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Conference Paper: Suppression of nickel release in nickeltitanium alloys by plasma immersion ion implantation surface treatment: towards a new generation of "smart" orthopaedic implants
Title | Suppression of nickel release in nickeltitanium alloys by plasma immersion ion implantation surface treatment: towards a new generation of "smart" orthopaedic implants |
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Authors | |
Issue Date | 2006 |
Publisher | IEEE. The Journal's website is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000568 |
Citation | The 33rd IEEE International Conference on Plasma Science (ICOPS 2006), Traverse City, MI., 4-8 June 2006. In Conference Proceedings, 2006, p. 434 How to Cite? |
Abstract | Summary form only given. Nickel-titanium shape memory alloys (NiTi) are potentially very useful in spinal deformity correction due to their super elastic properties and their ability to change shape with temperature. However, release of toxic nickel particulate debris remains a major concern. We have developed a novel method of altering the surface of the material to reduce nickel release by using plasma immersion ion implantation (PIII). This study compares the corrosion resistance and mechanical properties of PIII treated samples with untreated NiTi. NiTi discs containing 50.8% Ni were implanted with nitrogen using PIII technique. Their elemental depth profile, surface chemical composition, surface hardness and corrosion resistance were compared with untreated NiTi. The amount of Ni released into simulated body fluids after the accelerated corrosion tests were determined. The biocompatibility was assessed by culturing mouse osteoblasts expressing an enhanced green fluorescent protein on the surface of these materials. After PIII treatment, a layer of titanium nitride formed on the surface. Compared to untreated NiTi, the corrosion resistance is better by five times, and the surface hardness and elastic modulus are better by a factor of 2. The concentration of Ni in the simulated body fluid for the untreated sample was 30 ppm compared to undetectable levels in the PIII treated sample. There was no difference in the ability of cells to grow on either surface. PIII results in enhanced corrosion and wear resistance, and negligible Ni release. This technique will allow NiTi alloys to be safely implanted in the human body. A new generation of "smart" orthopaedic implants will likely result. |
Persistent Identifier | http://hdl.handle.net/10722/45681 |
ISBN | |
ISSN | 2023 SCImago Journal Rankings: 0.110 |
DC Field | Value | Language |
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dc.contributor.author | Yeung, KWK | en_HK |
dc.contributor.author | Chan, YL | en_HK |
dc.contributor.author | Chan, SCW | en_HK |
dc.contributor.author | Liu, XY | en_HK |
dc.contributor.author | Chung, CY | en_HK |
dc.contributor.author | Chu, PK | en_HK |
dc.contributor.author | Lu, WW | en_HK |
dc.contributor.author | Luk, KDK | en_HK |
dc.contributor.author | Chan, D | en_HK |
dc.contributor.author | Cheung, KMC | en_HK |
dc.date.accessioned | 2007-10-30T06:32:26Z | - |
dc.date.available | 2007-10-30T06:32:26Z | - |
dc.date.issued | 2006 | en_HK |
dc.identifier.citation | The 33rd IEEE International Conference on Plasma Science (ICOPS 2006), Traverse City, MI., 4-8 June 2006. In Conference Proceedings, 2006, p. 434 | en_HK |
dc.identifier.isbn | 1-4244-0125-9 | - |
dc.identifier.issn | 0730-9244 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/45681 | - |
dc.description.abstract | Summary form only given. Nickel-titanium shape memory alloys (NiTi) are potentially very useful in spinal deformity correction due to their super elastic properties and their ability to change shape with temperature. However, release of toxic nickel particulate debris remains a major concern. We have developed a novel method of altering the surface of the material to reduce nickel release by using plasma immersion ion implantation (PIII). This study compares the corrosion resistance and mechanical properties of PIII treated samples with untreated NiTi. NiTi discs containing 50.8% Ni were implanted with nitrogen using PIII technique. Their elemental depth profile, surface chemical composition, surface hardness and corrosion resistance were compared with untreated NiTi. The amount of Ni released into simulated body fluids after the accelerated corrosion tests were determined. The biocompatibility was assessed by culturing mouse osteoblasts expressing an enhanced green fluorescent protein on the surface of these materials. After PIII treatment, a layer of titanium nitride formed on the surface. Compared to untreated NiTi, the corrosion resistance is better by five times, and the surface hardness and elastic modulus are better by a factor of 2. The concentration of Ni in the simulated body fluid for the untreated sample was 30 ppm compared to undetectable levels in the PIII treated sample. There was no difference in the ability of cells to grow on either surface. PIII results in enhanced corrosion and wear resistance, and negligible Ni release. This technique will allow NiTi alloys to be safely implanted in the human body. A new generation of "smart" orthopaedic implants will likely result. | - |
dc.format.extent | 134158 bytes | - |
dc.format.extent | 2166303 bytes | - |
dc.format.extent | 2345 bytes | - |
dc.format.extent | 4339 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.format.mimetype | application/pdf | - |
dc.format.mimetype | text/plain | - |
dc.format.mimetype | text/plain | - |
dc.language | eng | en_HK |
dc.publisher | IEEE. The Journal's website is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000568 | en_HK |
dc.relation.ispartof | IEEE Conference Record - Abstracts | - |
dc.rights | ©2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. | - |
dc.title | Suppression of nickel release in nickeltitanium alloys by plasma immersion ion implantation surface treatment: towards a new generation of "smart" orthopaedic implants | en_HK |
dc.type | Conference_Paper | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0730-9244&volume=&spage=434&epage=&date=2006&atitle=Suppression+of+nickel+release+in+nickeltitanium+alloys+by+plasma+immersion+ion+implantation+surface+treatment:+towards+a+new+generation+of+%27smart%27+orthopaedic+implants+(abstract) | en_HK |
dc.description.nature | published_or_final_version | en_HK |
dc.identifier.doi | 10.1109/PLASMA.2006.1707307 | en_HK |
dc.identifier.hkuros | 136973 | - |
dc.customcontrol.immutable | sml 170331 amended | - |
dc.identifier.issnl | 0730-9244 | - |