Abstract
To examine the thickness of the orbital septum in comparison to that of the periorbita and the periosteum of the frontal bone. Histological evaluation of 11 tissues around the upper arcus marginalis, including the orbital septum, periorbita, and periosteum of the frontal bone (5 right, 6 left) from 11 Japanese cadavers (age range: 63-91-year-old, average: 77.1, male: 5 cases and female: 6 cases) was performed. The specimens were fixed in 10% formalin and stained with Masson's trichrome. The thickness was measured at the 2 mm points from the center of the merging area of these 3 tissues (arcus marginalis). Statistical analyses in 3 groups were performed first with a one-way ANOVA and then with Tukey's multiple comparison test. Differences in ages or sexes were compared with the Mann-Whitney U test. The significance level was set at 0.05. The orbital septum showed similar thickness with the periosteum of the frontal bone ( p = 0.784), but was thicker than the periorbita ( p = 0.021). The periosteum of the frontal bone was found to be thicker than the periorbita ( p = 0.004). Differences between ages ( p = 0.315) or sexes ( p = 0.126) did not show statistical significance. The thickness of the orbital septum was similar to the periosteum of the frontal bone, but was thicker than the periorbita at the 2 mm points from the center of the arcus marginalis. These showed some variation in each case, though. Ages or sexes did not influence the septum thickness after 60 years of age.
Published Version
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