Corrosion Characteristics of Cell-Covered Ternary Ti-Nb-Ta Alloy for Biomaterials

최한철; W.G. Kim; Y.M. Ko; G.H. Park; 유진우

추천

검색

자료유형: 학술저널

저자정보: 최한철 W.G. Kim Y.M. Ko G.H. Park 유진우

저널정보: 한국부식방식학회 Corrosion Science and Technology Corrosion Science and Technology 제8권 제2호

발행연도: 2009.1

수록면: 62 - 67 (6page)

이용수

📌

연구주제

📖

연구배경

🔬

연구방법

🏆

연구결과

초록· 키워드

오류제보하기

Ti and Ti-alloys have good biocompatibility, appropriate mechanical properties and excellent corrosion resistance. However, the widely used Ti-6Al-4V is found to release toxic ions (Al and V) into the body, leading to undesirable long-term effects. Ti-6Al-4V has much higher elastic modulus (100 GPa) than cortical bone (20 GPa). Therefore, titanium alloys with low elastic modulus have been developed as biomaterials to minimize stress shielding. The electrochemical behavior of surface-modified and MC3T3-E1 cell-cultured Ti-30(Nb,Ta) alloys with low elastic modulus have been investigated using various electrochemical methods. Surfaces of test samples were treated as follows: 0.3 μm polished; 25 μm, 50 μm and 125 μm sandblasted. Specimen surfaces were cultured with MC3T3-E1 cells for 2 days. Average surface roughness (Ra) and morphology of specimens were determined using a surface profilometer, OM, and FE-SEM. Corrosion behavior was investigated using a potentiostat(EG&G PARSTAT 2273), and electrochemical impedance spectroscopy was performed (10 mHz to 100 kHz) in 0.9% NaCl solution at 36.5 ± 1 ℃. The microstructures of the Ti-30(Ta,Nb) alloys had a needle-like appearance. The Ra of polished Ti-30Ta and Ti-30Nb alloys was lower than that of the sandblasted Ti alloy. Cultured cells displayed round shapes. For polished alloy samples, cells were well-cultured on all surfaces compared to sandblasted alloy samples. In sandblasted and cell-cultured Ti-30(Nb,Ta) alloy, the pitting potential decreased and passive current density increased as Ra increased. Anodic polarization curves of cell-cultured Ti alloys showed unstable behavior in the passive region compared to non-cell-cultured alloys. From impedance tests of sandblasted and cell-cultured alloys, the polarization resistance decreased as Ra increased, whereas, Ra for cell-cultured Ti alloys increased compared to non-cell-cultured Ti alloys.

#corrosion behavior #Ti-Nb-Ta alloy #dental materials #polarization resistance

참고문헌 (8)

참고문헌 신청

D. Kuroda / 2001 / / Materials Sci and Eng A 243 : 244 ~

H. C. Choe / 2005 / / Materials Science Forum : 244 ~

J. J. Park / 2007 / / Materials Science Forum : 1270 ~

K. Anselme / 2000 / / Biomaterials 21 : 1567 ~

K. Anselme / 2000 / / Biomaterials 21 : 667 ~

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!