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  • Title: Mandibular angle fractures: two-miniplate fixation and complications.
    Author: Fox AJ, Kellman RM.
    Journal: Arch Facial Plast Surg; 2003; 5(6):464-9. PubMed ID: 14623682.
    Abstract:
    BACKGROUND: Noncompression monocortical miniplate fixation of the mandibular angle is an accepted and reliable method for providing rigid internal fixation. High complication rates have been reported for internal fixation of angle fractures. OBJECTIVE: To analyze the outcome and complications in cases in which patients were treated with 2-miniplate fixation at the mandibular angle. DESIGN: A retrospective analysis of outcomes for a case series. SETTING: Treatment performed at a level 1 trauma-rated teaching hospital. METHODS: From May 1992 to September 2001, a total of 88 patients with angle fractures of the mandible were treated with 2-miniplate fixation. Sixty-eight of the 88 patients, with 70 angle fractures, were included in the study; 13 were unavailable for follow-up and 7 had less than the minimum follow-up of 6 weeks. The time of trauma to treatment, cause of injury, and associated fractures were recorded. Postoperative complications, including infection, malunion, nonunion, dehiscence, osteomyelitis, and nerve injury due to surgical manipulation, were tabulated. Follow-up examinations were performed up to 12 weeks after surgery, with additional examinations if necessary. Postreduction panoramic radiographs were obtained in most cases. RESULTS: No patients treated with monocortical 2-miniplate fixation had malunion, nonunion, or osteomyelitis. Twelve (17.6%) of the 68 patients were identified as having at least 1 postoperative complication. Postoperative infection occurred in 2 patients (2.9%). Infection was controlled with oral antibiotic therapy. One patient required removal of miniplates after the acute phase resolved. Occlusal disturbances were noted in 4 patients (5.9%) (2 with a slight anterior open bite, 1 with a crossbite, and 1 with premature contact of a molar) after surgery. Three of the 4 patients had associated midfacial or multiple mandibular fractures. None required further surgery. Wound dehiscence, with exposure of an underlying plate, occurred in 4 patients (5.9%); the wounds were treated conservatively and subsequently resolved. Nerve injury due to surgical manipulation occurred in 3 patients (4.4%). CONCLUSIONS: Monocortical 2-miniplate fixation of the mandibular angle is a reliable and effective technique for providing rigid fixation. The complications were minimal in our study, and the infection rate was 2.9%, which is comparable to or better than the infection rate reported with the use of a single miniplate fixation technique in other studies. Disturbances of occlusion were associated with midfacial or additional mandibular fractures. In view of the contradictory published results, further studies are needed to determine the ideal approach for noncompression monocortical plate fixation of angle fractures.
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