アブストラクト（16巻2号：神奈川歯学）

神奈川歯学

Japanese

Title　： 関節円板の血管構築と微細血管の超微構造について 第2報 幼犬の関節円板について
Subtitle　： 原著
Authors　： 間宮信
Authors（kana）　：
Organization　： 神奈川歯科大学口腔解剖学教室
Journal　： 神奈川歯学
Volume　： 16
Number　： 2
Page　： 237-256
Year/Month　： 1981 / 9
Article　： 原著
Publisher　： 神奈川歯科大学学会
Abstract　： 「抄録」 顎関節における円板の介在は, 関節の可動範囲を拡大し, 急激な圧力を緩衝し, 顎運動を円滑にするために極めて重要である. 円板の発生初期における密な血管分布は, 成長につれ次第に疎になり, 成長完成後円板中央部は広い無血管域となる. このことは動物に共通の事実である. そこでイヌを用いてヒト胎児と比較しながら, 成長に伴う円板内における血管の消失していく過程や構造上の変化を, 乳歯未萌出期より永久歯列完成期まで, 経時的な推移を観察した. その結果, 乳歯未萌出期では円板全域に分布していた血管網は, 加齢とともに, 末梢部のループ形成, 中央部付近の血管内腔の著しい狭窄などによって消失していくと思われる. 血管の超微構造では, 早期乳歯列期の円板中央部の血管壁に, 多くの小孔と内皮細胞間の離開像がみられ, 乳歯列完成期では, 著しい血管内腔に向かう内皮細胞の核の膨隆がみられた. しかし各時期を通じて滑膜直下には, 密な微細血管が存在し, そのほとんどは有窓性血管であり, その基底膜は厚く, 多層構造を有していた.
Practice　： 歯科学
Keywords　：

English

Title　： Architecture and Ultrastructure of Vasculature in the Articular Disc of the Temporomandibular Joint in Dog. 2. Articular Disc of Puppies.
Subtitle　：
Authors　： Makoto MAMIYA
Authors（kana）　：
Organization　： Department of Oral Anatomy, Kanagawa Dental College
Journal　： Kanagawa Shigaku
Volume　： 16
Number　： 2
Page　： 237-256
Year/Month　： 1981 / 9
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： An interposed articular disc in the temporomandibular joint is very important for maintenance of an effective mandibular movement by enlarging the movable range of the joint and by acting as a buffer against a shock in the occlusion and mastication. A dense vascular distribution of the entire disc in the early stage of development gradually disappears with growth, leaving a wide avascular area in the center eventually. This phenomenon is equally seen in the animals, although it varies a little according to the species. Dogs were used, in comparison with the human fetuses, to study the process of disappearance of blood vessels and structural changes of the vessels in the disc chronologically, from the stage of edentulous jaws to that of completion of the permanent dentition. The vascular network was distributed in the entire disc in the stage of edentulous jaws. As the stage advanced it underwent morphological changes such as loop formation in the peripheral part and narrowing the capillary lumen followed by disappearance of the vasculature in the central part of the disc. A number of small pores and disjunction of endothelial cells in the inner wall of the vessels appeared in the early stage of deciduous dentition. Eventually marked swelling of the nuclei of endothelial cells in the inner wall of the vessel was noted. Throughout the stages a dense network of fine blood vessels was found underneath the synovial membrane. Most of them were fenestrated blood vessels. A thick basement membrane in these vessels was multi-layered.
Practice　： Dentistry
Keywords　：