title: Re: de Souza RM, de Menezes LM. Nickel, chromium and iron levels in the saliva of patients with simulated fixed orthodontic appliances. Angle Orthod. 2008;78:345-350.
mesh_terms: D002857:Chromium / Q000032:analysis*; D006801:Humans; D007501:Iron / Q000032:analysis*; D009532:Nickel / Q000032:analysis*; D016910:Orthodontic Brackets; D012463:Saliva / Q000737:chemistry*
chemical_list: D002857:Chromium; D009532:Nickel; D007501:Iron