RELATION BETWEEN CRANIAL BASE FLEXURE AND POSITION OF THE JAWS

Col relation between the cranial base flexure with th:e sagital and ve rtical positions of both jaws has been analysed on 180 radiographs of eugnathic probands and 256 radiographs of patients with various malocc lusion forms. Radiographs were analysed by conventional cephalometric procedures determining maxillar rotation, mandibular rotation, sagitta l position of the maxilla, sagittal position of the mandible, and cran ial base flexure. A significant correlation between the degree of cran ial base flexure and facial prognathism teas found. The correlation co efficients,,were higher in eugnathic probands than in, those with malo cclusions. Regression analysis defined three basic types of sagittal b imaxillar relations: orthognatism, retrognatism and prognatism.