title: Extrusion-based leveling with segmented arch mechanics.
abstract: Leveling of the dental arch may be accomplished through anterior intrusion, posterior extrusion, or a combination. Posterior extrusion is usually preferred in vertically balanced adolescents and in surgical-orthodontic treatment of adults suffering from deep bite and mandibular deficiency. A major disadvantage of posterior extrusion, when accomplished by continuous archwires, is incisor flaring. Here a segmented arch arrangement is proposed for posterior extrusion that combines the clinical simplicity of continuous mechanics with better control of incisor position.
authors.affiliation: Faculty of Dentistry, University of Tehran and Dental Research Center, Shahid Beheshti University, Iran. noroozih@yahoo.com
authors.forename: Hassan
authors.initials: H
authors.lastname: Noroozi
authors.forename: Hassan
authors.initials: H
authors.lastname: Moeinzad
mesh_terms: D000293:Adolescent; D000328:Adult; D001641:Bicuspid / Q000473:pathology; D001696:Biomechanical Phenomena; D003481:Cuspid / Q000473:pathology; D003724:Dental Arch / Q000473:pathology*; D006801:Humans; D007180:Incisor / Q000473:pathology; D008310:Malocclusion / Q000601:surgery / Q000628:therapy*; D008334:Mandible / Q000002:abnormalities / Q000601:surgery; D008963:Molar / Q000473:pathology; D016382:Orthodontic Appliance Design; D016910:Orthodontic Brackets; D009969:Orthodontic Wires; D014087:Tooth Movement Techniques / Q000295:instrumentation / Q000379:methods*; D014716:Vertical Dimension