Frontal sinus posterior wall
The frontal sinus has a thick strong anterior wall, a thin fragile floor, and a posterior wall. Its floor is the roof of the orbit. Its posterior wall forms the anteroinferior portion of the anterior wall of the anterior cranial fossa.
The posterior wall of the frontal sinus is part of the sinus that is closest to the brain.
The posterior wall of the frontal sinus is an important landmark for surgical procedures that involve the frontal sinus, such as endoscopic sinus surgery. Surgeons must be careful not to breach this wall during surgery, as doing so could cause injury to the brain or other important structures.
Additionally, the thickness of the posterior wall of the frontal sinus varies among individuals, and this can impact the difficulty of surgical procedures involving the frontal sinus. Imaging studies, such as computed tomography (CT) scans, can be used to assess the thickness and shape of the posterior wall of the frontal sinus prior to surgery.