A CASE OF THE DENTINAL TUBULES OF ENORMOUS SIZE AND CAPILLARIES FOUND IN HUMAN TOOTH

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概要

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• The size of ordinary dentinal tubules is in the range from 1.0 to 4.0 microns in diameter, except for those dentinal tubules of 5.0 micron^<6)> found occasionall in the crown part of molars. So far dentinal tubules over 6.0 micron in diameter have not been reported. On the other hand, with regard to occurrence of capillaries of dentine, it is well known that are present in secondary dentine in calcified state, and in certain species of fish they occur as the vasodentine serving as nutritive channels. The present authors found unexpectedly in the crown dentine of a third molar (horizontal semi-impacted) occurrence of dentinal tudules of enormous size and capillaries, which were thought to represent considerable deviation from the normal. The fin ling are as follows. A material tooth was decalcified with Plank and Rychlo's^<7)> mixture consisting of 2.0 g. of AlCl, 8.5 ml of HCl, 5.0 ml of formic acid, and distilled water to a total of 100 ml. Following the routine procedure, the tooth were embedded in celloidin, and serial cross-section from 10 to 15 microns were prepared, and these were stained with hematoxylin-eosin, Gomori's silver methods. As shown in Diagram, in the crown portion of dentine (canopy dentine), there were found the tubules of enormous size approximately 8.0 to 12.5 microns in diameter sparsely distributed. These abnormal forms were not seen throughout the entire length of the dentinal tubules, but they were only local enlargement of the tubules occurring in the middle layer of crown dentine, and in the range from 100 to 300 microns in length. The dentinal fibers in the tubules shrinked considerably. On the other hand, there were in the vicinity of the tubules also capillaries, approximately 10 to 16 microns in diameter, a part of which still showing vascular appearance, and another part calcified, and still another showing rudimentary appearance. Also, the capillaries dwindled progressively toward the pulpal direction, and no connection thereto was observed.

• 九州歯科学会の論文
• 1966-03-31

著者

• Saegusa Hiroshi

  Dept. Of Oral-histology Kyushu Dental College

• Shimamura Akitatsu

  Dept. of Oral-histology, Kyushu Dental College

• Kawano Takaaki

  Dept. of Oral-histology, Kyushu Dental College

• Horio Akihide

  Dept. of Oral-histology, Kyushu Dental College

• Kohjiro Tatsuji

  Dept. of Oral-histology, Kyushu Dental College

• Shimamura Akitatsu

  Dept. Of Oral-histology Kyushu Dental College

• Horio Akihide

  Dept. Of Oral-histology Kyushu Dental College

• Kawano Takaaki

  Dept. Of Oral-histology Kyushu Dental College

• Kohjiro Tatsuji

  Dept. Of Oral-histology Kyushu Dental College

• Saegusa H.

  Dept. Of Biol. School Of Sci. Nagoya Univ.

関連論文

• A CASE OF THE DENTINAL TUBULES OF ENORMOUS SIZE AND CAPILLARIES FOUND IN HUMAN TOOTH
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