was developed for improving the biocompatibility of titanium alloys. Disk-shaped titanium samples were soaked in a calcium nitrate solution and subsequently irradiated by a Yb fiber pulse laser beam, creating a modified surface layer containing calcium and oxygen elements. The modified layer exhibited optimal properties for treatment at a defocus distance of -1. mm and for a calcium nitrate concentration of 10%. The apatite-forming ability of the modified surface was affirmed in bioactivity tests performed in the simulated body fluid. It was shown that a Ca-rich layer was stably generated by the modified treatment process. The generated Ca-rich layer demonstrated superior biocompatibility, suggesting increased hydroxyapatite content.

Original languageEnglish
JournalCIRP Annals - Manufacturing Technology
DOIs
Publication statusAccepted/In press - 2016

Fingerprint

Titanium alloys
Calcium
Biocompatibility
Lasers
Nitrates
Body fluids
Apatite
Bioactivity
Hydroxyapatite
Chemical elements
Laser beams
Surface treatment
Laser pulses
Titanium
Oxygen
Fibers

Keywords

  • Bio-compatible surface
  • Laser
  • Titanium

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

Generation of bio-compatible titanium alloy surfaces by laser-induced wet treatment. / Katahira, Kazutoshi; Ezura, Atsushi; Ohkawa, Koki; Komotori, Jun; Ohmori, Hitoshi.

In: CIRP Annals - Manufacturing Technology, 2016.

Research output: Contribution to journalArticle

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AB - A laser-induced surface treatment in wet conditions was developed for improving the biocompatibility of titanium alloys. Disk-shaped titanium samples were soaked in a calcium nitrate solution and subsequently irradiated by a Yb fiber pulse laser beam, creating a modified surface layer containing calcium and oxygen elements. The modified layer exhibited optimal properties for treatment at a defocus distance of -1. mm and for a calcium nitrate concentration of 10%. The apatite-forming ability of the modified surface was affirmed in bioactivity tests performed in the simulated body fluid. It was shown that a Ca-rich layer was stably generated by the modified treatment process. The generated Ca-rich layer demonstrated superior biocompatibility, suggesting increased hydroxyapatite content.

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