title: Passive and active overlay systems.
authors.affiliation: Department of Orthodontics, Royal Dental College, Aarhus University, Vennelyst Boulevard 9, 8000-C Aarhus, Denmark. cverna@odont.au.dk
authors.forename: Carlalberta
authors.initials: C
authors.lastname: Verna
authors.forename: S
authors.initials: S
authors.lastname: Troiani
authors.forename: C
authors.initials: C
authors.lastname: Luzi
authors.forename: Birte
authors.initials: B
authors.lastname: Melsen
mesh_terms: D003799:Dental Stress Analysis; D006801:Humans; D016382:Orthodontic Appliance Design; D009967:Orthodontic Appliances / Q000145:classification*