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Article: Surface mechanical properties, corrosion resistance, and cytocompatibility of nitrogen plasma-implanted nickel-titanium alloys: A comparative study with commonly used medical grade materials

TitleSurface mechanical properties, corrosion resistance, and cytocompatibility of nitrogen plasma-implanted nickel-titanium alloys: A comparative study with commonly used medical grade materials
Authors
KeywordsCell viability
Nickel-titanium alloy
Osteoblast
Stainless steel
Surface treatment
Titanium
Issue Date2007
PublisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www.interscience.wiley.com/jpages/0021-9304/
Citation
Journal Of Biomedical Materials Research - Part A, 2007, v. 82 n. 2, p. 403-414 How to Cite?
AbstractStainless steel and titanium alloys are the most common metallic orthopedic materials. Recently, nickel-titanium (NiTi) shape memory alloys have attracted much attention due to their shape memory effect and super-elasticity. However, this alloy consists of equal amounts of nickel and titanium, and nickel is a well known sensitizer to cause allergy or other deleterious effects in living tissues. Nickel ion leaching is correspondingly worse if the surface corrosion resistance deteriorates. We have therefore modified the NiTi surface by nitrogen plasma immersion ion implantation (PIII). The surface chemistry and corrosion resistance of the implanted samples were studied and compared with those of the untreated NiTi alloys, stainless steel, and Ti-6Al-4V alloy serving as controls. Immersion tests were carried out to investigate the extent of nickel leaching under simulated human body conditions and cytocompatibility tests were conducted using enhanced green fluorescent protein mice osteoblasts. The X-ray photoelectron spectroscopy results reveal that a thin titanium nitride (TiN) layer with higher hardness is formed on the surface after nitrogen PIII. The corrosion resistance of the implanted sample is also superior to that of the untreated NiTi and stainless steel and comparable to that of titanium alloy. The release of nickel ions is significantly reduced compared with the untreated NiTi. The sample with surface TiN exhibits the highest amount of cell proliferation whereas stainless steel fares the worst. Compared with coatings, the plasma-implanted structure does not delaminate as easily and nitrogen PIII is a viable way to improve the properties of NiTi orthopedic implants. © 2007 Wiley Periodicals, Inc.
Persistent Identifierhttp://hdl.handle.net/10722/68118
ISSN
2015 Impact Factor: 3.263
2015 SCImago Journal Rankings: 0.979
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYeung, KWKen_HK
dc.contributor.authorPoon, RWYen_HK
dc.contributor.authorChu, PKen_HK
dc.contributor.authorChung, CYen_HK
dc.contributor.authorLiu, XYen_HK
dc.contributor.authorLu, WWen_HK
dc.contributor.authorChan, Den_HK
dc.contributor.authorChan, SCWen_HK
dc.contributor.authorLuk, KDKen_HK
dc.contributor.authorCheung, KMCen_HK
dc.date.accessioned2010-09-06T06:01:31Z-
dc.date.available2010-09-06T06:01:31Z-
dc.date.issued2007en_HK
dc.identifier.citationJournal Of Biomedical Materials Research - Part A, 2007, v. 82 n. 2, p. 403-414en_HK
dc.identifier.issn1549-3296en_HK
dc.identifier.urihttp://hdl.handle.net/10722/68118-
