The hemi-monobloc.
D000202:Activator Appliances; D002508:Cephalometry; D004867:Equipment Design; D006801:Humans; D008310:Malocclusion / Q000150:complications / Q000628:therapy*; D009968:Orthodontic Appliances, Removable; D012130:Respiratory Hypersensitivity / Q000150:complications; D014087:Tooth Movement Techniques / Q000295:instrumentation*