title: [Effect of occlusal interference on fluctuation of body's gravity center].
abstract: OBJECTIVE
  To study if the occlusal interference affects the fluctuation of body's gravity center.
  
  
  METHODS
  An artificial occlusal interference was separately applied on 14 volunteers (7 males and 7 females, mean age 23.2 years). Fluctuations of body's gravity center were measured before wearing the occlusal interference appliance, at 30 minutes and 24 hours after wearing the appliance.
  
  
  RESULTS
  The length and area of fluctuation of body's gravity center with the interference appliance were greater than that without it. The length of fluctuation of gravity center was 40.22 cm, 41.66 cm and 43.21 cm in eye-opening conditions and 56.96 cm2, 61.93 cm2, 66.9 cm2 in eye-closing condition. The area of fluctuation of gravity center was 3.3 cm2, 3.43 cm2, 3.61 cm2 in eye-opening condition and 4.63 cm2, 5.00 cm2, 6.47 cm2 in eye-closing condition. The female volunteers showed more changes than the male ones.
  
  
  CONCLUSIONS
  Occlusal interference does affect the fluctuation of body's gravity center.
authors.affiliation: Department of Prosthodontics, Peking University School of Stomatology, Beijing 100081, China.
authors.forename: J
authors.initials: J
authors.lastname: Tan
authors.forename: H
authors.initials: H
authors.lastname: Feng
authors.forename: X
authors.initials: X
authors.lastname: Yun
mesh_terms: D000328:Adult; D003766:Dental Occlusion; D005260:Female; D020073:Gravidity; D006801:Humans; D008297:Male