Nickel allergy - Is it a cause of concern in everyday dental practice?

Nickel is a constituent of many dental alloys. This article reviews papers published in regard to biological reactions to nickel in dentistry. Nickel is a common allergen but there is no evidence that patients are at signifi­cant risk of developing sensitivity solely due to contact with nickel-containing dental appliances and restorations. Allergic reactions are more likely to occur with prior sensitization from non-dental contacts. Some nickel compounds, which are mildly cytotoxic, have been implicated as carcinogens by inhalation in industrial settings, but these compounds are not present in dental related operations. It is concluded that subjected to recommendations for practitioners and technicians, nickel containing dental alloys do not pose a risk to patients or members of the dental team. Keywords: Nickel; Allergy; Dental alloy