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Maekawa K, Ikeuchi T, Shinkai S, Hirano H, Ryu M, Tamaki K, Yatani H, Kuboki T, Kimura‐Ono A, Kikutani T, Suganuma T, Ayukawa Y, Gonda T, Ogawa T, Fujisawa M, Ishigaki S, Watanabe Y, Kitamura A, Taniguchi Y, Fujiwara Y, Edahiro A, Ohara Y, Furuya J, Nakajima J, Umeki K, Igarashi K, Horibe Y, Kugimiya Y, Kawai Y, Matsumura H, Ichikawa T, Ohkawa S, Baba K. Impact of number of functional teeth on independence of Japanese older adults. Geriatr Gerontol Int 2022; 22:1032-1039. [PMID: 36408675 PMCID: PMC10099778 DOI: 10.1111/ggi.14508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 10/18/2022] [Accepted: 10/22/2022] [Indexed: 11/22/2022]
Abstract
AIM To examine the relationship between the number of present and functional teeth at baseline and future incidence of loss of independence. METHODS Participants were community-dwelling older individuals who participated in a comprehensive geriatric health examination conducted in Kusatsu town, Japan, between 2009 and 2015. The primary endpoint was the incidence of loss of independence among participants, defined as the first certification of long-term care insurance in Japan. The numbers of present and functional teeth at baseline were determined via an oral examination. Demographics, clinical variables (e.g., history of chronic diseases and psychosocial factors), blood nutritional markers, physical functions, and perceived masticatory function were assessed. RESULTS This study included 1121 individuals, and 205 individuals suffered from loss of independence during the follow-up period. Kaplan-Meier estimates of loss of independence for participants with smaller numbers of present and functional teeth were significantly greater than for those with larger numbers of teeth. Cox proportional hazard analyses indicated that a smaller number of present teeth was not a significant risk factor after adjusting for demographic characteristics. However, the number of functional teeth was a significant risk factor after the adjustment (hazard ratio: 1.975 [1.168-3.340]). Additionally, higher hazard ratios were observed in other adjusted models, but they were not statistically significant. CONCLUSIONS The number of functional teeth may be more closely related to the future incidence of loss of independence than the number of present teeth. This novel finding suggests that prosthodontic rehabilitation for tooth loss possibly prevents the future incidence of this life-event. Geriatr Gerontol Int 2022; 22: 1032-1039.
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Affiliation(s)
- Kenji Maekawa
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | | | - Shoji Shinkai
- Tokyo Metropolitan Institute of Gerontology Tokyo Japan
- Kagawa Nutrition University Sakado Japan
| | | | - Masahiro Ryu
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Tokyo Dental College Tokyo Japan
| | - Katsushi Tamaki
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Kanagawa Dental University Graduate School Yokosuka Japan
| | - Hirofumi Yatani
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Osaka University Graduate School of Dentistry Osaka Japan
| | - Takuo Kuboki
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
| | - Aya Kimura‐Ono
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Okayama University Hospital Okayama Japan
| | - Takeshi Kikutani
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- The Nippon Dental University Tokyo Japan
| | - Takashi Suganuma
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Showa University School of Dentistry Tokyo Japan
| | - Yasunori Ayukawa
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Kyushu University Faculty of Dental Science Fukuoka Japan
| | - Tomoya Gonda
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Osaka University Graduate School of Dentistry Osaka Japan
| | - Toru Ogawa
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Tohoku University Graduate School of Dentistry Sendai Japan
| | - Masanori Fujisawa
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Meikai University School of Dentistry Sakado Japan
| | - Shoichi Ishigaki
- Research Planning and Promotion Committee Japan Prosthodontic Society Tokyo Japan
- Osaka University Graduate School of Dentistry Osaka Japan
| | - Yutaka Watanabe
- Tokyo Metropolitan Institute of Gerontology Tokyo Japan
- Faculty of Dental Medicine Hokkaido University Sapporo Japan
| | | | - Yu Taniguchi
- National Institute for Environmental Studies Ibaraki Japan
| | | | - Ayako Edahiro
- Tokyo Metropolitan Institute of Gerontology Tokyo Japan
| | - Yuki Ohara
- Tokyo Metropolitan Institute of Gerontology Tokyo Japan
| | | | | | - Kento Umeki
- Nihon University School of Dentistry at Matsudo Chiba Japan
| | | | | | | | - Yasuhiko Kawai
- Nihon University School of Dentistry at Matsudo Chiba Japan
| | | | - Tetsuo Ichikawa
- Tokushima University Graduate School Institute of Biomedical Sciences Tokushima Japan
| | - Shuji Ohkawa
- Meikai University School of Dentistry Sakado Japan
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Maekawa K, Ikeuchi T, Shinkai S, Hirano H, Ryu M, Tamaki K, Yatani H, Kuboki T, Kimura-Ono A, Kikutani T, Suganuma T, Ayukawa Y, Gonda T, Ogawa T, Fujisawa M, Ishigaki S, Watanabe Y, Kitamura A, Taniguchi Y, Fujiwara Y, Edahiro A, Ohara Y, Furuya J, Nakajima J, Umeki K, Igarashi K, Horibe Y, Kugimiya Y, Kawai Y, Matsumura H, Ichikawa T, Ohkawa S. Number of functional teeth more strongly predicts all-cause mortality than number of present teeth in Japanese older adults. Geriatr Gerontol Int 2020; 20:607-614. [PMID: 32227400 PMCID: PMC7317780 DOI: 10.1111/ggi.13911] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 02/11/2020] [Accepted: 03/03/2020] [Indexed: 12/20/2022]
