title: Evaluation of the vertical alterations of the upper second molars after the alignment and leveling phase using the MBT technique.
abstract: OBJECTIVE
  This study aimed at comparing the distocervical angulations of upper second molars crowns of groups with normal occlusion and with Angle Classes I and II malocclusions. Additionally, it aimed to analyze the changes occurring after alignment and leveling performed with MBT technique.
  
  
  METHODS
  The sample of normal occlusions comprised 32 lateral teleradiographs, while the sample of malocclusions comprised 38 initial and post-leveling lateral teleradiographs.
  
  
  RESULTS
  The results did not show statistically significant differences between morphological characteristics of the normal occlusion group and the malocclusion group. On the other hand, after alignment and leveling, statistically significant reduction was observed in distocervical inclinations with extrusion of the distal portion of upper second molars.
authors.forename: Alael Barreiro Fernandes de Paiva
authors.initials: AB
authors.lastname: Lino
authors.forename: Julio Wilson
authors.initials: JW
authors.lastname: Vigorito
mesh_terms: D000293:Adolescent; D000704:Analysis of Variance; D002508:Cephalometry; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008311:Malocclusion, Angle Class I / Q000473:pathology / Q000628:therapy*; D008312:Malocclusion, Angle Class II / Q000473:pathology / Q000628:therapy*; D008437:Maxilla; D008963:Molar / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000473:pathology; D019558:Occlusal Adjustment / Q000379:methods*; D016382:Orthodontic Appliance Design; D050793:Orthodontic Extrusion; D009969:Orthodontic Wires; D018709:Statistics, Nonparametric; D014057:Tomography, X-Ray Computed; D019237:Tooth Cervix / Q000033:anatomy & histology / Q000473:pathology; D019228:Tooth Crown / Q000033:anatomy & histology / Q000473:pathology; D014087:Tooth Movement Techniques / Q000379:methods*; D014716:Vertical Dimension
keywords: Corrective orthodontics; Dental occlusion; Design of orthodontic appliances; Radiography