title: Distalization pattern of the maxillary arch depending on the number of orthodontic miniscrews.
abstract: OBJECTIVE
  To determine the effects of linear force vector(s) from interradicular miniscrews on the distalization pattern of the maxillary arch in adult Class II patients.
  
  
  METHODS
  Twenty-five adult patients with mild to moderate Class II dentition and minimal crowding were collected. Either single (group A, n  =  12) or dual (group B, n  =  13) miniscrews were inserted on the posterior interradicular area to deliver a distalizing force to the main archwire. The displacement patterns of maxillary incisors and molars were measured and compared.
  
  
  RESULTS
  Significant distalization in the molars and incisors was shown in both groups. Significantly greater distalization and intrusion of the first molar and intrusive displacement of the incisor, together with significant reduction of the mandibular plane, were noted in group B, in contrast to the rotation of the occlusal plane in group A.
  
  
  CONCLUSIONS
  Interradicular miniscrews predictably induced total arch distalization, leading to the correction of Class II. Additional miniscrews in the premolar area appear to facilitate intrusion and distalization of the entire arch according to the position of the force vectors.
authors.affiliation: Department of Orthodontics, Eberhard Karls University, Tübingen, Germany.
authors.forename: Till E
authors.initials: TE
authors.lastname: Bechtold
authors.forename: Jin-Wook
authors.initials: JW
authors.lastname: Kim
authors.forename: Tae-Hyun
authors.initials: TH
authors.lastname: Choi
authors.forename: Young-Chel
authors.initials: YC
authors.lastname: Park
authors.forename: Kee-Joon
authors.initials: KJ
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D000328:Adult; D001863:Bone Screws; D002508:Cephalometry; D003724:Dental Arch / Q000473:pathology*; D003799:Dental Stress Analysis; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000473:pathology / Q000628:therapy*; D008437:Maxilla; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation*; D016382:Orthodontic Appliance Design; D018709:Statistics, Nonparametric; D014087:Tooth Movement Techniques / Q000295:instrumentation*; D055815:Young Adult