title: [Dental arch form reverting by four-point method].
abstract: OBJECTIVE
  To explore a simple method of reverting individual dental arch form template for wire bending.
  
  
  METHODS
  Individual dental arch form was reverted by four-point method. By defining central point of bracket on bilateral lower second premolar and first molar, certain individual dental arch form could be generated. The arch form generating procedure was then be developed to computer software for printing arch form. Four-point method arch form was evaluated by comparing with direct model measurement on linear and angular parameters. The accuracy and reproducibility were assessed by paired t test and concordance correlation coefficient with Medcalc 9.3 software package.
  
  
  RESULTS
  The arch form by four-point method was of good accuracy and reproducibility (linear concordance correlation coefficient was 0.9909 and angular concordance correlation coefficient was 0.8419).
  
  
  CONCLUSIONS
  The dental arch form reverted by four-point method could reproduce the individual dental arch form.
authors.affiliation: Department of Orthodontics, College of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Research Institution of Stomatology, Shanghai, China.
authors.forename: Xiao-Gang
authors.initials: XG
authors.lastname: Pan
authors.forename: Yu-Fen
authors.initials: YF
authors.lastname: Qian
authors.forename: Si-En
authors.initials: SE
authors.lastname: Weng
authors.forename: Qi-Ping
authors.initials: QP
authors.lastname: Feng
authors.forename: Quan
authors.initials: Q
authors.lastname: Yu
mesh_terms: D001641:Bicuspid; D003724:Dental Arch; D003765:Models, Dental; D008963:Molar; D015203:Reproducibility of Results