ABBA Lab

Advanced Biomaterials for Biomedical Applications Lab

Journal

Accelerated biodegradation of iron-based implants via tantalum-implanted surface nanostructures
Year
2022
Author
Min-Kyu Lee, Hyun Lee, Cheonil Park, In-Gu Kang, Jinyoung Kim, Hyoun-Ee Kim, Hyun-Do Jung*, Tae-Sik Jang
Publication date
2022/3/1
Journal
Bioactive Materials
Vol
9
Page
239-250
File
1-s2.0-S2452199X21003248-main 1.pdf (9.5M) 20회 다운로드 DATE : 2021-11-07 07:46:56
In recent years, pure iron (Fe) has attracted significant attention as a promising biodegradable orthopedic implant material due to its excellent mechanical and biological properties. However, in physiological conditions, Fe has an extremely slow degradation rate with localized and irregular degradation, which is problematic for practical applications. In this study, we developed a novel combination of a nanostructured surface topography and galvanic reaction to achieve uniform and accelerated degradation of an Fe implant. The target-ion induced plasma sputtering (TIPS) technique was applied on the Fe implant to introduce biologically compatible and electrochemically noble tantalum (Ta) onto its surface and develop surface nano-galvanic couples. Electrochemical tests revealed that the uniformly distributed nano-galvanic corrosion cells of the TIPS-treated sample (nano Ta–Fe) led to relatively uniform and …