title: A universal retraction spring.
authors.affiliation: Department of Orthodontics, Faculty of Health Sciences, Aarhus University, Denmark.
authors.forename: P
authors.initials: P
authors.lastname: Gjessing
mesh_terms: D001696:Biomechanical Phenomena; D002508:Cephalometry; D002648:Child; D003481:Cuspid; D003799:Dental Stress Analysis; D005260:Female; D006801:Humans; D008312:Malocclusion, Angle Class II / Q000628:therapy; D008437:Maxilla; D016382:Orthodontic Appliance Design; D014087:Tooth Movement Techniques / Q000295:instrumentation*