The Change of the Transverse Dimension and the Postoperative Stability of Intraoral Vertical Ramus Osteotomy.
Abstract
Objectives : To study the transverse dimension change , the postoperative stability and the postoperative complications of intraoral vertical ramus osteotomy.
Materials and Methods: The patients who underwent intraoral vertical ramus osteotomy at the Department of Oral and Maxillofacial Surgery in Chonburi Hospital between 2014 and 2022 were selected. Data were collected from the patients' charts, and radiographic images, and analyzed through statistical and cephalometric analysis. Descriptive analysis, Fisher's exact test, and the paired sample t-test were used.
Results: Fifty-five patients (15 males and 40 females) with a mean age of 26.98 years (ranging from 17 to 41 years) were included in the study. Twelve patients were selected for facial width analysis. The preoperative facial width was 93.1±6.95 millimeters. The difference in facial width between preoperative and one year postoperative was 1.95±5.75 millimeters , between preoperative and two years postoperative was 2.37±3.51 millimeters, and there was no statistically significant difference (P < 0.05). Thirteen patients were selected for postoperative stability analysis. The difference in lower incisal position between one month and one year postoperatively was -0.35±2.03 millimeters , between one month and two years postoperatively was 0.55±0.68 millimeters, and No statistically significant difference was found (P<0.05). Of the 109 rami studied, altered sensation of the lower lip and chin was reported in 21.9% (23/105 rami) for less than one year, and 4.76% (5/105 rami) for one year or more. Condylar luxation was reported in one of the 109 rami (0.92%).
Conclusion : The study concluded that the procedure had a low incidence of complications, produced stable results, and did not increase facial width.
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