Anterior relapse or posterior drift after intraoral vertical ramus osteotomy.

摘要: This study aimed to evaluate the factors contributing postoperative anterior relapse or posterior drift of distal segment after intraoral vertical ramus osteotomy. A retrospective cohort was conducted which included 31 patients who underwent setback surgery for mandibular prognathism by osteotomy technique. Uni- and multivariate analyses were performed determine association potential explanatory variables (sex, age, magnitude setback, differences in between sides (right/left), duration splint use, Angle’s classification malocclusion, angle, tightness occlusion molars) with positional changes segment. The only significant factor affecting (P = 0.015) drift, magnitudes less than 7.25 mm. Posterior is likely if exceeds For setbacks 7.25 mm, should either be carefully corrected postoperatively, an alternative surgical technique used. showed a risk following osteotomy, determined cut-off value may serve as predictor outcomes.