Abstract: PURPOSE: To explore the value of CBCT in the diagnosis and treatment of sagittal condylar fractures, and to evaluate the application of computer-aided design in open reduction and internal fixation of condylar sagittal fractures. METHODS: A total of 21 patients with condylar sagittal fracture who were treated in the Third Hospital of Hebei Medical University from March 2022 to October 2023 were selected as the study objects. All patients were examined by CBCT before surgery and underwent 3D reconstruction and computer-aided design using Mimics software. Through the analysis of preoperative imaging data, the fracture type, displacement and fixation plan were determined. The reduction outcomes and prognosis were evaluated by imaging and clinical examinations. RESULTS: Intraoperative diagnosis of all patients was consistent with preoperative CBCT imaging diagnosis. Postoperative imaging results showed that the actual length, implant position and angle of the internal fixation were basically consistent with the preoperative design, and 19 patients achieved or approached anatomical reduction. At 3 months after surgery, the maximum opening of the patients was significantly improved compared with that before surgery, and imaging evaluation showed that 12 patients achieved grade 1 healing and 7 patients achieved grade 2 healing. CONCLUSIONS: CBCT provides an effective reference for clinical diagnosis and treatment of sagittal fracture of condyle. The combination of preoperative CBCT and computer-aided design is helpful to guide the surgical treatment of sagittal fracture of condyle and has high clinical value.

Key words: Sagittal fracture of the mandibular condyle, Open reduction and internal fixation, CBCT, Computer-assisted design