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Association of the number of remaining teeth with kidney function in community-dwelling healthy older adults: a cross-sectional study

Journal of the Korean Association of Oral and Maxillofacial Surgeons / Journal of the Korean Association of Oral and Maxillofacial Surgeons, (P)2234-7550; (E)2234-5930
2023, v.49 no.5, pp.243-251
https://doi.org/10.5125/jkaoms.2023.49.5.243
Yui Nanba (Department of Oral and Maxillofacial Surgery, Shimane University Faculty of Medicine)
Yuhei Matsuda (Department of Oral and Maxillofacial Surgery, Shimane University Faculty of Medicine)
Satsuki Watanabe (Department of Oral and Maxillofacial Surgery, Shimane University Faculty of Medicine)
Mayu Takeda (Department of Oral and Maxillofacial Surgery, Shimane University Faculty of Medicine)
Takafumi Abe (Center for Community-Based Healthcare Research and Education (CoHRE), Head Office for Research and Academic Information, Shimane University)
Kazumichi Tominaga (Center for Community-Based Healthcare Research and Education (CoHRE), Head Office for Research and Academic Information, Shimane University)
Minoru Isomura (Center for Community-Based Healthcare Research and Education (CoHRE), Head Office for Research and Academic Information, Shimane University)
Takahiro Kanno (Department of Oral and Maxillofacial Surgery, Shimane University Faculty of Medicine)

Abstract

Objectives: Although a few studies have investigated the relationship between kidney and oral function (number of remaining teeth), their results remain inconclusive. Therefore, this study aimed to investigate the relationship between kidney function and oral health in community-dwelling healthy elderlies and examine the factors associated with kidney function. Materials and Methods: We used cross-sectional data from the Shimane prefecture cohort recruited by the Center for Community-Based Health Research and Education in 2019. We collected clinical data on dental status, background factors and kidney function (estimated glomerular filtration rate [eGFR], mL/min/1.73 m2 and creatinine levels, mg/dL). Results: The study enrolled 481 participants, whose mean age was 66.7±7.4 years, and 223 (46.4%) participants were men. Multivariate analysis revealed significant correlations between eGFR (B=0.17, P=0.04), creatinine (B=–0.54, P<0.01), and the number of remaining teeth. The number of remaining teeth was associated with creatinine and eGFR, which are indicators of kidney function. Conclusion: This study suggests that preserving the teeth may prevent decline in kidney function. Dental professionals should provide instructions and professional care to reduce the risk of systemic diseases such as kidney dysfunction.

keywords
Kidney function, Oral function, Remaining teeth, Chronic kidney disease

Journal of the Korean Association of Oral and Maxillofacial Surgeons