What point represents the midpoint of the pituitary fossa?

The point that represents the midpoint of the pituitary fossa is the Sella (S). The Sella is a crucial landmark in cephalometric analysis, as it corresponds to the sella turcica, a saddle-shaped depression in the sphenoid bone that houses the pituitary gland. This midline point is essential for assessing the relationship between the cranial base and dental and facial structures, making it integral to orthodontic diagnosis and treatment planning.

The other options do not represent the midpoint of the pituitary fossa. Basion (Ba) is located at the anterior margin of the foramen magnum, Articulare (Ar) serves as the intersection of the ramus plane with the cranial base, and Gonion (Go) refers to the point on the contour of the mandible where the lower border of the ramus meets the curvature of the mandible. Thus, while these points have their distinct significance in craniofacial landmarks and cephalometric assessments, none serves as the midpoint for the pituitary fossa.