Stabilität des Unterkiefers nach hoher sagittaler supraforaminaler Osteotomie. Röntgenkephalometrische Untersuchung

AIM OF THE STUDY: The aim of this study was to investigate the stability achieved with high sagittal supraforaminal osteotomy (HSSO) for setback and advancement procedures of the mandibular ramus.

MATERIAL AND METHODS: Computerized cephalometric X-rays of 102 patients, taken at four different times during treatment, were evaluated.

RESULTS: The mean postoperative relapse was 20%, depending on the extent of the surgical correction (correlation coefficient: -0.68). Mandibular setback gave more stability than mandibular advancement. The type of osteosynthesis (positional screw combined with miniplate osteosynthesis or intermaxillary fixation) did not influence the stability. Unimaxillary osteotomies were more stable than bimaxillary procedures (p < 0.001).