Sphenoid bone is more important structure of skull base surgery.
In our concept, however, we tilt the abutments of the distal implants in both jaws into mesial direction, utilizing the pterygoid plate of the
sphenoid bone (In the upper jaw) and the lingual cortical undercut of the distal mandible are target (2nd/3rd) corticals.
(1) The pituitary gland is located at the base of the brain in the sella turcica (pituitary fossa) of the
sphenoid bone. (2) In inferior view of the brain, both the circle of Willis and the pituitary gland structures can be seen.
Later, cases of GCRG were reported to originate from
sphenoid bone, ethmoid bone, skull base, temporal bone, craniofacial bone, short bones of the hand and feet, and long bones of the extremities.
There were also bony and dural changes along the anterior skull base with erosion of the sella turcica and lateral
sphenoid bone toward the cavernous sinus (Figure 1).
Maxillary lesions may expand to maxillary sinus, zygoma,
sphenoid bone and floor of the orbit.
To eliminate possible imaging errors when measuring hard palate angulation, a line was drawn in the same section between the lesser wings of the
sphenoid bone participating in the structure of the orbit on both sides (Figure 2A).
The tumor was found to be invading the infratemporal fossa, extending anteriorly up to the temporomandibular joint and inferiorly up to the greater wing of the
sphenoid bone. A drain was left in the large dead space created by the removal of the tumor.
The malar eminence is approximately the central portion of the ZMC.4 bony attachments to the skull are evident from the center of the zygomatic bone, namely, a superior attachment to the frontal bone (frontal process of the zygomatic bone), a medial attachment to the maxilla (maxillary process or buttress of the zygomatic bone), a lateral attachment to the temporal bone (temporal process of the zygomatic bone) and a deep attachment to the greater wing of the
sphenoid bone (sphenoidal process of the zygomatic bone).13 Using this definition, ZMC fractures are called tripod fractures.
Initially, head and paranasal sinuses CT scan was performed and revealed a large, isodense, well-defined, expansive space-occupying lesion in a midline location, centered in the body of the
sphenoid bone and extended to posterior ethmoid cells.
Being superiorly bounded by the
sphenoid bone, the infections of the infratemporal space may spread to the cavernous sinus through the pterygoid plexus or to the orbit due to a path through the ophthalmic veins (10).
These veins create a cavity bordered by the temporal bone of the skull and the
sphenoid bone in the head.
sphenoid bone - butterfly-shaped bone at the base of the skull