Abstract
The amount of nickel ions released from orthodontic wires and brackets is of interest to dentists. The amount of nickel ions emitted from a combination of one of the five arch wires (NiTi, SS, Cu NiTi, Co-Cr-Ni alloys and ion implanted NiTi), five orthodontic brackets and one band was investigated. The wire was 0.016 inches in length. Data shows the release of Ni ion from assembly of orthodontic archwire, orthodontic brackets and orthodontic band in all categories at all-time checkpoints with maximum increase in release of Ni from baselines to 7(th) day. Thereafter, release of Ni decreased as the time duration increased in all categories. Hence, there is significant release of Ni ion from orthodontic archwire and orthodontic brackets. Thus, orthodontic therapy for patients who are Ni sensitive may be difficult.