顔面神経管の走向に関するレ線学的検討
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概要
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A radiographic survey was performed on 50 temporal bones of 25 skulls in order to study the relationship of the facial canal to the tympanomastoid fissure.A fine metal wire was glued on the tympanomastoid fissure and the facial canal was filled with a few wires, then the specimens were examined in antero-posterior and lateral projections.The horizontal distances between the facial canal and the tympanomastoid fissure were measured at four points, that is, 5 mm, 10 mm, 15 mm from "pointer" along the tympanomastoid fissure, and "pointer" itself.The results are as follows:The means of the distances were 0.44 mm, 0.06 mm, 0.46 mm and 2.02 mm, respectively, posterior to the tympanomastoid fissure at "pointer", 5 mm, 10 mm and 15 mm on the right side, and 0.66 mm, 0.22 mm, 0.78 mm and 2.34 mm at each point on left side.The means of the depth were 8.52 mm, 10.71 mm, 11.49 mm and 10.07 mm medial to the tympanomastoid fissure at each point on the right side and 8.34 mm, 10.83 mm, 11.55 mm, 10.16 mm on the left side. These numerals did not indicate the horizontal distances between the center of the facial canal and the tympanomastoid fissure, but the distances between the proximal mark of the facial canal and the tympanomastoid fissure.The standard deviation was the smallest at the point of 10 mm, and the next smallest at the point of 5 mm.From the facts above mentioned, it can be concluded that the distance variation between the facial canal and the tympanomastoid fissure was tympanomastoid fissure was the smallest in the range of 5-10 mm from the "pointer", and in such a range, the facial canal could be detected between 2 mm anterior and 3 mm posterior to the tympanomastoid fissure at the depth of around 8-13 mm.
- 社団法人 日本耳鼻咽喉科学会の論文