𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Surface characteristics, mechanical properties, and cytocompatibility of oxygen plasma-implanted porous nickel titanium shape memory alloy

✍ Scribed by S.L. Wu; Paul K. Chu; X.M. Liu; C.Y. Chung; J.P.Y. Ho; C.L. Chu; S.C. Tjong; K.W.K. Yeung; W.W. Lu; K.M.C. Cheung; K.D.K. Luk

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
661 KB
Volume
79A
Category
Article
ISSN
1549-3296

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Good surface properties and biocompatibility are crucial to porous NiTi shape memory alloys (SMA) used in medical implants, as possible nickel release from porous NiTi may cause deleterious effects in the human body. In this work, oxygen plasma immersion ion implantation (O‐PIII) was used to reduce the amount of nickel leached from porous NiTi alloys with a porosity of 42% prepared by capsule‐free hot isostatic pressing. The mechanical properties, surface properties, and biocompatibility were studied by compression tests, X‐ray photoelectron spectroscopy (XPS), and cell culturing. The O‐PIII porous NiTi SMAs have good mechanical properties and excellent superelasticity, and the amount of nickel leached from the O‐PIII porous NiTi is much less than that from the untreated samples. XPS results indicate that a nickel‐depleted surface layer predominantly composed of TiO~2~ is produced by O‐PIII and acts as a barrier against out‐diffusion of nickel. The cell culturing tests reveal that both the O‐PIII and untreated porous NiTi alloys have good biocompatibility. © 2006 Wiley Periodicals, Inc. J Biomed Mater Res, 2006

📜 SIMILAR VOLUMES

Corrosion resistance, surface mechanical
Corrosion resistance, surface mechanical properties, and cytocompatibility of plasma immersion ion implantation–treated nickel-titanium shape memory alloys
✍ K. W. K. Yeung; R. W. Y. Poon; X. Y. Liu; J. P. Y. Ho; C. Y. Chung; P. K. Chu; W 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 212 KB

## Abstract Nickel‐titanium shape memory alloys are promising materials in orthopedic applications because of their unique properties. However, for prolonged use in a human body, deterioration of the corrosion resistance of the materials becomes a critical issue because of the increasing possibilit

Investigation of nickel suppression and
Investigation of nickel suppression and cytocompatibility of surface-treated nickel-titanium shape memory alloys by using plasma immersion ion implantation
✍ K. W. K. Yeung; R. W. Y. Poon; X. Y. Liu; J. P. Y. Ho; C. Y. Chung; P. K. Chu; W 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 476 KB

## Abstract Nickel‐titanium (NiTi) shape memory alloys are increasingly being used in orthopedic applications. However, there is a concern that Ni is harmful to the human body. We have recently investigated the use of nitrogen, or oxygen plasma immersion ion implantation to mitigate this deleteriou

Surface characteristics, biocompatibilit
Surface characteristics, biocompatibility, and mechanical properties of nickel-titanium plasma-implanted with nitrogen at different implantation voltages
✍ X.M. Liu; S.L. Wu; Y.L. Chan; Paul K. Chu; C.Y. Chung; C.L. Chu; K.W.K. Yeung; W 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 927 KB

## Abstract NiTi shape memory alloy is one of the promising orthopedic materials due to the unique shape memory effect and superelasticity. However, the large amount of Ni in the alloy may cause allergic reactions and toxic effects thereby limiting its applications. In this work, the surface of NiT

Nickel release behavior and surface char
Nickel release behavior and surface characteristics of porous NiTi shape memory alloy modified by different chemical processes
✍ Shuilin Wu; Xiangmei Liu; Y. L. Chan; Paul K. Chu; C. Y. Chung; Chenglin Chu; Ke 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 542 KB

## Abstract As a non‐line‐of‐sight surface modification technique, chemical treatment is an effective method to treat porous NiTi with complex surface morphologies and large exposed areas due to its liquidity and low temperature. In the work described here, three different chemical processes are us