Three-dimensional dental arch and palatal form changes after extraction and nonextraction treatment. Part 3. Transversal and sagittal palatal form.
The purpose of this study was to investigate changes in the palatal form in patients treated with and without premolar extractions. Records collected at pretreatment, at bracket removal, at the end of retention, and 5 years out of retention were examined. Stone casts were mounted on an articulator with an anatomic face-bow and a central wax record, and measurements were made with a 3-dimensional digitizer. The hypothesis that orthodontic treatment with premolar extractions changes the palatal form was verified.
Heiser
Wolfgang
W
Department of Internal Medicine, University of Innsbruck, Innsbruck, Austria. Dr.Heiser@aon.at
Niederwanger
Andreas
A
Bancher
Beatrix
B
Bittermann
Gabriele
G
Neunteufel
Nikolaus
N
Kulmer
Siegfried
S
D000293:Adolescent; D000328:Adult; D001641:Bicuspid / Q000601:surgery; D002508:Cephalometry; D002648:Child; D003724:Dental Arch / Q000033:anatomy & histology*; D003766:Dental Occlusion; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D003765:Models, Dental; D009971:Orthodontics, Corrective / Q000379:methods* / Q000706:statistics & numerical data; D010159:Palate / Q000033:anatomy & histology*; D012044:Regression Analysis; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted; D014081:Tooth Extraction / Q000706:statistics & numerical data; D016896:Treatment Outcome