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Ann Geriatr Med Res  <  Volume (); 1999 <  Articles

Annals of Geriatric Medicine and Research  
The Association Between the Number of Natural Remaining Teeth and Appendicular Skeletal Muscle Mass in Korean Elders
Sunyoung Kim1, Jin-Young Min2, Hong Soo Lee3, Kung-Rock Kwon4, Jinho Yoo1, Chang Won Won1
1Department of Family Medicine, Kyung Hee University Medical Center, Seoul, Korea
2Institute of Health and Environment, School of Public Health, Seoul National University, Seoul, Korea
3Department of Family Medicine, Ewha Womans University School of Medicine, Seoul, Korea
4Department of Prosthodontics, School of Dentistry, Kyung Hee University, Seoul, Korea
Correspondence to: Chang Won Won, MD, PhD
https://orcid.org/0000-0002-6429-4461
Department of Family Medicine, Kyung Hee University Medical Center, College of Medicine, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
Tel: +82-2-958-8697
Fax: +82-2-958-8699
E-mail: chunwon62@naver.com
Received: September 22, 2018; Revised: October 26, 2018; Accepted: October 31, 2018; Published online: December 26, 2018.
© The Korea Geriatrics Society. All rights reserved.

This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Background: The aim of this study was to examine the correlation between the number of remaining natural teeth (NRT) and the appendicular skeletal muscle mass index (SMI) in older adults. Methods: This study was based on data from the 2008-2010 Korea National Health and Nutritional Examination Surveys. The participants were 2,378 older participants (984 men and 1,394 women) aged over 65 years. Survey dentists conducted oral health examinations, and ASM was measured using dual-energy X-ray absorptiometry. Results: The participants with NRT≥20 had more ASM and SMI than those with NRT<20 in both sexes. SMI was correlated with NRT in men (r=0.018, p<0.001) and in women (r=-0.007, p<0.001). The positive correlation between the NRT and SMI remained significant in men even after adjusting for age, marital status, income, smoking, drinking, physical activity, protein intake, energy intake, calcium intake, body mass index, fasting blood glucose level, medications, and prostheses (β=0.011, p=0.001). In women, the correlation disappeared after adjustment for smoking, alcohol, physical activity, protein intake, energy intake, calcium intake, marital status, income, fasting basal glucose, medication administration, and prostheses. Conclusion: This study showed a correlation between NRT and SMI in those ≥65 years of age in Korea. The relationship persisted in men, but not in women, even after adjusting for confounders.
Keywords: Sarcopenia, Tooth loss, Frail elderly


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