Nickel allergies in orthodontics

Abstract

Nickel (Ni) is a common component in many orthodontic materials. An allergy to Ni is commonly seen in the population, more frequently in women. Possible allergy to Ni should be a question in the initial patient health history questionnaire. The orthodontic practitioner should be mindful of this allergy during the course of treatment and know how to diagnose a Ni allergy if it appears and subsequent action in treatment and referral if it is suspected. This paper provides a summary of Ni allergy, its epidemiology, diagnosis and recommendations and alternatives to treatment.