Half Of Orbital Floor

Once the orbital floor defect has been exposed herniated muscle and fat are gently disimpacted back into the orbit.

Half of orbital floor.

The globe usually does not rupture and the resultant force is transmitted throughout the orbit causing a fracture of the orbital floor. The inferior orbital neurovascular bundle comprising the infraorbital nerve and artery courses within the bony floor of the orbit. A retrospective comparative case series of all orbital floor fracture repair cases 158 eyes from 1983 to 1998 was done. Bone grafts were chosen for large defects comminuted fractures or if other reconstruction eg sinus was required.

Synthetic prostheses were tailored to the orbital floor in clinically significant fractures. Relative indications for surgery are high risk fractures for enophthalmos which involve over one half of the orbital floor or lateral orbital wall. The anatomy of the orbital floor predisposes it to fracture. Signs and symptoms can be quite varied ranging from asymptomatic with.

The fracture area will be maximal when an injuring agent is moving upward at an angle of 30 to the infraorbital rim fig. A 1 5 cm wide fracture involving half the typical orbital floor with 2 cm in depth typical of the maxillary sinus and 1 cm displacement potentially creates volumetric expansion of 1 5 x 2 x 1 3 cm 3 presenting concern about postoperative enophthalmos. The entire extent of the defect should be explored. Orbital floor fractures may result when a blunt object which is of equal or greater diameter than the orbital aperture strikes the eye.

Orbital fractures of this size have a high incidence of subsequent significant enophthalmos. After vacuming i took a good look at the floor and was happy to see most of the grey gone and not much in the way of sanding marks. I was finished with that machine so i started up my porter cable 1 2 sheet sander and with 80 grit floor sanding paper attacked the edges where the orbital floor machine couldn t get. The roof of this infraorbital canal is only 0 23mm thick and the bone of the posterior medial orbital floor averages 0 37 mm thick.

Various materials have been used to reconstruct orbital wall defects including silastic supramid silicone sheets teflon marlex mesh gortex and gelfilm. Use an observation with possible intervention within 1 to 2 weeks in all other cases of confirmed orbital floor fractures. Large fractures involving at least half of the orbital floor particularly when associated with large medial wall fractures determined by ct. The floor is likely to collapse because the bones of the roof and lateral walls are robust.