[Importance of the so-called Johnson twin wire appliance for orthodontic progress in the United States].
D006801:Humans; D008310:Malocclusion / Q000628:therapy*; D014427:Twins; D014481:United States
MALOCCLUSION/therapy
De betekenis van de zgn. Johnson twin wire appliance voor de ontwikkeling van de orthodontie in de V.S.