title: Significance of occlusal force for dietary fibre and vitamin intakes in independently living 70-year-old Japanese: from SONIC Study.
abstract: OBJECTIVE
  The number of teeth has frequently been used as an indicator of oral health in investigations of food intake; however, this measure does not represent the efficacy of the masticatory performance. Masticatory performance may be more important for food selection and avoidance than number of remaining teeth. The aim of this study was to investigate the association of occlusal force with habitual dietary intakes in independently living older Japanese.
  
  
  METHODS
  The study population was 757 community-dwelling people aged 69-71 years old. Bilateral maximal occlusal force in the intercuspal position was measured with pressure-sensitive sheets. Removable denture wearers kept their dentures in place during the measurements. Dietary habits during the preceding month were assessed using a brief-type self-administered diet history questionnaire that measures consumption frequencies of selected food commonly consumed and calculates energy-adjusted dietary intakes. Linear trends of food and nutrient intakes with decreasing occlusal force were tested after adjusting for gender and socioeconomic factors.
  
  
  RESULTS
  After adjusting for socioeconomic status and the number of remaining teeth, decline of occlusal force was significantly associated with lower intakes of vegetables, vitamins A, C, B6, folate, and dietary fibre (P for trend<0.05). In contrast, number of teeth was significantly associated only with calcium and zinc, controlling for occlusal force.
  
  
  CONCLUSIONS
  It is concluded that occlusal force was significantly associated with intakes of vitamins and dietary fibre rather than number of remaining teeth in independently living older Japanese.
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka, Japan.
authors.forename: Chisato
authors.initials: C
authors.lastname: Inomata
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka, Japan. Electronic address: ikebe@dent.osaka-u.ac.jp.
authors.forename: Kazunori
authors.initials: K
authors.lastname: Ikebe
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka, Japan.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Kagawa
authors.affiliation: Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
authors.forename: Hitomi
authors.initials: H
authors.lastname: Okubo
authors.affiliation: Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Sasaki
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Okada
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Takeshita
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka, Japan.
authors.forename: Sayaka
authors.initials: S
authors.lastname: Tada
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka, Japan.
authors.forename: Ken-Ichi
authors.initials: K
authors.lastname: Matsuda
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Kurushima
authors.affiliation: Department of Periodontics, Graduate School of Dentistry, Osaka University, Osaka, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kitamura
authors.affiliation: Department of Periodontics, Graduate School of Dentistry, Osaka University, Osaka, Japan.
authors.forename: Shinya
authors.initials: S
authors.lastname: Murakami
authors.affiliation: Graduate School of Human Sciences, Osaka, Japan.
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Gondo
authors.affiliation: Graduate School of Medicine, Osaka University, Osaka, Japan.
authors.forename: Kei
authors.initials: K
authors.lastname: Kamide
authors.affiliation: Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan.
authors.forename: Yukie
authors.initials: Y
authors.lastname: Masui
authors.affiliation: Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan.
authors.forename: Ryutaro
authors.initials: R
authors.lastname: Takahashi
authors.affiliation: Keio University, School of Medicine, Tokyo, Japan.
authors.forename: Yasumichi
authors.initials: Y
authors.lastname: Arai
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka, Japan.
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Maeda
mesh_terms: D000368:Aged; D001732:Bite Force; D015992:Body Mass Index; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D003817:Dentition; D003824:Denture, Complete; D003832:Denture, Partial, Removable; D004043:Dietary Fiber / Q000008:administration & dosage*; D004435:Eating / Q000502:physiology; D002149:Energy Intake; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D057187:Independent Living; D007564:Japan; D008297:Male; D008409:Mastication / Q000502:physiology; D011446:Prospective Studies; D012737:Sex Factors; D012959:Socioeconomic Factors; D014815:Vitamins / Q000008:administration & dosage*
chemical_list: D004043:Dietary Fiber; D014815:Vitamins
keywords: Dietary fibre; Dietary intake; Elderly; Multivariate analysis; Number of teeth; Occlusal force; Vegetable; Vitamin