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Chinese Journal of Dental Research
Chin J Dent Res 14 (2011), No. 1     15. June 2011
Chin J Dent Res 14 (2011), No. 1  (15.06.2011)

Page 21-27, PubMed:21734943

Craniofacial Morphology of Chinese Patients with Bilateral Temporomandibular Joint Osteoarthrosis
Sun, Zhi Peng / Zou, Bing Shuang / Zhao, Yan Ping / Ma, Xu Chen
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.
Conclusion: 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.

Keywords: cephalometrics, osteoarthrosis, temporomandibular joint