Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University, Republic of Korea.
Department of Orthodontics, School of Dentistry, Dental Science Research Institute, Chonnam National University, Republic of Korea.
J Craniomaxillofac Surg. 2021 Jan;49(1):9-16. doi: 10.1016/j.jcms.2020.11.001. Epub 2020 Nov 7.
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.
本研究旨在评估髁突后移位（PCD）与关节窝深度之间的关系。共研究了 29 例接受 CT 扫描的患者，分别在术前（T0）、术后即刻（T1）和术后 6 个月（T2）进行。使用三维分析软件测量关节窝深度，并在 T0、T1 和 T2 时对 CT 上的移位髁突中心和轴进行评估。通过 Pearson 相关分析研究 PCD 和关节窝深度之间的关系。关节窝深度从 3.9mm 到 12.0mm 不等，平均值为 8.15±1.60mm。与 T0 相比，T1 时髁突中心移位 1.12±0.66mm。髁突中心的移位量与关节窝深度呈负相关（r=-0.424，p=0.001）。T0 至 T2 之间髁突中心的移位量为 0.85±0.51mm。T0 至 T1 之间髁突中心的移位量与 T0 至 T2 之间的移位量呈正相关（r=0.481，p<0.001）。总之，在 SSRO 后髁突重新定位和术后管理中，对于关节窝深度较小的患者需要更加注意，以最小化并发症的发生。
