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Comparison of condylar displacement after sagittal split ramus osteotomy depending on the glenoid fossa depth.

  • Yu, Kang Hee1
  • Lim, Hoi-Jeong2
  • Kim, Soung-Min1
  • Hwang, Soon Jung3
  • 1 Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University, Republic of Korea. , (North Korea)
  • 2 Department of Orthodontics, School of Dentistry, Dental Science Research Institute, Chonnam National University, Republic of Korea. , (North Korea)
  • 3 Dental Research Institute, Seoul National University, Republic of Korea; HSJ Dental Clinic for Oral and Maxillofacial Surgery, Republic of Korea. Electronic address: [email protected] , (North Korea)
Published Article
Journal of cranio-maxillo-facial surgery : official publication of the European Association for Cranio-Maxillo-Facial Surgery
Publication Date
Nov 07, 2020
DOI: 10.1016/j.jcms.2020.11.001
PMID: 33229066


This study aimed to evaluate the relationship between postoperative condylar displacement (PCD) after sagittal split ramus osteotomy (SSRO) and the glenoid fossa depth. A total of 29 patients who underwent computed tomography (CT) before surgery (T0), immediately after (T1), and 6 months after (T2) surgery were studied. The fossa depth was measured, and the amount of displaced condylar center and axis were evaluated on CT at T0, T1, and T2 using three-dimensional analysis software. PCD and the fossa depth relationship was investigated by Pearson's correlation analysis. The fossa depth varied from 3.9 mm to 12.0 mm, and the mean value was 8.15 ± 1.60 mm. The condylar center was displaced by 1.12 ± 0.66 mm at T1 compared with it at T0. The amount of displaced condylar center negatively correlated with the fossa depth (r = -0.424, p = 0.001). The displacement of the condylar center between T0 and T2 was 0.85 ± 0.51 mm. The amount of condylar center displacement between T0 and T1 showed a positive correlation with it between T0 and T2 (r = 0.481, p < 0.001). In conclusion, more attention is needed in patients with small fossa depth during condylar repositioning after SSRO and postoperative management to minimize complications. Copyright © 2020 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

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