To assess the surface changes and the release of nickel ions from Nickel-titanium(NiTi) and chromium ions from stainless steel (SS) orthodontic wires on exposure to Betadine Mouthwash

Abstract

Introduction: Resistance to degradation and corrosion is a necessity for orthodontic arch wires. Nickel ions and chromium ions can be released from Nickel-titanium and Stainless steel orthodontics arch wires and it can cause various reactions in the body such as allergy and cytotoxicity. This is an in-vitro studywhich has been done to assess the surface changes and the release of nickel ions from Nickel-titaniumand chromium ions from stainless steel (SS) orthodontic wires on exposure to Betadine Mouthwash.

Methods: The study was done on Stainless steel and Nickel-titanium orthodontic arch wires. The samples were immersed in Betadine mouthwash for 1,6,12,24, and 168 hours. SEM analysis was used to study the surface characterisation and EDS was used to quantify the elemental percentage of Nickel in NiTi and Chromium in Stainless steel wire.

Results: changes in Nickel ion concentration was seen in Niti wires, stainless steel wires were relatively stable and no change in Chromium ion concentration was seen.

Conclusions: Nickel ions are released from orthodontic archwires when immersed in betadine gargle.SS wires are relatively stable in betadine solution compared to NiTi wires.