Fig. 11

Superimposition on the anterior cranial base. Made by “The structural Method” developed by Professor Arne Björk. The stable anatomical structures of anterior cranial base are: • The inner contour of the anterior wall of Sella Turcica. • The mean intersection point of the lower contours of the anterior clinoid processes and the contour of the anterior wall of saddle, Walkers’s point. • The anterior contours of the middle cranial fossae. The contours of the bilateral fronto-ethmoidal crests. • The cerebral surfaces of the orbital roofs