China Journal of Oral and Maxillofacial Surgery ›› 2020, Vol. 18 ›› Issue (1): 33-37.doi: 10.19438/j.cjoms.2020.01.006

• Original Articles • Previous Articles     Next Articles

Changes of temporomandibular joint space and condylar position in adolescents after arthroscopic disc repositioning surgery

ZHAN Yi-ning, HU Ying-kai, MA Zhi-gui, YANG Chi   

  1. Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Disease; Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology. Shanghai 200011, China
  • Received:2019-04-28 Online:2020-01-20 Published:2020-03-09

Abstract: PURPOSE: To compare the change of joint space and condylar position pre- and post-arthroscopic disc repositioning, and to investigate the influential factors as well as to provide useful information for surgical planning. METHODS: One hundred and thirty seven joints in 88 patients with anterior disc displacement treated with arthroscopic disc repositioning were included from January to December 2016. The widths of joint space in patients post-surgery were compared with those before surgery according to the follow-up results. Student's t test, Chi-square test and generalized additive models were used to assess the changes of joint spaces and condylar position with SPSS 17.0 and Empowerstats software package. RESULTS: The mean age at first visit was (16.40±2.14) years. The mean follow-up interval was (7.96±4.15) months. The average anterior space one week after surgery was (2.62±0.86)mm, (4.42±1.01)mm for the superior space, and (4.75±1.25)mm for the posterior space. The superior and posterior space increased significantly 1 week after arthroscopy, while the anterior space decreased significantly(P<0.05). The dominant condylar position changed from the centric(49.6%) to the anterior position(77.4%) postoperatively. Further more, the longer the follow-up time was, the more posterior the condylar position became. CONCLUSIONS: The superior space and posterior space increased significantly 1 week after arthroscopic surgery, and decreased as the following-up period got longer, but still with significant difference.

Key words: Temporomandibular joint, Joint space, Condylar position, Arthroscopic disc repositioning, MRI

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