Orbital Roof Bones

Any or all of the seven orbital bones may be involved in an eye socket fracture.

Orbital roof bones.

The reason for this is that the bony walls are comminuted and or bone fragments are missing. Blowout fracture this refers to partial herniation of the orbital contents through one of its walls. Therefore one is reconstructing missing bone rather than reducing bone fragments. It usually occurs at the sutures joining the three bones of the orbital rim the maxilla zygomatic and frontal.

The lesser wing of the sphenoid bone forms the posterior aspect of the orbital roof. An orbital fracture is when there is a break in one of the bones surrounding the eyeball called the orbit or eye socket. It is our job as ophthalmologists to be able to readily identify these bones and know pretty much every bump notch hole and contour of these bones and what structures pass through travel along and attach to these bones. Usually this kind of injury is caused by blunt force trauma when something hits the eye very hard.

Any of the bones surrounding the eye can be fractured or broken. The orbital process of the frontal bone and the lesser wing of the sphenoid form the orbital roof. The floor inferior wall is formed by the orbital surface of maxilla the orbital surface of zygomatic bone. The superior wall or roof of the eye socket is formed by a part of the frontal bone or forehead.

The orbital surface presents medially by trochlear fovea and laterally by lacrimal fossa. Orbital roof fracture icd 801 01 etiology. The orbital plate of the frontal bone forms the anterior aspect of the orbital roof. The orbital roof is formed by two bones.

Most roof fractures are associated with other orbital fractures and result from significant head trauma as a high degree of force is required to fracture this portion of the orbit. There are 7 bones that comprise the orbit nbsp. There are many ways to remember these bones. The roof or superior wall of the orbit separates the orbit from the anterior cranial fossa.

Orbital rim fracture this is a fracture of the bones forming the outer rim of the bony orbit. Here are types of orbital fractures. Isolated orbital roof fractures in adults are uncommon comprising 12 19 of all orbital wall fractures. The majority of cases require reconstruction of the orbital roof to support the reduced bone fragments and restore the shape 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. Obviously rote memorization is pretty simple since there are only two bones.