title: Bolton tooth size ratio and its relation with arch widths, arch length and arch perimeter: a cone beam computed tomography (CBCT) study.
abstract: OBJECTIVE
  The prime aim of the study was to measure and compare the 3D CBCT Bolton tooth size ratio in relation to the upper and lower arch widths, arch length and arch perimeter.
  
  
  METHODS
  The data source was CBCT high volumetric data from the archives. Tooth size, arch widths, arch length and arch perimeter were measured in maxilla and mandibular arches. The independent t-test and ANOVA were used for statistical analyses.
  
  
  RESULTS
  The female Bolton anterior ratio (BAR) (78.373) and Bolton overall ratio (BOR) (93.231) show a greater tooth size ratio in comparison to male BAR (77.162) and BOR (93.124), respectively. However, no significant difference was found in the sexual comparison of all the measurements. Tooth size ratio in arch width groups also showed no significant difference. Significant discrepancies in the arch length (p < 0.05) groups and overall ratio and in the arch perimeter groups (p < 0.05 and p < 0.01) and anterior ratio were revealed.
  
  
  CONCLUSIONS
  Tooth size ratios during orthodontic treatment for different arch length and arch perimeter groups need to be evaluated carefully.
authors.affiliation: Orthodontic Unit.
authors.forename: Mohammad Khursheed
authors.initials: MK
authors.lastname: Alam
authors.forename: Fazal
authors.initials: F
authors.lastname: Shahid
authors.forename: Kathiravan
authors.initials: K
authors.lastname: Purmal
authors.forename: Basaruddin
authors.initials: B
authors.lastname: Ahmad
authors.forename: Mohd Fadhli
authors.initials: MF
authors.lastname: Khamis
mesh_terms: D001641:Bicuspid / Q000000981:diagnostic imaging; D002508:Cephalometry / Q000379:methods; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003481:Cuspid / Q000000981:diagnostic imaging; D003724:Dental Arch / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods; D007180:Incisor / Q000000981:diagnostic imaging; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging; D008437:Maxilla / Q000000981:diagnostic imaging; D008963:Molar / Q000000981:diagnostic imaging; D009811:Odontometry / Q000379:methods*; D012737:Sex Factors; D014070:Tooth / Q000000981:diagnostic imaging*
keywords: 3D CBCT; arch length; arch perimeters; arch width; tooth size ratio