Orbital Roof Bone Anatomy

The lesser wing of the sphenoid bone forms the posterior aspect of the orbital roof.

Orbital roof bone anatomy.

Orbital roof the orbital roof consists of two bones. Superior orbital fissure lies between the lesser and the greater wing of sphenoid. It can be extremely thin frequently with dehiscent spots in elderly individuals. The roof superior wall is formed primarily by the orbital plate frontal bone and also the lesser wing of sphenoid near the apex of the orbit.

The largest contributor of the roof is the orbital part of the frontal bone while the small posterior portion is completed by the lesser wing of the sphenoid bone. The orbital surface presents medially by trochlear fovea and laterally by lacrimal. Orbital process of the frontal bone anterior superior portion lesser wing of the sphenoid postero medial portion inferior wall. It is mainly comprised of the horizontal orbital plate of the frontal bone.

Brow elevation lifts the roof. The roof is analogous to the soof except that it is located in the upper eyelid deep to the orbicularis oculi and above the orbital fat pads in a separate layer. Orbital process of the frontal bone orbital process of the zygomatic bone. The orbital roof which is the floor of the anterior cranial fossa consists of the frontal and lesser wing of sphenoid bones.

It is not a good idea to remove the roof figs. The orbit is open anteriorly where it is bound by the orbital septum which forms part of the eyelids. The superior bony margin of the orbital rim otherwise known as the orbital process is formed by the frontal bone. The only important landmark of this wall is the anterolaterally located depression called the lacrimal fossa intended for hosting the orbital part of the lacrimal gland.

Roof ptosis contributes to eyebrow ptosis in the aging face. Maxillary bone anterior inferior portion sphenoid bone. It is a thin lamina separating the orbit anteriorly from the frontal sinus and posteriorly from the anterior cranial fossa. The orbital roof is formed by two bones.

Roof of the orbit the superior wall is triangular and has a domed contour in the anterior orbital one third and the midorbit. It has a roof floor medial and lateral wall. This fissure allows the passage to the nerves iii iv vi branches of the v 1 and ophthalmic veins. The frontal bone contains the lacrimal gland fossa temporally and the trochlear fossa nasally.

The orbital roof is composed of the orbital plate of the frontal bone with a small contribution from the lesser wing of the sphenoid at the apex figures 3 4 and 3 5. 9 2 9 3 and 9 4. The orbital plate of the frontal bone forms the anterior aspect of the orbital roof.