アブストラクト（20巻1号：神奈川歯学）

神奈川歯学

Japanese

Title　： イヌ口蓋部静脈叢にみられた静脈弁の電顕的観察
Subtitle　： 原著
Authors　： 高橋常男, 佐用安祥, 奥田喜康, 細川理恵, 高橋和人
Authors（kana）　：
Organization　： 神奈川歯科大学口腔解剖学教室
Journal　： 神奈川歯学
Volume　： 20
Number　： 1
Page　： 101-114
Year/Month　： 1985 / 6
Article　： 原著
Publisher　： 神奈川歯科大学学会
Abstract　： 「緒言」一般に弁は血液が心臓に戻る際に, 重力に反する血流方向をもつ, 四肢の静脈(伴行静脈, 皮静脈)によく発達している. またリンパ管系の弁は毛細リンパ管にはなく, それより太いリンパ管になると存在するといわれている. 弁は半月状をしたポケット構造で, その遊離端は血流の方向に向いている. また, 血管内膜と同様に表面は扁平な内皮細胞で被われる管腔壁より起こる二枚の内皮ヒダで, 内部は薄い線維性結合組織からなっている. これまで弁そのものの構造については上記の如く, 教科書的内容以上に注目されることは少なく, ほとんどが光顕レベルでの知識である. 特に超微構造となると, リンパ管弁の方が出現頻度が多いことから, リンパ弁について少数みられるだけで, 静脈弁については知る限りでは皆無である. 我々は血管鋳型法を用い, イヌ口蓋を前後方向に走る発達した静脈叢の存在についてすでに報告した.
Practice　： 歯科学
Keywords　：

English

Title　： Electron Microscopic Observations on Venous Valves in Venous Plexus of Dog Palate Mucosa
Subtitle　： Original article
Authors　： Tsuneo TAKAHASHI, Yasuyoshi SAYO, Yoshiyasu OKUDA, Rie HOSOKAWA, Kazuto TAKAHASHI
Authors（kana）　：
Organization　： Department of Oral Anatomy, Kanagawa Dental College
Journal　： Kanagawa Shigaku
Volume　： 20
Number　： 1
Page　： 101-114
Year/Month　： 1985 / 6
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： Morphological studies on valve cusps in venous plexus located in tela submucosa were conducted replica method, trimming method to observe the luminal surface of blood vessels, and the ultrathin section method. Mongrel adult dogs were used for specimens. Venous valves were predominant, especially from the rear of the molar teeth region to in the soft palate. The majority were bicusps, with some tricusps also appearing. The endothelium in these valves appeared somewhat slender when compared with that appearing in venous walls, having their long axis in accordance with the direction of blood flow. When comparing the intracellular component, there were some notable differences between the base and the tip of the cusps. Specifically cytoplasmic filaments(60-90A in diameter)increased in number near the tip of the cusps. Along the free edge of the cusps endothelial cells appeared with morphological characteristics which clearly differentiated them from endothelial cells found at the vessel wall. They not only contained abundant cytoplasmic filaments, but also exhibited many and varied pseudopod-like projections. Where intercellular space becomes narrow, the junctions were tight. However, open junctions with uniform intervals(150-200A) from the luminal side to the connective tissue side, were sometimes seen. Basal lamina was more common in valves than in the walls. Connective tissue in the valves consistcd of bundle-like gatherings of collagen fibrils distributed at comparative intervals near the valve tips, fine filaments, and fibroblasts.
Practice　： Dentistry
Keywords　：