[Treatment of occlusal disorder caused by old mid-facial fracture].

To investigate the treatment results of occlusal disorder caused by old mid-facial fracture. A total of 299 patients aged 26-51 years were enrolled in this study. All cases experienced a delay of treatment over 4 weeks after injury. The old mid-facial fracture was scanned by spiral CT and model surgery conducted. Ostectomy and rigid internal fixation were performed. The wound was healed by first intention without infection and other complications. After 1-24 months of follow-up, 299 patients achieved well-shaped mid-face and the occlusion was recovered with mouth opening of over 2 cm. Model surgery combined with ostectomy and rigid internal fixation can achieve satisfied treatment results in patients with old mid-facial fractures.