EFFICACY OF EXTRAORAL VERTICAL RAMUS OSTEOTOMY IN COMBINATION WITH INTERNAL FIXATION IN THE TREATMENT OF MANDIBULAR PROGNATHISM
Keywords
Performed preoperatively
and at six months
and 18 months postoperatively
Abstract
Extraoral vertical ramus osteotomy (EVRO) is used in orthognathic surgery for the treatment of mandibular deformities. Originally, EVRO required postoperative intermaxillary fixation (IMF). EVRO has been developed using rigid fixation, omitting postoperative IMF. We examined retrospectively the long-term stability and postoperative complications for patients with mandibular prognathism who underwent EVRO with internal rigid fixation. Patients who were treated with EVRO for a mandibular prognathism in the period 2022–2023 at the Department of Plastic Surgery of the multidisciplinary clinic of the Tashkent Medical Academy (N = 12). Overjet and overbite were calculated digitally and cephalometric analyses were performed preoperatively, and at six months, and 18 months postoperatively. There was a general setback of the mandible, decreased gonial angle and reduced degree of skeletal opening. Excellent dental and vertical skeletal stabilities were seen up to 18 months postoperatively, although relapse was seen sagitally up to six months postoperatively. Since the overjet did not show any significant change over time, the sagittal skeletal changes have been attributed to dental compensation. There was no permanent damage to the facial nerve and 8.3% neurosensory damage to the inferior alveolar nerve was observed.
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