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2. Ingen okning av bevirkningrapporter om plastfyllinger;Björkman;Den Norske Tannlegeforenings Tidene,2001
3. Composition and in vitro corrosion of orthodontic appliances;Grimsdottir;Am J Orthod Dentofacial Orthop,1992
4. Orthodontic wires;Brantley,2001
5. In vivo aging of orthodontic alloys: implications for corrosion potential, nickel release, and biocompatibility;Eliades;Angle Orthod,2002