Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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A Study on Oxidation Behavior and Cytotoxicity Test of Ti-10Ta-10Nb Alloy

생체용 타이타늄 합금의 산화거동 및 세포독성에 관한 연구

  • Cho, Hong-Kyu (Dept. of Dental Laboratory Technology, Kwangju Health College) ;
  • Lee, Doh-Jae (Dept. of Metallurgical Engineering, Chonnam National University) ;
  • Lee, Kwang-Min (Dept. of Metallurgical Engineering, Chonnam National University) ;
  • Lee, Kyung-Ku (Dept. of Metallurgical Engineering, Chonnam National University)
  • 조홍규 (광주보건대학 치기공과) ;
  • 이도재 (전남대학교 공과대학 신소재공학부) ;
  • 이광민 (전남대학교 공과대학 신소재공학부) ;
  • 이경구 (전남대학교 공과대학 신소재공학부)
  • Published : 2004.07.01
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Abstract

A new Ti-10Ta-10Nb alloy has designed and examined some possibility of forming more passive oxide film by oxidation treatment which is closely related to corrosion resistance and biocompatibility. Ti-6Al-4V and Ti-10Ta-10Nb alloys were prepared by consumable vacuum arc melting and homogenized at 1050$^{\circ}C$ for 24hours. Alloy specimens were oxidized at the temperature range of 400 to 750$^{\circ}C$ for 30minutes, and the oxide films on Ti alloys were analysed by optical microscope, SEM, XPS and TGA. Cytotoxicity test was performed in MTT assay treated L929 fibroblast cell culture by indirect method. It is found out that the oxide film on Ti-10Ta-10Nb alloy is denser and thinner compared to Ti-6Al-4V alloy. The weight gain during the oxidation was increased rapidly at the temperature above 650$^{\circ}C$ for Ti-6Al-4V alloy and above 700$^{\circ}C$ for Ti-10Ta-10Nb alloy respectively. It was analysed that the passive film of the Ti alloys consisted of TiO2 through X-ray photoelectron spectroscopy (XPS) analysis. It is found out by cytotoxicity test that moderate oxidation treatment lowers cell toxicity, and Ti-10Ta-10Nb alloy showed better result compared to Ti-6Al-4V alloy.

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