title: The use of the activator to achieve molar correction and accelerate lower premolar extraction space closure.
mesh_terms: D000202:Activator Appliances; D001641:Bicuspid / Q000601:surgery*; D004867:Equipment Design; D006801:Humans; D008310:Malocclusion / Q000628:therapy*; D008311:Malocclusion, Angle Class I / Q000628:therapy*; D008963:Molar; D009968:Orthodontic Appliances, Removable; D014081:Tooth Extraction; D014087:Tooth Movement Techniques / Q000295:instrumentation