title: Cephalometric comparison of vertical changes between Begg and preadjusted edgewise appliances.
abstract: The purpose of this retrospective study was to quantify and compare the vertical dimensional changes in bialveolar dental protrusion patients undergoing extraction of all four first premolars between the preadjusted edgewise appliance (PEA) and the Begg appliance. The cephalometric records of 55 patients (14 males and 41 females) with Class I bimaxillary protrusion were selected and divided into two groups based on the appliance used, i.e Begg or PEA mechanotherapy. To minimize the effects of growth, the subjects were at least in stage VI of skeletal maturation. The mean age was 18.25 ± 3.2 years for the Begg group and 18.03 ± 3.5 years for the PEA group. Skeletal and dental changes were analysed in both groups on lateral cephalograms taken pre- (T1) and post- (T2) treatment. A Student's t-test was used to analyse the treatment changes. Within group results showed a significant increase in face height and extrusion and mesial movement of the upper and lower molars for both groups. However, no significant differences were observed when the groups were compared. A significant correlation was found between the change in lower molar to mandibular plane angle and lower anterior face height for both groups. No significant difference was found when the Begg mechanotherapy was compared to the PEA technique on vertical dimensional changes. It can be speculated that mesial movement of the molars tended to keep pace with their extrusion and negated any bite opening effect with both mechanotherapies.
authors: Division of Orthodontics, Department of Craniofacial Sciences, School of Dental Medicine, University of Connecticut, Farmington, CT 06030-1725, USA. chhibber@gde.uchc.edu
authors: Aditya
authors: A
authors: Chhibber
authors: Madhur
authors: M
authors: Upadhyay
authors: V Surendra
authors: VS
authors: Shetty
authors: Subraya
authors: S
authors: Mogra
mesh_terms: D000293:Adolescent; D001641:Bicuspid / Q000601:surgery; D001696:Biomechanical Phenomena; D002508:Cephalometry / Q000379:methods*; D003481:Cuspid / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000473:pathology; D008297:Male; D008311:Malocclusion, Angle Class I / Q000628:therapy; D008312:Malocclusion, Angle Class II / Q000628:therapy; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology; D008963:Molar / Q000473:pathology; D009295:Nasal Bone / Q000473:pathology; D016382:Orthodontic Appliance Design; D016910:Orthodontic Brackets; D019516:Orthodontic Space Closure / Q000295:instrumentation; D009969:Orthodontic Wires; D012189:Retrospective Studies; D013193:Stainless Steel / Q000737:chemistry; D014081:Tooth Extraction; D014087:Tooth Movement Techniques / Q000295:instrumentation*; D014716:Vertical Dimension
chemical_list: D013193:Stainless Steel