title: [Transverse expansion: the orthopedic effect of the Quadhelix].
mesh_terms: D004867:Equipment Design; D006801:Humans; D009967:Orthodontic Appliances; D010155:Palatal Expansion Technique / Q000295:instrumentation*
vernacular_title: Espansione trasvesale: l'effetto ortopedico del '"Quadhelix".