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pp.468-471
Published Date 1954/11/20
DOI https://doi.org/10.11477/mf.1492201209

 DOTA and Terayama maintain that there are points that do strongly differ in the process of pneumatization of the two structures namely, the air cells of the temporol bone and the air cavity of paranasal sinus, as follows: (1) Developmentally, they are derived from mesodermic tisses, but, the former is essentially the outcome of metamorphosis of the spongy substance of the flat bone in part while, the latter is not only unrelated to this spongy substance but, the process of growth is totally different.

 (2) The cavity wall in the former is composed of bony lamellae but, in the latter of compact bone.

 (3) Mesodermic producioc of round cells in the two differ from each other by cause and effect.

 (4) In the growth of the two there is a common inherited force of element that effects them alike but, the result produced by this force is different.


Copyright © 1954, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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