Reduction of Ni release and improvement of the friction behaviour of NiTi orthodontic archwires by oxidation treatments
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hdl:2117/15519
Document typeArticle
Defense date2011-03-25
Rights accessRestricted access - publisher's policy
Abstract
This work studies NiTi orthodontic archwires
that have been treated using a new oxidation treatment for
obtaining Ni-free surfaces. The titanium oxide on the surface
significantly improves corrosion resistance and
decreases nickel ion release, while barely affecting transformation
temperatures. This oxidation treatment avoids
the allergic reactions or toxicity in the surrounding tissues
produced by the chemical degradation of the NiTi. In the
other hand, the lack of low friction coefficient for the NiTi
superelastic archwires makes difficult the optimal use of
these materials in Orthodontic applications. In this study,
the decrease of this friction coefficient has been achieved
by means of oxidation treatment. Transformation temperatures,
friction coefficient and ion release have been
determined.
CitationEspinar, E. [et al.]. Reduction of Ni release and improvement of the friction behaviour of NiTi orthodontic archwires by oxidation treatments. "Journal of materials science. Materials in medicine", 25 Març 2011, vol. 22, p. 1119-1125.
ISSN0957-4530
Publisher versionhttp://www.springerlink.com/content/h3qh367257r114gh/fulltext.pdf
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