Carbon plasma immersion ion implantation of nickel–titanium shape memory alloys

Nickel–titanium (NiTi) shape memory alloys possess super-elasticity in addition to the well-known shape memory effect and are potentially suitable for orthopedic implants. However, a critical concern is the release of harmful Ni ions from the implants into the living tissues. We propose to enhance t...

Full description

Saved in:
Bibliographic Details
Published inBiomaterials Vol. 26; no. 15; pp. 2265 - 2272
Main Authors Poon, R.W.Y., Yeung, K.W.K., Liu, X.Y., Chu, P.K., Chung, C.Y., Lu, W.W., Cheung, K.M.C., Chan, D.
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier Ltd 01.05.2005
Subjects
Animals
Animals, Newborn
Biomimetic Materials - chemistry
Body Fluids - chemistry
Carbon - analysis
Carbon - chemistry
Cell Adhesion - physiology
Cell Proliferation
Cell Size
Cells, Cultured
Coated Materials, Biocompatible - chemistry
Corrosion
Corrosion resistance
Elasticity
Electrochemistry - methods
Hardness
Hot Temperature
Ions
Materials Testing
Mechanical properties
Mice
Nickel - analysis
Nickel - chemistry
NiTi shape memory alloys
Orthopedic implants
Osteoblasts
Osteoblasts - cytology
Osteoblasts - physiology
Surface Properties
Titanium - analysis
Titanium - chemistry
Corrosion resistance
Mechanical properties
Orthopedic implants
NiTi shape memory alloys
Osteoblasts
Online AccessGet full text

Cover

More Information
Summary:Nickel–titanium (NiTi) shape memory alloys possess super-elasticity in addition to the well-known shape memory effect and are potentially suitable for orthopedic implants. However, a critical concern is the release of harmful Ni ions from the implants into the living tissues. We propose to enhance the corrosion resistance and other surface and biological properties of NiTi using carbon plasma immersion ion implantation and deposition (PIII&D). Our corrosion and simulated body fluid tests indicate that either an ion-mixed amorphous carbon coating fabricated by PIII&D or direct carbon PIII can drastically improve the corrosion resistance and block the out-diffusion of Ni from the materials. Our tribological tests show that the treated surfaces are mechanically more superior and cytotoxicity tests reveal that both sets of plasma-treated samples favor adhesion and proliferation of osteoblasts.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ObjectType-Article-2
ObjectType-Feature-1
ISSN:0142-9612
1878-5905
DOI:10.1016/j.biomaterials.2004.07.056