アブストラクト(27巻2号:神奈川歯学)

神奈川歯学

Japanese

Title : 頭蓋に関する動的応力解析の基礎的検討 - 第1報 導入の可能性と基礎的検討 -
Subtitle : 原著
Authors : 松尾悦郎, 豊田實, 神永美穂子, 西田尚史, 服部慎太郎, 和田力, 木村茂之
Authors(kana) :
Organization : 神奈川歯科大学補綴学教室第I講座
Journal : 神奈川歯学
Volume : 27
Number : 2
Page : 247-255
Year/Month : 1992 / 9
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」頭蓋は, 人類学的視点から見て, 環境, 文化, 機能等の様々な要因の影響を受けて進化発達し, その形態を得るに至ったと考えられる. 従って, 咬合力や外力などの衝撃に対する生体応答は, 力学的に安定したものであり, 極めて効率よく障害を防護するような構造を備えていると考えられる. そこで, これらの衝撃応答の状況, すなわち力の伝達経路および分布状態を解明することは, 生体力学的に安定した補綴装置設計の一指針を与えるものと考え, 当教室ではこれまで動的衝撃としての振動を応用して, イヌ頭部やヒト乾燥頭蓋をはじめとした各種の基礎的実験を行い, その減衰から衝撃力の伝達経路の解明に着手し, 極めて合理的な衝撃応答の概略を明らかにしてきた. その一つとして, 下顎から上顎に向かって作用した力は, 頭蓋全体に拡散するように伝達し, 逆に頭蓋から下顎骨に向かって作用した力は, 下顎骨に集約するように伝達される傾向があることが分かかってきた.
Practice : 歯科学
Keywords : 顔面頭蓋, 動的応力解析システム, 熱弾性効果

English

Title : A Basic Study on Human Dry Skull with the Dynamic Stress Analysis - 1st. Report Basic Study and Results of the Analysis -
Subtitle :
Authors : Etsuro MATSUO, Minoru TOYODA, Mihoko KAMINAGA, Naofumi NISHIDA, Shintaro HATTORI, Chikara WADA, Shigeyuki KIMURA
Authors(kana) :
Organization : The 1st Department of Prosthetic Dentistry, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 27
Number : 2
Page : 247-255
Year/Month : 1992 / 9
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : Abstract: Human skulls are believed to have acquired their present morphology throuth evolution affected by culture, living environment, the functionality required, and other anthropological factors. The present skeletal features are believed to have a structure which is dynamically stable and is suitable for protecting the living body effectively from impact and stress caused by occlusal activity and external force. The betterunderstanding of the stress absorption mechanism of the skulls, including stress propagation routes and the distribution pattern of stress would help design biodynamically stable prostheses. With this belief, we has conducted basic experiments involving application of dynamic impact to the specimen in an effort to unravel the impact response. There are many reports on the results of analysis of stress within a facial skull. However, they are short of hammering out decisive judgments on the problems concerning equality between the bones and models and analysis under dynamic load conditions. Under these circumstances, our group has obtained new results by conducting research using stress analyzer SPATE9000 (OMETRON Co.). This experimental device is equipped with the non-contact type dynamic stress analysis system based on the fundamental theory of thermoelastic effect in which the tensile and compressive thermal energy change of a physical solid with repeated load will be in proportion to the chief stress sum. The measuring sensitivity was very acute with the temperature change at 0.001K. As a result, a stress concentration was recognized at the canine fossa regions on the facial forehead and gave a conjecture for the relation with the figure of anterior nasal aperture. And there was observed a concentration trend mainly to the compact bone regions. The experiment conducted using SPATE9000 will be elaborated in the following.
Practice : Dentistry
Keywords :