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. Orbital floor fracture also known as blowout fracture of the orbit eye socket. Fractures of the orbital floor are common. 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 orbital contents prolapse through the fracture into the maxillary sinus and may be entrapped. Orbital floor fractures may result when a blunt object which is of equal or greater diameter than the orbital aperture strikes the eye. 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. The globe usually does not rupture and the resultant force is transmitted throughout the orbit causing a fracture of the orbital floor.

Orbital floor fractures can present as blow out fractures or in combination with a zygoma or le fort fractures. A blow out fracture pure is a fracture of internal orbital walls without fractures of orbital rims. Orbital floor fractures may result when a blunt object which is of equal or greater diameter than the orbital aperture strikes the eye or on the cheek 1. 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.

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 likely to collapse because the bones of the roof and lateral walls are robust. When we refer to an orbital floor fracture in this text a blow out fracture is meant. The floor is separated from the lateral wall by inferior orbital fissure which connects the orbit to pterygopalatine and infratemporal fossa.