title: A new look at an old appliance.
mesh_terms: D000202:Activator Appliances; D003766:Dental Occlusion; D006801:Humans; D008310:Malocclusion / Q000517:prevention & control; D009055:Mouth / Q000502:physiology; D009968:Orthodontic Appliances, Removable; D009972:Orthodontics, Interceptive