RESUMO
The rationale for the surgical correction of skeletal anterior open-bite deformities by bilateral mandibular rotation osteotomy is presented. Results of this procedure in which rigid internal fixation is used are reported and show a very high degree of long-term stability. The procedure offers a useful alternative to the more common approach of posterior maxillary intrusion, which does not always address the cosmetic defect.
Assuntos
Má Oclusão/cirurgia , Mandíbula/cirurgia , Osteotomia/métodos , Placas Ósseas , Parafusos Ósseos , Transplante Ósseo , Cefalometria , Humanos , Imobilização , Masculino , Má Oclusão/patologia , Mandíbula/patologiaRESUMO
Forty-three patients who underwent surgical lengthening of the mandible using an inverted L osteotomy, bone grafting, and rigid internal fixation between the mandibular segments were evaluated by retrospective cephalometric analysis for longitudinal skeletal and dental changes. Postoperative response (means = 1 year 9 months) was found to demonstrate a high level of stability with some individual variability. No propensity for relapse was observed in any postoperative time interval. Condylar repositioning postoperatively appeared to be an important factor in those patients who exhibited any relapse tendency. Overall postoperative stability of this surgical/fixation technique appears to be significantly improved compared with previously documented techniques.