Abstract
Aim Previous studies on the association between intraoral conditions and mortality in community‐dwelling older individuals reported that fewer present teeth (PT) are significant risk factors for mortality. However, how the number of PT relative to the number of functional teeth (FT), including both present and rehabilitated teeth, influences mortality has not been investigated fully. This study examined the impact of the number of FT on mortality among community‐dwelling Japanese older adults. Methods This study was a retrospective, observational and population‐based follow‐up study, which examined 1188 older individuals who participated in an annual geriatric health examination from 2009 to 2015. The average follow‐up period was 1697.0 ± 774.5 days. The primary outcome was all‐cause mortality at follow‐up. The numbers of PT and FT of each participant were counted during an oral examination. In addition, demographics, clinical variables, blood nutrient markers, physical functions and perceived masticatory function were measured. Results Kaplan–Meier analysis, followed by a log‐rank test, revealed that fewer PT (P < 0.001) and FT (P = 0.002) were significantly associated with a reduced survival rate. Cox's proportional hazard analysis indicated that the number of FT, but not the number of PT, was a significant independent mortality risk factor after adjusting for demographics, clinical variables, nutrient markers and physical functioning (P = 0.036, hazard ratio: 2.089). Conclusions Current results suggest that the number of FT more strongly predicts all‐cause mortality than the number of PT among community‐dwelling older adults. Further studies are necessary to consider the confounding of socioeconomic status and disability status. Geriatr Gerontol Int 2020; ••: ••–••.
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Affiliation(s)
- Kenji Maekawa
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Tomoko Ikeuchi
- Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Shoji Shinkai
- Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | | | - Masahiro Ryu
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Tokyo Dental College, Tokyo, Japan
| | - Katsushi Tamaki
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Kanagawa Dental University Graduate School, Yokosuka, Japan
| | - Hirofumi Yatani
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Takuo Kuboki
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | | | - Aya Kimura-Ono
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Okayama University Hospital, Okayama, Japan
| | - Takeshi Kikutani
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,The Nippon Dental University, Tokyo, Japan
| | - Takashi Suganuma
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Showa University School of Dentistry, Tokyo, Japan
| | - Yasunori Ayukawa
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Kyushu University Faculty of Dental Science, Fukuoka, Japan
| | - Tomoya Gonda
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Toru Ogawa
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Masanori Fujisawa
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Meikai University School of Dentistry, Sakado, Japan
| | - Shoichi Ishigaki
- Research Planning and Promotion Committee, Japan Prosthodontic Society, Tokyo, Japan.,Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Yutaka Watanabe
- Hokkaido University Faculty of Dental Medicine, Sapporo, Japan
| | | | - Yu Taniguchi
- National Institute for Environmental Studies, Ibaraki, Japan
| | | | - Ayako Edahiro
- Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Yuki Ohara
- Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | | | | | - Kento Umeki
- Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | | | | | | | - Yasuhiko Kawai
- Nihon University School of Dentistry at Matsudo, Chiba, Japan
| | | | - Tetsuo Ichikawa
- Tokushima University Graduate School, Institute of Biomedical Sciences, Tokushima, Japan
| | - Shuji Ohkawa
- Meikai University School of Dentistry, Sakado, Japan
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Braud A, Symoneaux R, Patron C, Brasse C, Forgerit V, Lourtioux F, Picouet P, Maitre I. How oral health and food sensory properties impact oral comfort during consumption of apples: A comparative approach in seniors and young adults. J Texture Stud 2019; 50:271-284. [DOI: 10.1111/jtxs.12450] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 05/15/2019] [Accepted: 05/21/2019] [Indexed: 11/29/2022]
Affiliation(s)
- Adeline Braud
- UFR OdontologieUniversité Paris Diderot, Sorbonne Paris Cité Paris France
| | - Ronan Symoneaux
- USC 1422 GRAPPE, Bretagne Loire Université, Ecole Supérieure d'Agricultures (ESA)—INRA, SFR 4207 QUASAV Angers France
| | - Corinne Patron
- USC 1422 GRAPPE, Bretagne Loire Université, Ecole Supérieure d'Agricultures (ESA)—INRA, SFR 4207 QUASAV Angers France
| | - Céline Brasse
- USC 1422 GRAPPE, Bretagne Loire Université, Ecole Supérieure d'Agricultures (ESA)—INRA, SFR 4207 QUASAV Angers France
| | - Véronique Forgerit
- USC 1422 GRAPPE, Bretagne Loire Université, Ecole Supérieure d'Agricultures (ESA)—INRA, SFR 4207 QUASAV Angers France
| | - Flore Lourtioux
- USC 1422 GRAPPE, Bretagne Loire Université, Ecole Supérieure d'Agricultures (ESA)—INRA, SFR 4207 QUASAV Angers France
| | - Pierre Picouet
- USC 1422 GRAPPE, Bretagne Loire Université, Ecole Supérieure d'Agricultures (ESA)—INRA, SFR 4207 QUASAV Angers France
| | - Isabelle Maitre
- USC 1422 GRAPPE, Bretagne Loire Université, Ecole Supérieure d'Agricultures (ESA)—INRA, SFR 4207 QUASAV Angers France
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