New developments in jewellery and dental materials.

This communication reviews the latest alloys introduced in the fields of jewellery and dental prostheses. For this we have scanned current patents and others to which we have access, and it is evident that, although not always correctly used, the words "antiallergic", "hypoallergic", "non-allergic", "to avoid allergies", etc., now appear frequently, indicating manufacturers' awareness of the problems that nickel can cause. On the other hand, the problems that may be associated with other sensitizing metals, such as cobalt and palladium, are not yet addressed.