dc.description.abstractStainless steel and titanium alloys are the most common metallic orthopedic materials. Recently, nickel-titanium (NiTi) shape memory alloys have attracted much attention due to their shape memory effect and super-elasticity. However, this alloy consists of equal amounts of nickel and titanium, and nickel is a well known sensitizer to cause allergy or other deleterious effects in living tissues. Nickel ion leaching is correspondingly worse if the surface corrosion resistance deteriorates. We have therefore modified the NiTi surface by nitrogen plasma immersion ion implantation (PIII). The surface chemistry and corrosion resistance of the implanted samples were studied and compared with those of the untreated NiTi alloys, stainless steel, and Ti-6Al-4V alloy serving as controls. Immersion tests were carried out to investigate the extent of nickel leaching under simulated human body conditions and cytocompatibility tests were conducted using enhanced green fluorescent protein mice osteoblasts. The X-ray photoelectron spectroscopy results reveal that a thin titanium nitride (TiN) layer with higher hardness is formed on the surface after nitrogen PIII. The corrosion resistance of the implanted sample is also superior to that of the untreated NiTi and stainless steel and comparable to that of titanium alloy. The release of nickel ions is significantly reduced compared with the untreated NiTi. The sample with surface TiN exhibits the highest amount of cell proliferation whereas stainless steel fares the worst. Compared with coatings, the plasma-implanted structure does not delaminate as easily and nitrogen PIII is a viable way to improve the properties of NiTi orthopedic implants. © 2007 Wiley Periodicals, Inc.en_HK
dc.languageengen_HK
dc.publisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www.interscience.wiley.com/jpages/0021-9304/en_HK
dc.relation.ispartofJournal of Biomedical Materials Research - Part Aen_HK
dc.rightsJournal of Biomedical Materials Research Part A. Copyright © John Wiley & Sons, Inc.en_HK
dc.subjectCell viabilityen_HK
dc.subjectNickel-titanium alloyen_HK
dc.subjectOsteoblasten_HK
dc.subjectStainless steelen_HK
dc.subjectSurface treatmenten_HK
dc.subjectTitaniumen_HK
dc.subject.meshBiocompatible Materials - chemistry-
dc.subject.meshCorrosion-
dc.subject.meshGreen Fluorescent Proteins - metabolism-
dc.subject.meshNickel - chemistry-
dc.subject.meshTitanium - chemistry-
dc.titleSurface mechanical properties, corrosion resistance, and cytocompatibility of nitrogen plasma-implanted nickel-titanium alloys: A comparative study with commonly used medical grade materialsen_HK
dc.typeArticleen_HK
dc.identifier.emailYeung, KWK:wkkyeung@hkucc.hku.hken_HK
dc.identifier.emailLu, WW:wwlu@hku.hken_HK
dc.identifier.emailChan, D:chand@hkucc.hku.hken_HK
dc.identifier.emailLuk, KDK:hcm21000@hku.hken_HK
dc.identifier.emailCheung, KMC:cheungmc@hku.hken_HK
dc.identifier.authorityYeung, KWK=rp00309en_HK
dc.identifier.authorityLu, WW=rp00411en_HK
dc.identifier.authorityChan, D=rp00540en_HK
dc.identifier.authorityLuk, KDK=rp00333en_HK
dc.identifier.authorityCheung, KMC=rp00387en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/jbm.a.31154en_HK
dc.identifier.pmid17295246-
dc.identifier.scopuseid_2-s2.0-34447338046en_HK
dc.identifier.hkuros145168en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34447338046&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume82en_HK
dc.identifier.issue2en_HK
dc.identifier.spage403en_HK
dc.identifier.epage414en_HK
dc.identifier.eissn1552-4965-
dc.identifier.isiWOS:000247836600016-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridYeung, KWK=13309584700en_HK
dc.identifier.scopusauthoridPoon, RWY=34572161800en_HK
dc.identifier.scopusauthoridChu, PK=36040705700en_HK
dc.identifier.scopusauthoridChung, CY=8100842800en_HK
dc.identifier.scopusauthoridLiu, XY=8603933800en_HK
dc.identifier.scopusauthoridLu, WW=7404215221en_HK
dc.identifier.scopusauthoridChan, D=7402216545en_HK
dc.identifier.scopusauthoridChan, SCW=55209636300en_HK
dc.identifier.scopusauthoridLuk, KDK=7201921573en_HK
dc.identifier.scopusauthoridCheung, KMC=7402406754en_HK

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