West China Journal of Stomatology ›› 2023, Vol. 41 ›› Issue (3): 297-304.doi: 10.7518/hxkq.2023.2023032

• Clinical Research • Previous Articles     Next Articles

Imaging study on the relationship between anterior and posterior occlusal planes and temporomandibular osteoarthrosis

Zhong Jiawei(), Fan Peidi, Hu Shoushan, Gao Xinlin, Li Yijun, Wang Jun, Xiong Xin.()   

  1. State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2023-02-02 Revised:2023-04-20 Online:2023-06-01 Published:2023-06-02
  • Contact: Xiong Xin. E-mail:2066722294@qq.com;drxiongxin@scu.edu.cn
  • Supported by:
    Technological Innovation Research and Development Project of Chengdu Science and Technology Bureau(2022-YF05-01691-SN);New Technology Project of West China Hospital of Stomatology, Sichuan University(LCYJ-2023-YY-2);Correspondence: Xiong Xin, E-mail: drxiongxin@scu.edu.cn


Objective The aim of this study was to compare the anterior and posterior occlusal plane characteristics of patients with different temporomandibular joint osseous statuses. Methods A total of 306 patients with initial cone beam CT (CBCT) and cephalograms were included. They were divided into three groups on the basis of their temporomandibular joint osseous status: bilateral normal (BN) group, indeterminate for osteoarthrosis (I) group, and osteoarthrosis (OA) group. The anterior and posterior occlusal planes (AOP and POP) of the different groups were compared. Then, the regression equation was established after adjusting for confounding factors, and a correlation analysis between the occlusion planes and other parameters was performed. Results SNA, SNB, FMA, SN-MP, Ar-Go, and S-Go were correlated with the occlusal planes. Relative to the BN and I groups, the FH-OP of the OA group increased by 1.67° on the average, FH-POP increased by 1.42° on the average, and FH-AOP increased by 2.05° on the average. Conclusion The occlusal planes were steeper in the patients with temporomandibular osteoarthrosis than in the patients without it, and the mandible rotated downward and backward. The height of the mandibular ramus, the mandibular body length, and the posterior face height were small. In clinical practice, attention should be given to the potential risk of temporomandibular joint osteoarthrosis in such patients. In addition, SNB, FMA, SN-MP, Ar-Go, S-Go, and occlusal planes had moderate correlations.

Key words: temporomandibular joint osteoarthrosis, occlusal plane, cephalometrics, mandible, dentoskeletal morphology

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