Multi-Element Ion Release from Stainless Steel and Nickel–Titanium Orthodontic Archwires in Neutral and Fluoride-Containing Artificial Saliva: A Factorial In Vitro ICP-OES Study
In vitro study quantifies ion release from orthodontic archwires in saliva, suggesting material selection considerations for nickel-sensitive patients.
Key Points
The study aims to assess the release of metal ions from orthodontic archwires in different saliva conditions and evaluate the influence of manufacturers.
Non-parametric tests were used to analyze ion release quantified by ICP-OES from four manufacturers' archwires immersed in neutral and fluoride-containing artificial saliva.
Archwires tested included stainless steel (SS) and nickel-titanium (NiTi) varieties, measured over 35 days at six time points.
NiTi archwires released significantly more nickel than SS in fluoride saliva (p = 0.029).
American Orthodontics NiTi released more nickel than Dentaurum and Ormco (p = 0.005).
Ormco SS released three times more iron compared to other SS wires (p = 0.003).