Department of Dental Hygiene, Eulji University College of Health Science, Seongnam, Korea.
J Periodontol. 2019 Jan;90(1):90-97. doi: 10.1002/JPER.18-0242. Epub 2018 Aug 30.
Handgrip strength is easily assessed by muscle strength and is an important factor for health and physical performance. Empirical evidence for the association between the number of teeth and handgrip strength remains controversial. The objective of this study was to investigate the association between the number of teeth and handgrip strength.
Data from the Korea National Health and Nutrition Examination Survey (KNHANES) 2014 to 2015 were used (N = 7,741). The number of teeth was categorized into three groups: 0 to 9 teeth, 10 to 19 teeth, and 20 to 28 teeth. Handgrip strength of the participants was measured using a digital hand dynamometer. Multivariate linear regression and logistic regression models were fitted to assess the association between the number of teeth and hand grip strength after adjusting for sociodemographic factors, general health behaviors, and oral and general health factors.
Reduced handgrip strength was much more frequent in male and female participants with a lower number of teeth. Each tooth increased handgrip strength by 0.12 kg and 0.07 kg in males and females, respectively (P < 0.001 for both males and females). The association between the number of teeth and handgrip strength disappeared in females in the fully adjusted models, but the odds ratio of participants with 0 to 9 teeth was 1.73 (95% confidence interval: 1.02 to 2.95), which was higher than the reference group in males.
Our results showed a significant association between the number of teeth and handgrip strength in Korean adults.
握力可通过肌肉力量轻松评估，是健康和身体机能的重要因素。牙齿数量与握力之间的关系的实证证据仍存在争议。本研究旨在探讨牙齿数量与握力之间的关系。
使用了 2014 年至 2015 年韩国国家健康与营养调查（KNHANES）的数据（N=7741）。牙齿数量分为三组：0-9 颗牙、10-19 颗牙和 20-28 颗牙。使用数字握力计测量参与者的握力。调整社会人口统计学因素、一般健康行为以及口腔和一般健康因素后，采用多元线性回归和逻辑回归模型评估牙齿数量与握力之间的关系。
牙齿数量较少的男性和女性参与者中，握力较弱的情况更为常见。男性和女性中，每颗牙齿分别使握力增加 0.12kg 和 0.07kg（男性和女性均 P<0.001）。在完全调整的模型中，女性牙齿数量与握力之间的关联消失，但 0-9 颗牙齿的参与者的比值比为 1.73（95%置信区间：1.02 至 2.95），高于男性的参考组。
我们的结果表明，韩国成年人的牙齿数量与握力之间存在显著关联。
