Morphometric Study on Histologic Components of the Spleen / 대한해부학회지

The partial splenectomy was performed on the basis of the arterial distribution in order to reduce complications. The spleen consists of the various histologic components that have different functions. But we can not find the reports whether the distribution of red pulp, white pulp and trabecula is uniform or not according to the regions of the spleen. We used 15 spleens from Korean[male 8, female 7 and age 17-74]. The volume was measured with the mass cylinder. The 1cm3 blocks were selected in 5 different regions. Whole splenic slices by celloidin embedding were made from two spleens. The point counting method with eyepeice reticule was used for the measurement of the distribution of red pulp, white pulp and trabecula. The results were as follows : 1. The volume of the spleen was ranged 45-158ml and the individual difference was marked. The male spleen was larger than female`s [p<0.05]. 2. The ratio of red pulp, white pulp and trabecula of the paraffin embedding preparations was 83.2, 10.9, and 5.9% respectively. There was no significant difference in the distribution of the histologic components among five regions[upper, hilum, middle, outer, and lower]. 3. The distribution of red and white pulps in whole splenic slices was not uniformity. The ratio of red pulp, white pulp and trabecula in whole splenic slices was 80.1, 13.4 and 6.5% respectively. These results showed no significant difference with those of five regions of the spleen.

The Morphology of the Mandibular Canal in Korean / 대한해부학회지

Ninety-three dry mandibles in Korean adults were radiographed and fifty-two hemimandibles were sectioned in an attempt to analyze the intramandibular courses of the mandibular canal and the internal structure of the mandibles. On radiographs, the intramandibular course of the mandibular canals was most in which located in the middle portion of the mandible, the shape of the mandibular canals was almost round and the average diameter of the mandibular canals was 2.0 +/- 0.4mm, encapsulated by thin cortical plates of 0.5mm thickness on sectioned specimens. In regard of facio-lingual relation, the prevalence of pattern which the mandibular canal ran nearly to the lingual cortical plate, and turned abruptly towards the buccal side was 70% of observed specimens. According to superior-inferior relation, the prevalence in which mandibular canals ran inferiorly, anteriorly and then, had an angle superiorly in the second mandibular molar region was 39.0%. Taken all together, in most of the case, the anterior border of the mandibular canal is located around the premolar region, and the mental foramen is opened nearly the second premolar. Therefore, it may be suggested that osteotomy has to be taken at the anterior place next to the canine region, at the 2.4mm below to the mental foramen on genioplasty.