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Nickel concentration in the saliva of patients with nickel-titanium orthodontic appliances.

AbstractINTRODUCTION:
The purpose of this study was to examine whether nickel-titanium (Ni-Ti) archwires cause an increase of nickel concentration in the saliva of 18 orthodontic patients to estimate the possible risk of these archwires in patients who have nickel hypersensitivity.
METHODS:
Saliva samples were collected before orthodontic treatment, after placement of the bands and brackets, 2 weeks later and before placing the Ni-Ti archwires, immediately after placing the Ni-Ti archwires, 4 weeks after placing the wires, and 8 weeks after placing the wires.
RESULTS:
By using mass spectrometry, no statistically significant differences were found in the nickel concentrations in the samples taken without appliances, in those obtained 2 weeks after placement of the bands and brackets, and 4 and 8 weeks after placement of the archwires. Samples taken immediately after placement of the bands and brackets and the Ni-Ti archwires showed slight but significant increases in nickel concentration of 78 and 56 microg per liter, respectively, compared with the pretreatment value of 34 microg per liter.
CONCLUSIONS:
Nickel leaching occurred after placement of the bands and brackets and after placement of the Ni-Ti archwires, associated with an increase of the nickel ion concentration in the patient's saliva. This effect decreased within 10 weeks.
AuthorsEvangelia Petoumenou, Martin Arndt, Ludger Keilig, Susanne Reimann, Hildegard Hoederath, Theodore Eliades, Andreas Jäger, Christoph Bourauel
JournalAmerican journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics (Am J Orthod Dentofacial Orthop) Vol. 135 Issue 1 Pg. 59-65 (Jan 2009) ISSN: 1097-6752 [Electronic] United States
PMID19121502 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Dental Alloys
  • titanium nickelide
  • Stainless Steel
  • Nickel
  • Titanium
Topics
  • Adolescent
  • Child
  • Corrosion
  • Dental Alloys (chemistry)
  • Female
  • Follow-Up Studies
  • Humans
  • Male
  • Mass Spectrometry
  • Materials Testing
  • Microscopy, Electron, Scanning
  • Nickel (chemistry)
  • Orthodontic Brackets
  • Orthodontic Wires
  • Saliva (chemistry)
  • Stainless Steel (chemistry)
  • Surface Properties
  • Titanium (chemistry)

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