title: Mandibular dimensions of subjects with asymmetric skeletal class III malocclusion and normal occlusion compared with cone-beam computed tomography.
abstract: BACKGROUND
  The purpose of this study was to use cone-beam computed tomography to compare mandibular dimensions in subjects with asymmetric skeletal Class III malocclusion and those with normal occlusion.
  
  
  METHODS
  Cone-beam computed tomography scans of 38 subjects with normal occlusion and 28 patients with facial asymmetry were evaluated and digitized with Invivo software (Anatomage, San Jose, Calif). Three midsagittal and 13 right and left measurements were taken. The paired t test was used to compare the right and left sides in each group. The Mann-Whitney U test was used to compare the midsagittal variables and the differences between the 2 sides of the group with normal occlusion with those of asymmetry patients.
  
  
  RESULTS
  The posterior part of the mandibular body showed significant differences between the deviated and nondeviated sides in asymmetric Class III patients. The difference of the asymmetry group was significantly greater than that of the normal occlusion group for the mediolateral ramal and the anteroposterior condylar inclinations (P = 0.007 and P = 0.019, respectively).
  
  
  CONCLUSIONS
  The asymmetric skeletal Class III group showed significant differences in condylar height, ramus height, and posterior part of the mandibular body compared with the subjects with normal occlusion. These results might be useful for diagnosis and treatment planning of asymmetric Class III patients.
authors.affiliation: Graduate School of Clinical Dental Science, Catholic University of Korea, Seoul, Korea.
authors.forename: HyoYeon
authors.initials: H
authors.lastname: Lee
authors.forename: Mohamed
authors.initials: M
authors.lastname: Bayome
authors.forename: Seong-Hun
authors.initials: SH
authors.lastname: Kim
authors.forename: Ki Beom
authors.initials: KB
authors.lastname: Kim
authors.forename: Rolf G
authors.initials: RG
authors.lastname: Behrents
authors.forename: Yoon-Ah
authors.initials: YA
authors.lastname: Kook
mesh_terms: D002508:Cephalometry / Q000379:methods; D002680:Chin / Q000000981:diagnostic imaging; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003766:Dental Occlusion; D004424:Ear Canal / Q000000981:diagnostic imaging; D005146:Facial Asymmetry / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008297:Male; D008313:Malocclusion, Angle Class III / Q000000981:diagnostic imaging*; D008334:Mandible / Q000000981:diagnostic imaging*; D008335:Mandibular Condyle / Q000000981:diagnostic imaging; D009295:Nasal Bone / Q000000981:diagnostic imaging; D009915:Orbit / Q000000981:diagnostic imaging; D055815:Young Adult