title: Prevalence of torus mandibularis among a group of elderly Japanese and its relationship with occlusal force.
abstract: OBJECTIVE
  To examine the prevalence of torus mandibularis (TM) and identify clinical factors associated with its presence.
  
  
  METHODS
  A total of 664 Japanese adults over age 60 were studied by means of a questionnaire and clinical examination.
  
  
  RESULTS
  In all, 197 subjects (29.7%) had TM. We found a significant association between the presence of TM and torus palatinus (TP; 45.1% vs. 26.5%, p<0.001). Moreover, occlusal force with TM was significantly higher than without TM (p<0.05). Logistic regression adjusted for age and occlusal force revealed a significant relationship between TM and occlusal force and TP [p=0.005, odds ratio (OR)=2.44; p<0.001, OR=2.66, respectively].
  
  
  CONCLUSIONS
  This study suggests that there is a relationship between TM and factors related to occlusal factor.
authors.affiliation: Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Yoshinaka
authors.forename: Kazunori
authors.initials: K
authors.lastname: Ikebe
authors.forename: Masako
authors.initials: M
authors.lastname: Furuya-Yoshinaka
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Maeda
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001732:Bite Force; D002012:Bruxism / Q000453:epidemiology; D003817:Dentition; D005096:Exostoses / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D007575:Jaw, Edentulous / Q000453:epidemiology; D007576:Jaw, Edentulous, Partially / Q000453:epidemiology; D008297:Male; D008334:Mandible / Q000002:abnormalities*; D008875:Middle Aged; D021362:Palate, Hard / Q000002:abnormalities; D015995:Prevalence; D020186:Sleep Bruxism / Q000453:epidemiology; D013705:Temporomandibular Joint Disorders / Q000453:epidemiology