title: Wilson maxillary curve analyzed by CBCT. A study on normocclusion and malocclusion individuals.
abstract: The anatomy of dental compensation curve in the frontal plane described by George H. Wilson is one of the occlusal determinants of orthodontic treatment. However, there is few published comparing malocclusion and normocclusion individuals.
  
  
  OBJECTIVE
  The aim of this study is to compare the curve of Wilson at first and second maxillary molars, normocclusion pattern and malocclusion pattern, with and without bilateral posterior crossbite, using angular references in CBCT studies.
  
  
  METHODS
  We analyzed 10 cases of malocclusion with bilateral posterior crossbite, 10 cases of malocclusion without bilateral posterior crossbite and 10 cases with non orthodontic normocclusion (patients who underwent cone beam study for other reasons than orthodontic). All of them were adults, more than 19 years. Angular variables from left and right axis (line connecting the occlusal and furcation groove) of first and second molars towards a perpendicular to the frontal palate were measured. There was carried out an Anova test, Bonferroni analysis and Levene's statistics.
  
  
  RESULTS
  The descriptive analysis of the results shows an average values of total maxillary curve of Wilson for first molars (sum of left and right angle) of 8.1° for normocclusion group, 0.4° for the malocclusion pattern with bilateral posterior crossbite and 16.9° for the malocclusion pattern without this alteration. The mean differences was statistical significant (P<0,042) between between malocclusion pattern groups with and without crossbite .
  
  
  CONCLUSIONS
  The curve of Wilson, measured at maxillary first molars in patients with bilateral posterior crossbite is more concave than the other groups, suggesting no dentoalveolar compensations.
authors: Orthodontics, University of Seville, Spain.
authors: José-María
authors: JM
authors: Barrera
authors: José-María
authors: JM
authors: Llamas
authors: Eduardo
authors: E
authors: Espinar
authors: Carlos
authors: C
authors: Sáenz-Ramírez
authors: Vanesa
authors: V
authors: Paredes
authors: Juan-Carlos
authors: JC
authors: Pérez-Varela
mesh_terms: D000328:Adult; D054893:Cone-Beam Computed Tomography; D006801:Humans; D008310:Malocclusion / Q000000981:diagnostic imaging*; D008437:Maxilla / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D008875:Middle Aged; D055815:Young Adult
references: Am J Orthod Dentofacial Orthop. 1993 Jan;103(1):54-61
references: 8422032
references: Angle Orthod. 1998 Dec;68(6):557-62
references: 9851354
references: Am J Orthod Dentofacial Orthop. 2003 Dec;124(6):615-24
references: 14666073
references: Angle Orthod. 2002 Apr;72(2):146-54
references: 11999938
references: N Y State Dent J. 1947 Oct;13(8):445-62
references: 18895592
references: Int J Prosthodont. 1997 Jan-Feb;10(1):78-82
references: 9484074
references: Angle Orthod. 1992 Winter;62(4):249-56
references: 1456472
references: Clin Oral Investig. 2009 Sep;13(3):247-55
references: 19277728
references: Angle Orthod. 2000 Apr;70(2):129-44
references: 10833001
references: Angle Orthod. 2001 Aug;71(4):257-64
references: 11510634
references: Am J Orthod. 1972 Sep;62(3):296-309
references: 4505873
references: J Nihon Univ Sch Dent. 1997 Jun;39(2):71-7
references: 9293703
references: Am J Orthod Dentofacial Orthop. 2011 Sep;140(3):317-25
references: 21889076
references: Am J Orthod Dentofacial Orthop. 1990 Nov;98(5):422-9
references: 2239841
references: J Dent Res. 2002 Mar;81(3):164-9
references: 11876269
references: Dent Clin North Am. 1969 Jul;13(3):537-54
references: 5255314
references: Am J Orthod Dentofacial Orthop. 2011 Sep;140(3):366-76
references: 21889081
references: Angle Orthod. 2004 Jun;74(3):319-27
references: 15264641
references: Angle Orthod. 2003 Apr;73(2):109-15
references: 12725365
references: Am J Orthod Dentofacial Orthop. 1999 Apr;115(4):401-5
references: 10194284