Oral health target contributing to the healthy living of older people with tooth loss

• Project/Area Number: 18K09904
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 57080:Social dentistry-related
• Research Institution: Tohoku University
• Principal Investigator: Miyoshi Yoshitada 東北大学, 歯学研究科, 大学院非常勤講師 (10508948)
• Co-Investigator(Kenkyū-buntansha): 大井 孝 東北大学, 歯学研究科, 非常勤講師 (10396450) ; 服部 佳功 東北大学, 歯学研究科, 教授 (40238035)
• Project Period (FY): 2018-04-01 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 口腔保健 / フレイル / 高齢者 / 栄養状態 / 栄養 / 8020運動 / 大迫研究 / コホート研究 / 口腔機能 / 介護予防

Outline of Final Research Achievements

We examined the relationship between oral health and nutritional status in older people aged 65 years or older those with less than 20 teeth who participated in the Ohasama study. Nutritional status was determined by referring to the Dietary Reference Intakes for Japanese (2020), and a BMI score of less than 21.5 was defined as malnutrition. The analysis cross-sectionally showed that low tongue pressure was associated with malnutrition. For older people with less than 20 teeth, it was suggested that it is significant to maintain adequate tongue pressure through prosthodontic treatment and rehabilitation to decrease the risk of malnutrition.

Academic Significance and Societal Importance of the Research Achievements

現在歯数が20歯未満の高齢者に対する歯科保健目標は僅かである。一方で、栄養の充足はフレイル対策の中でも中心的な役割を果たし、その他の健康関連アウトカムとも強く関連する。研究の結果、20歯未満高齢者に対する低栄養予防には舌圧を維持することが重要であると示され、これは間接的に義歯などの補綴装置の装着や日頃の口腔のリハビリテーションが重要である可能性を示唆し、社会的な課題であるフレイル対策にも通じる成果である。

Research Products

• [Journal Article] Regular dental visits, periodontitis, tooth loss, and atherosclerosis: The Ohasama study (2022)
  • Author(s): Sho Yamada,Takamasa Komiyama,Takashi Ohi,Takahisa Murakami,Yoshitada Miyoshi,Kosei Endo,Takako Hiratsuka,Azusa Hara,Michihiro Satoh,Yukako Tatsumi,Ryusuke Inoue,Kei Asayama,Masahiro Kikuya,Atsushi Hozawa,Hirohito Metoki,Yutaka Imai,Takayoshi Ohkubo,Yoshinori Hattori
  • Journal Title: J Periodontal Res. Volume: in press Issue: 3 Pages: 1-8
  • DOI: 10.1111/jre.12990
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The association between bilateral maximum occlusal force and all-cause mortality among community-dwelling older adults: The Tsurugaya project (2020)
  • Author(s): Ohi Takashi、Komiyama Takamasa、Miyoshi Yoshitada、Murakami Takahisa、Tsuboi Akito、Tomata Yasutake、Tsuji Ichiro、Watanabe Makoto、Hattori Yoshinori
  • Journal Title: Journal of Prosthodontic Research Volume: 64 Issue: 3 Pages: 289-295
  • DOI: 10.1016/j.jpor.2019.08.005
  • NAID: 130007885755
  • ISSN: 1883-1958, 1883-9207
  • Peer Reviewed
• [Presentation] 現在歯数と歯周炎の交互作用が脳形態変化に与える影響 大迫研究における縦断 MRI 解析 (2022)
  • Author(s): 山口哲史, 小宮山貴将, 大井 孝, 村上任尚, 佐藤倫広, 沼崎貴子, 三好慶忠, 遠藤耕生, 山田 唱, 目時弘仁, 大久保孝義, 服部佳功
  • Organizer: 日本補綴歯科学会 第131回学術大会
• [Presentation] Deviation of Subjective and Objective Masticatory Ability in Older Adults (2019)
  • Author(s): Takamasa Komiyama, Takashi Ohi, Yoshitada Miyoshi, Takako Hiratsuka, Yasutake Tomata, Shu Zhang, Ichiro Tsuji, Makoto Watanabe, Yoshinori Hattori.
  • Organizer: 97th General Session & Exhibition of the IADR
  • Int'l Joint Research
• [Presentation] 20歯未満の地域高齢者における介護予防と関連する口腔保健指標の検討. (2019)
  • Author(s): 小宮山貴将, 大井孝, 三好慶忠, 平塚貴子, 渡邉誠, 服部佳功.
  • Organizer: 日本老年学会総会