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Odontology

pp 1–7 | Cite as

Association between number of pairs of opposing posterior teeth, metabolic syndrome, and obesity

  • Takahiro Iwasaki
  • Hideki Fukuda
  • Masayasu Kitamura
  • Yumiko Kawashita
  • Hideaki Hayashida
  • Reiko Furugen
  • Zenya Koyama
  • Yuichi Ando
  • Toshiyuki Saito
Original Article
  • 38 Downloads

Abstract

We investigated the relationship between the number of pairs of posterior teeth and metabolic syndrome (MetS), abdominal obesity (AO), and obesity, among Japanese adults. In 2005, 2,807 Japanese adults aged 25–74 years participated in the Survey of Dental Diseases and the National Health and Nutrition Survey. Based on the survey data, BMI, AO (JAS) determined by the Japan Atherosclerosis Society, AO (IDF) by the International Diabetes Federation, and MetS were assessed. Total functional tooth units (t-FTUs) were scored with pairs of opposing posterior teeth, including artificial teeth. Subjects were divided into three categories of chewing ability based on the score of t-FTUs: Poor (if score ≤ 9), Good (if score = 10–11), and Complete (if score = 12). The relationships between chewing ability and BMI ≥ 25, BMI ≥ 30, AO (JAS), AO (IDF), and MetS were tested using univariate and multivariate logistic regression analysis. The chewing ability was significantly associated with MetS, AO, and obesity in the univariate and multivariate logistic regression analysis. Adjusted OR of “Poor” compared to “Complete” were 1.51 (95% confidence interval (CI), 1.24–1.84) for BMI ≥ 25, 2.10 (95% CI 1.40–3.14) for BMI ≥ 30, 1.31 (95% CI 1.07–1.61) for AO (JAS), 1.40 (95% CI 1.15–1.70) for AO (IDF), and 1.34 (95% CI 1.04–1.72) for MetS. All were statistically significant. Preventing tooth loss and maintaining pairs of good chewing ability may be important factors in preventing MetS, AO, and obesity.

Keywords

Functional tooth units Molar Metabolic syndrome Middle-aged Japanese National survey 

Notes

Acknowledgements

The authors received no funds and grants for this study.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© The Society of The Nippon Dental University 2018

Authors and Affiliations

  • Takahiro Iwasaki
    • 1
    • 4
  • Hideki Fukuda
    • 1
  • Masayasu Kitamura
    • 1
  • Yumiko Kawashita
    • 2
  • Hideaki Hayashida
    • 1
  • Reiko Furugen
    • 1
  • Zenya Koyama
    • 1
  • Yuichi Ando
    • 3
  • Toshiyuki Saito
    • 1
  1. 1.Department of Oral Health, Graduate School of Biomedical SciencesNagasaki UniversityNagasakiJapan
  2. 2.Perioperative Oral Management CenterNagasaki University HospitalNagasakiJapan
  3. 3.National Institute of Public HealthSaitamaJapan
  4. 4.Department of Community Oral Health, School of DentistryAsahi UniversityGifuJapan

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