Influence of the microstructure on electrochemical corrosion and nickel release in NiTi orthodontic archwires

被引：24

作者：

Briceno, J. ^{[1
]}

Romeu, A. ^{[1
]}

Espinar, E. ^{[2
]}

Llamas, J. M. ^{[2
]}

Gil, F. J. ^{[3
,4
]}

机构：

[1] Univ Barcelona, Fac Dent, Barcelona, Spain

[2] Univ Seville, Fac Dent, Seville, Spain

[3] Tech Univ Catalonia, ETSEIB, Barcelona 08028, Spain

[4] CIBERBBN, Biomed Res Networking Ctr Bioengn Biomat & Nanome, Zaragoza, Spain

来源：

MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS | 2013年 / 33卷 / 08期

关键词：

Orthodontic archwires; Superelasticity; Corrosion; Ni ion release; Shape memory; IN-VITRO; ARTIFICIAL SALIVA; METAL-IONS; WIRES; ALLOYS; BIOCOMPATIBILITY; TITANIUM; FLUORIDE; DIFFERENTIATION; PROLIFERATION;

D O I：

10.1016/j.msec.2013.08.024

中图分类号：

TB3 [工程材料学]; R318.08 [生物材料学];

学科分类号：

0805 ; 080501 ; 080502 ;

摘要：

The aim of this work was to determine the influence of the present phases and the chemical composition on the corrosion behavior and the nickel ion release of the NiTi orthodontic archwires. Eight Ni-Ti archwires from six commercial brands, in the as-received condition, were studied. The chemical composition, roughness, microstructure and the proportion of the phases as well as the corrosion behavior were analyzed for each archwire. The nickel ion release was characterized in artificial saliva immersion settings ranging up to 4 weeks. The results show that the presence of the martensitic phase improves corrosion resistance and significantly decreases Ni release into exterior medium in comparison with the austenitic specimens. In spite of the partial loss of superelasticity produced in the martensitic phase, it could be of great interest for biomedical applications, as it could minimize sensitization and allergies and improve biocompatibility and corrosion resistance of NiTi shape memory alloys. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：4989 / 4993

页数：5

共 38 条

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