ABSTRACT

The findings of this anatomic study will be helpfull in safety orbital decomp-ression.

In lateral orbital wall; mean distance between lateral orbital rim and middle cranial fossa was 24,39 mm. Mean distances between anterior point of frontozygomatic suture and anterior cranial fossa was 17,60 mm, between posterior point of frontozygomatic suture and anterior cranial fossa was 9,05 mm. In medial orbital wall; mean distances between posterior lacrimal crest and anterior ethmoidal foramina, posterior lacrimal crest and posterior ethmoi-dal foramina, posterior lacrimal crest and anterior wall of sphenoid sinus, posterior lacrimal crest and optic canal were 14,18 mm, 25.84 mm, 31.66 mm, 35,13 mm respectively. Mean distances between anterior ethmoidal foramina and maxilloethmoidal suture, posterior etmoidal foramina and maxilloethmoidal suture were 16,08 mm ve 13,01 mm respectively.

We studied on 10 adult skull and 2 cadaver. We measured distances between cranial fossa, optic canal, ethmoidal foramina and orbital rim, lacrimal crest, sutures and determined safety surgical margins.

Determination of safety medial and lateral orbital wall osteotomy margins for orbital decompression in the treatment of thyroid orbitopathy.