title: Craniofacial morphology of Chinese patients with bilateral temporomandibular joint osteoarthrosis.
abstract: OBJECTIVE
  To evaluate the morphological features of craniofacial structures in young patients affected by bilateral temporomandibular joint osteoarthrosis (TMJOA).
  
  
  METHODS
  Forty-three males and 189 females aged 15 to 25 years who had lateral cephalograms and temporomandibular joint (TMJ) radiological examinations were included. They were classified into a TMJOA group and a control group, according to TMJ bony status. Thirty-two variables from lateral cephalogram were analysed by t test to evaluate the cranial and dentofacial differences between the two groups.
  
  
  RESULTS
  TMJOA group showed a shorter posterior ramus height and shorter condyles, smaller SNB angle and larger ANB angle, smaller facial plane angle and larger angle of convexity, steeper mandibular plane angle and more vertical y-axis.
  
  
  CONCLUSIONS
  Bilateral TMJOA is associated with dentofacial alterations characterised by a tendency toward retrognathism and shorter mandibles. However, the cause-and-effect relationship is yet to be clarified.
authors: Center for Temporomandibular Disorders and Orofacial Pain, Peking University School and Hospital of Stomatology, Beijing, PR China.
authors: Zhi Peng
authors: ZP
authors: Sun
authors: Bing Shuang
authors: BS
authors: Zou
authors: Yan Ping
authors: YP
authors: Zhao
authors: Xu Chen
authors: XC
authors: Ma
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D002508:Cephalometry; D005145:Face / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000473:pathology*; D010003:Osteoarthritis / Q000150:complications / Q000473:pathology*; D063173:Retrognathia / Q000209:etiology; D019291:Skull Base / Q000473:pathology*; D013705:Temporomandibular Joint Disorders / Q000150:complications / Q000473:pathology*; D055815:Young Adult