The Clinical Study Of Rigid Internal Fixation On Mandibular Fractures

Objects: To explore the application of rigid internal fixation on mandibular fractures, and thus provide the theoretical foundation and clinical guidance for the rigid internal fixation on mandibular fractures.Methods: 139 patients with mandibular fractures treated by rigid internal fixation with mini titamium plates were chosen from the patients treated in the Department of Oral and Maxillofacial surgery, Tianjin Medical University General Hospital from 1991 to 2003. The group of patients were analyzed according to age, gender, cause of injury, position of fracture, accompanying systemic injuries, operative approach, setting of titanium plate, inter maxillary fixation, occluding relation after surgery, complication after surgery and so on. Then, the data were input into Excel database, and displayed by statistic chart. We analyzed the data and then discussed as follows.Results: Among the 172 fractures happened in the 139 patients, 51.74% was symphysis fractures, which was the most popular fracture, and the most of associated systemic injuries was midface fracture. Among this group of patients, extraoral approach was used most extensively at a rate of 76.74% in total incisions. There was significant difference in operative approach between the group of simple fractures and the complicated ones (p<0.05) . There was significant difference in the amount of titanium plates using between the group of 1991-1998 and that of 1999-2003(p<0.05).In this group, 58 patients were treated by inter maxillary fixation after rigid internal fixation , the rate was 41.73%.There was significant difference in the rate of inter maxillary fixation between the group of simple fractures and the complicated ones, between the group of fresh fractures and the staled ones (p<0.05) . By the first day after rigid internal fixation, there was significant difference in occluding relation between the group of simple fractures and the complicated ones, between the group of accompanying midface fractures and that of non-accompanying midface fractures (p<0.05) . By the fourth week after operation, there was significant difference between the group of fresh fractures and staled ones (p<0.05) .