title: Simultaneous intrusion and retraction using a three-piece base arch.
abstract: Flared incisors and deep overbite are challenging to treat orthodontically. This paper describes the use of a three-piece base arch and Class I elastics to correct deep overbite while simultaneously closing spaces. An analysis of the biomechanics and a discussion of the appliance design are presented to help understand how the incisor axial inclination can be corrected and controlled during orthodontic therapy. A clinical example illustrates the treatment sequence.
authors.affiliation: Baltimore College of Dental Surgery, Dental School, University of Maryland 21201-1586, USA.
authors.forename: B
authors.initials: B
authors.lastname: Shroff
authors.forename: W M
authors.initials: WM
authors.lastname: Yoon
authors.forename: S J
authors.initials: SJ
authors.lastname: Lindauer
authors.forename: C J
authors.initials: CJ
authors.lastname: Burstone
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D008310:Malocclusion / Q000628:therapy*; D009971:Orthodontics, Corrective / Q000379:methods*