Journal of Prosthodontic Research
Online ISSN : 1883-9207
Print ISSN : 1883-1958
ISSN-L : 1883-1958
Relationship between the number of teeth, occlusal force, occlusal contact area, and dietary hardness in older Japanese adults: The SONIC study
Tomoaki Mameno , Yoshitaka Tsujioka, Motoyoshi Fukutake, Yuki Murotani, Toshihito Takahashi, Kodai Hatta, Yasuyuki Gondo, Kei Kamide, Tatsuro Ishizaki, Yukie Masui, Yusuke Mihara, Yuichi Nishimura, Hiromasa Hagino, Kotaro Higashi, Suzuna Akema, Yoshinobu Maeda, Mai Kabayama, Hiroshi Akasaka, Hiromi Rakugi, Ken Sugimoto, Hitomi Okubo, Satoshi Sasaki, Kazunori Ikebe
Author information
Keywords: Occlusal force, Occlusal contact area, Habitual diet, Epidemiology, Gerodontology
JOURNAL OPEN ACCESS Advance online publication
Supplementary material

Article ID: JPR_D_23_00050

Details
Download PDF (775K)
Download citation RIS

(compatible with EndNote, Reference Manager, ProCite, RefWorks)

BIB TEX

(compatible with BibDesk, LaTeX)

Text
How to download citation
Contact us
Abstract

Purpose: Individuals with impaired masticatory function tend to prefer soft foods, which results in decreased masticatory muscle activity. This study examined the association between the oral condition (number of teeth, occlusal force, and occlusal contact area) and dietary hardness using a daily dietary questionnaire.

Methods: This cross-sectional study evaluated 1841 participants aged 69–71 and 79–81 years. Registered dentists examined the number of teeth, occlusal force, and occlusal contact area. Dietary hardness was defined as the estimated masticatory muscle activity required for a habitual diet. Habitual diet during the preceding month was assessed using a brief self-administered diet history questionnaire. Confounding factors, such as age, sex, socioeconomic status, smoking habits, history of chronic diseases (hypertension, hyperlipidemia, and diabetes), and cognitive function were also evaluated. Multivariate linear regression analyses were performed to assess the association between dietary hardness and each oral condition.

Results: Occlusal force (standardized regression coefficients [β]=0.08, P < 0.01) and occlusal contact area (β=0.06, P < 0.01) were significantly associated with dietary hardness after adjusting for the confounding factors. Number of teeth was not significantly associated with dietary hardness. In addition, the associations between dietary hardness, sex, and a history of diabetes were stronger than those between dietary hardness and oral factors.

Conclusions: Occlusal force and contact area were significantly associated with dietary hardness as estimated from the masticatory muscle activity using a daily diet questionnaire.

Content from these authors
© 2023 Japan Prosthodontic Society

This is an open-access article distributed under the terms of Creative Commons Attribution-NonCommercial License 4.0 (CC BYNC 4.0), which allows users to distribute and copy the material in any format as long as credit is given to the Japan Prosthodontic Society. It should be noted however, that the material cannot be used for commercial purposes.
https://creativecommons.org/licenses/by-nc/4.0/
Previous article Next article
Favorites & Alerts

Recently viewed articles
Message From JPR
Predecessor

Nihon Hotetsu Shika Gakkai Zasshi

Nihon Hotetsu Shika Gakkai Zasshi

Share this page
feedback
 Top