title: Mandibular symphysis morphology and dimensions in different anteroposterior jaw relationships.
abstract: OBJECTIVE
  To assess the morphology and dimensions of mandibular symphysis (MS) in different anteroposterior jaw relationships and to investigate whether craniofacial parameters have any correlation with its shape and/or dimensions.
  
  
  METHODS
  Lateral cephalograms of subjects with Class I, Class II, and Class III skeletal relationships were traced. Several craniofacial and MS parameters were measured. MS parameters were compared between the three groups using analysis of variance and were correlated with the craniofacial parameters using the Pearson correlation coefficient.
  
  
  RESULTS
  Larger angle of concavity of the chin, more inclination of the alveolar bone toward the mandibular plane, and larger MS dimensions and area (P < .001) were found with a Class III skeletal relationship compared to Class I and Class II relationships. The Pearson correlation coefficient between Id-Me and AFH was r  =  0.83 and between Id-Me and LAFH it was r  =  0.81.
  
  
  CONCLUSIONS
  The dimensions and configuration of MS in the Class III relationship were different than those in Class I and Class II relationships; the alveolar part of MS compensated for the skeletal relationship in the Class III pattern. MS dimensions were strongly correlated to anterior facial dimensions.
authors.affiliation: a  Associate Professor, Department of Preventive Dentistry/Orthodontics, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan.
authors.forename: Susan N
authors.initials: SN
authors.lastname: Al-Khateeb
authors.forename: Emad F
authors.initials: EF
authors.lastname: Al Maaitah
authors.forename: Elham S
authors.initials: ES
authors.lastname: Abu Alhaija
authors.forename: Serene A
authors.initials: SA
authors.lastname: Badran
mesh_terms: D000539:Alveolar Process / Q000473:pathology; D002508:Cephalometry / Q000379:methods; D002680:Chin / Q000473:pathology; D003724:Dental Arch / Q000473:pathology; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007180:Incisor / Q000473:pathology; D008297:Male; D008311:Malocclusion, Angle Class I / Q000473:pathology*; D008312:Malocclusion, Angle Class II / Q000473:pathology*; D008313:Malocclusion, Angle Class III / Q000473:pathology*; D008334:Mandible / Q000473:pathology*; D009295:Nasal Bone / Q000473:pathology; D012737:Sex Factors; D055815:Young Adult
references.citation: J Orthod. 2001 Dec;28(4):297-300
references.pmid: 11709595
references.citation: Acta Odontol Scand. 1966 Sep;24(2):109-27
references.pmid: 5225742
references.citation: Angle Orthod. 2007 Sep;77(5):766-72
references.pmid: 17685772
references.citation: Angle Orthod. 2007 Nov;77(6):1079-84
references.pmid: 18004906
references.citation: Angle Orthod. 1992 Fall;62(3):203-10
references.pmid: 1416240
references.citation: Aesthetic Plast Surg. 2007 Jul-Aug;31(4):384-91
references.pmid: 17549558
references.citation: Proc Natl Acad Sci U S A. 1997 Sep 30;94(20):10750-5
references.pmid: 11038582
references.citation: Am J Orthod. 1969 Jun;55(6):585-99
references.pmid: 5253957
references.citation: Am J Orthod Dentofacial Orthop. 2011 Apr;139(4 Suppl):e377-89
references.pmid: 21435546
references.citation: Angle Orthod. 2005 Jul;75(4):506-9
references.pmid: 16097217
references.citation: Angle Orthod. 2006 Jul;76(4):577-84
references.pmid: 16808562
references.citation: Hum Biol. 2005 Dec;77(6):735-59
references.pmid: 16715835
references.citation: J Oral Maxillofac Surg. 1984 May;42(5):295-305
references.pmid: 6585502
references.citation: PLoS One. 2011;6(5):e20241
references.pmid: 21655288
references.citation: Angle Orthod. 2010 Jan;80(1):86-90
references.pmid: 19852645
references.citation: Br J Orthod. 1980 Jul;7(3):145-61
references.pmid: 6934010
references.citation: Am J Orthod Dentofacial Orthop. 2001 Jun;119(6):640-9
references.pmid: 11395709
references.citation: Eur J Orthod. 2002 Oct;24(5):493-9
references.pmid: 12407945
references.citation: Int J Oral Sci. 2009 Dec;1(4):217-23
references.pmid: 20690425
references.citation: Am J Orthod. 1983 May;83(5):382-90
references.pmid: 6573846
references.citation: Am J Orthod. 1984 Nov;86(5):359-70
references.pmid: 6594058
references.citation: Angle Orthod. 2011 Mar;81(2):211-6
references.pmid: 21208071
references.citation: Am J Phys Anthropol. 1998 Jan;105(1):73-87
references.pmid: 9537929