Floor Of Orbit Orbitale

The key areas of the orbit involve mainly the posterior orbital floor and medial orbital wall which bulge towards the orbit resulting in an s shape of the orbital floor in the posterior third seen in a sagittal view along the axis of the optic nerve.

Floor of orbit orbitale.

Fractures of the orbital floor are common. It is estimated that about 10 of all facial fractures are isolated orbital wall fractures the majority of these being the orbital floor and that 30 40 of all facial fractures involve the orbit. Getting hit with a baseball or a fist often causes a orbital blowout fracture. The anatomy of the orbital floor predisposes it to fracture.

The globe usually does not rupture and the resultant force is transmitted throughout the orbit causing a fracture of the orbital floor. The medial wall is formed primarily by the orbital plate of ethmoid as well as contributions from the frontal process of maxilla the lacrimal bone and a small part of the body of the sphenoid. During my training under norman shorr md at the jules stein eye institute ucla i observed frequent use of orbital steroid injections to treat orbital inflammatory disease including graves and i also learned about steroid injections from william stewart md. A blow out fracture pure is a fracture of internal orbital walls without fractures of orbital rims.

When we refer to an orbital floor fracture in this text a blow out fracture is meant. The floor is likely to collapse because the bones of the roof and lateral walls are robust. Orbital steroid injections for graves orbitopathy and other inflammatory disease of the orbit have had a somewhat chequered past. According to this theory the contents of the orbit are compressed posteriorly toward the apex of the orbit and the orbital bones break at their weakest point usually the posterior medial part of the floor in the maxillary bone.

The floor is separated from the lateral wall by inferior orbital fissure which connects the orbit to pterygopalatine and infratemporal fossa. Orbital floor fractures can present as blow out fractures or in combination with a zygoma or le fort fractures. An orbital blowout fracture is a traumatic deformity of the orbital floor or medial wall typically resulting from impact of a blunt object larger than the orbital aperture or eye socket most commonly the inferior orbital wall i e. Orbital floor fracture also known as blowout fracture of the orbit eye socket.