title: The function regulator of Frankel.
mesh_terms: D000202:Activator Appliances; D003724:Dental Arch / Q000033:anatomy & histology; D003761:Dental Impression Technique; D006801:Humans; D007574:Jaw Relation Record; D008313:Malocclusion, Angle Class III / Q000517:prevention & control; D009968:Orthodontic Appliances, Removable; D009972:Orthodontics, Interceptive / Q000295:instrumentation; D013997:Time Factors