[Dental arch form reverting by four-point method].
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.
Pan
Xiao-Gang
XG
Department of Orthodontics, College of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Research Institution of Stomatology, Shanghai, China.
Qian
Yu-Fen
YF
Weng
Si-En
SE
Feng
Qi-Ping
QP
Yu
Quan
Q
D001641:Bicuspid; D003724:Dental Arch; D003765:Models, Dental; D008963:Molar; D015203:Reproducibility of Results