J Korean Ophthalmol Soc.  2011 Aug;52(8):964-969. 10.3341/jkos.2011.52.8.964.

Surgical Anatomy of Deep Lateral Wall by Adults Cadavers and Computed Tomography

• Oh DH
• Lee JK

• KMID: 2214774
• DOI: http://doi.org/10.3341/jkos.2011.52.8.964

Abstract

PURPOSE
We investigated the surgical anatomy of the deep lateral orbital wall via dissection of Korean cadavers and analysis of the orbit in normal adults using computed tomography.
METHODS
Twelve cadavers were used to determine the exact anatomic index of the orbital lateral wall, and computed tomography images of 20 patients were used for surgical anatomic measurements during deep lateral orbital wall decompression. Additionally, the anatomic indexes measured in the cadavers and in the computed tomography study were compared and analyzed.
RESULTS
In the cadaver study, the mean distance from the orbital rim to the end of the superior orbital fissure was 36.7 +/- 1.98 mm, to the rim of the frontosphendoial suture was 18.2 +/- 1.92 mm, and from the end of the superior orbital fissure to the inferior orbital fissure was 17.1 +/- 1.19 mm. In the computed tomography study, the mean value from the orbital rim to the end of the superior orbital fissure was 39.2 +/- 2.46 mm, and from the rim to the frontosphenoidal suture was 17.8 +/- 1.56 mm.
CONCLUSIONS
The present study regarding the surgical index of the lateral orbital wall in Koreans will assist surgeons to safely and confidently perform deep lateral orbital wall decompression.

Keyword

Cadaver; Computed tomography; Deep lateral orbital wall; Thyroid orbitopathy

MeSH Terms

Adult
Cadaver
Decompression
Humans
Orbit
Sutures

Figure

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  Figure 1. Right orbit. (A) Measuring the distance between the end of superior orbital fissure and the lateral orbit rim. (B) Measuring the distance between the end of inferior orbital fissure and lateral orbit rim.

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  Figure 2. The measurement of 5 surgical index of distance for deep lateral wall decompression in lateral orbit wall of cadavers. SOF = superior orbital fissure; FZS = frontozygomaticsuture; ZSS = zygomaticosphnoidal suture; GWS = greater wing of sphe-noid; IOF = inferior orbital fissure; ZFF = zygomaticofacial foramen; SOFD = superior orbital fissure distance; FSSD = frontosphenoidal suture distance; OFD = orbital fissure distance; IOFD = inferior orbital fissure distance; IFD = interfissure distance.

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  Figure 3. The measurement of 4 surgical indexes for deep lateral wall decompression in orbital computed tomography. (A) The measurement of 3 surgical indexes in axial view of computed tomography. (B) The measurement of removal volume (arrow) of deep lateral wall decompression (GWSV) in axial view of computed tomography. GWST = greater wing of sphenoid thickness; GWSV = greater wing of sphenoid volume.

Reference

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