Positional changes after mandibular advancement by sagittal split osteotomies and wire osteosynthesis. Do combined orthodontics and the Dal Pont modification of the buccal osteotomy contribute to long-term stability?

摘要: Thirty-five cases of sagittal split ramus osteotomies with wire osteosynthesis as the exclusive procedure used to correct a dentoskeletal Class II deformity, were selected form homogeneous group for cephalometric evaluation short- and long-term, skeletal dental changes. The was statistically described having severe micromandibulism, mild micromaxillism dento-alveolar maxillary protrusion. relapse within first postoperative year due horizontal dorsocranial rotational changes tooth-bearing segment. joint-bearing segment rotated ventrocranially. As an overall result, mandibular body not lengthened but advanced. at occlusal level considerably less, partly component mechanism, compensating retroclination upper anterior teeth. With condyles correctly repositioned surgery, no relationship could be found between in condylar position relapse. There difference average amount subgroup Dal Pont modification buccal osteotomy directed angle. greater combined surgical orthodontic cases, increased alveolar tooth mobility.