title: Study between anb angle and Wits appraisal in cone beam computed tomography (CBCT).
abstract: OBJECTIVE
  To analyse the ANB and Wits values and to study correlations between those two measurements and other measurements in diagnosing the anteroposterior maxilo-mandibular relationship with CBCT.
  
  
  METHODS
  Ninety patients who had previously a CBCT (i-CAT®) as a diagnostic register were selected. A 3D cephalometry was designed using one software package, InVivo5®. This cephalometry included 3 planes of reference, 3 angle measurements and 1 linear measurement. The means and standard deviations of the mean of each measurement were assessed. After that, a Pearson's correlation coefficient has been performed to analyse the significance of each relationship.
  
  
  RESULTS
  When classifying the sample according to the anteroposterior relationship, the values obtained of ANB (Class I: 53%; Class II: 37%; Class III: 10%) and Wits (Class I: 35%; Class II: 56%; Class III: 9%) did not coincide, except for the Class III group. However, of the patients classified differently (Class I and Class II patients) by ANB and Wits, a high percentage of individuals (n=22; 49%), had a mesofacial pattern with a mandibular plane angle within normal values. A correlation has been found between ANB and Wits (r=0,262), occlusal plane angle and ANB (r=0,426), and mandibular plane angle and Wits (r=0,242). No correlation was found between either Wits or ANB in relation with the age of the individuals.
  
  
  CONCLUSIONS
  ANB and Wits must be included in 3D cephalometric analyses as both are necessary to undertake a more accurate diagnosis of the maxillo-mandibular relationship of the patients.
authors.affiliation: Department of Orthodontics, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain. nataz84@hotmail.com
authors.forename: Natalia
authors.initials: N
authors.lastname: Zamora
authors.forename: Rosa
authors.initials: R
authors.lastname: Cibrián
authors.forename: Jose-Luis
authors.initials: JL
authors.lastname: Gandia
authors.forename: Vanessa
authors.initials: V
authors.lastname: Paredes
mesh_terms: D000293:Adolescent; D000328:Adult; D002508:Cephalometry / Q000379:methods*; D002648:Child; D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008334:Mandible / Q000033:anatomy & histology*; D008437:Maxilla / Q000033:anatomy & histology*; D055815:Young Adult