The Fraenkel appliance--avoidance of lower incisor proclination.
Eirew
H L
HL
McDowell
F
F
Phillips
J G
JG
D000202:Activator Appliances; D004867:Equipment Design; D006801:Humans; D007180:Incisor / Q000473:pathology*; D008310:Malocclusion / Q000628:therapy*; D008312:Malocclusion, Angle Class II / Q000473:pathology / Q000628:therapy*; D009968:Orthodontic Appliances, Removable