title: Open coiled springs and expansion in non-extraction treatment.
authors.forename: E H
authors.initials: EH
authors.lastname: Williamson
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D008310:Malocclusion / Q000628:therapy*; D009967:Orthodontic Appliances; D009969:Orthodontic Wires; D014087:Tooth Movement Techniques