title: The effect of premolar extractions on incisor position and soft tissue profile in patients with Class II, Division 1 malocclusion.
abstract: OBJECTIVE
  The objective of this study was to establish whether and how premolar extraction affects the soft tissue profile and incisor inclination in patients with Angle Class II, Division 1 malocclusion. Our primary intention was to identify differences between patients who had four premolars extracted and those who had only two upper premolars removed during camouflage treatment. Our control group consisted of patients with an Angle Class II, Division 1 treated without extractions.
  
  
  METHODS
  These patients' lateral cephalograms were cephalometrically analyzed before and after treatment. Computer-assisted analysis of the data using Onyx Ceph was followed by a single-factor variance analysis (one-way ANOVA).
  
  
  RESULTS
  Our results demonstrate that patients who have undergone camouflage treatment exhibit significantly more retruded upper central incisors than those with extractions in both jaws, and that their upper incisors are highly significantly more retruded and their mandibles significantly more retrognathic than those of patients who have not undergone extraction therapy.
  
  
  CONCLUSIONS
  We did not observe that the patients' profiles did become worse after extraction therapy.
authors.affiliation: Klinik für Kieferorthopädie, Universitätsklinikum des Saarlandes, Homburg/Saar, Germany. catharina.weyrich@uks.eu
authors.forename: Catharina
authors.initials: C
authors.lastname: Weyrich
authors.forename: Jörg A
authors.initials: JA
authors.lastname: Lisson