著者

Tetsu Kamiya Yoshio Toyama Keigo Hanyu Takahiro Kikuchi Yukihiro Michiwaki

出版者

Japanese Society for Food Science and Technology

雑誌

Food Science and Technology Research (ISSN:13446606)

巻号頁・発行日

pp.FSTR-D-23-00125, (Released:2023-09-11)

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This study aims to analyze the forces acting on the organs from the bolus during swallowing, excluding direct organ contact forces. We simulated the swallowing process of healthy individuals ingesting thickened non-Newtonian foods using a swallowing simulator based on the moving-particle simulation method. The force vectors acting on the organs and the bolus shape were extracted at each time interval. A two-dimensional graph matrix was developed to visualize the temporal and spatial relationships between force and time for comprehensive interpretation and discussion. The graph matrix revealed that the bolus originated from tongue movement and was transferred between the oral cavity and pharynx, with coordinated movements of each organ occurring in pairs with balanced forces of the tongue and other organs. Information on the organ forces may offer a novel perspective for interpreting conventional mechanical indicators such as high-resolution manometry or tongue-pressure measurements.

著者

Yutaka Maruoka Yukihiro Michiwaki Hideki Sekiya Yasuhiro Kurasawa Nagato Natsume

出版者

International Research and Cooperation Association for Bio & Socio-Sciences Advancement

雑誌

BioScience Trends (ISSN:18817815)

巻号頁・発行日

pp.2022.01046, (Released:2022-02-21)

参考文献数

80

被引用文献数

3

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Oral care is defined in a narrow sense as cleaning of the teeth, oral cavity, and dentures, and in a broad sense as the maintenance of oral functions (feeding, swallowing, chewing, speech, aesthetics, etc.), dental treatment, feeding and swallowing training, and articulation training. In the past, it was recognized as simply cleaning the mouth, but the concept of oral care has gradually expanded, and many studies and surveys have been conducted in cooperation with various other professions. As a result, oral health care is involved not only in the prevention of pneumonia, but also in the onset and suppression for severity of diabetes, cardiovascular diseases, some malignant tumors, cerebrovascular diseases, rheumatoid arthritis, dementia, etc. It is also a powerful supportive therapy in cancer treatment. In the terminal stages of life, oral health care can help people to maintain their dignity by continuing to consume food orally until the end of their lives, and in times of disaster, oral health care has been found to be as important as attention to deep vein thrombosis. It has also been found to be effective in preventing severe diseases such as COVID-19. And, although it has not been discussed much, it has been found to have medical and economic benefits such as reducing the duration of hospitalization and treatment costs. This article reviews the results of research to date.