title: [The comparison of bone densities of mandible and coxofemoral region between senile people with edentulous jaws and those with dentate jaws].
abstract: OBJECTIVE
  To observe if the senile people with edentulous jaws had lower bone dentilies of mandible and coxofemoral region than those with dentate jaws, and to find the systemic risk factors which were responsible for the tooth loss and the formation of edentulous jaws.
  
  
  METHODS
  Two groups of senile people were selected. One group was edentulous and the other was dentate. All of them were examined by dual energy X-ray absorptiometry(DXA).
  
  
  RESULTS
  The senile people with edentulous jaws had significantly lower bone densities of mandible(P < 0.001) and they also had lower bone densities of coxofemoral region than the dentate group people.
  
  
  CONCLUSIONS
  It indicated that the decreased of bone densities of mandible and coxofemoral region was one of the systemic risk factors for tooth loss and the formation of edentulous jaws.
authors.affiliation: School of Stomatology, Beijing Medical University, Beijing 100081.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhou
authors.forename: S
authors.initials: S
authors.lastname: Zhou
authors.forename: Y
authors.initials: Y
authors.lastname: Xue
mesh_terms: D000367:Age Factors; D000368:Aged; D015519:Bone Density; D005260:Female; D006615:Hip / Q000502:physiology*; D006801:Humans; D007568:Jaw / Q000502:physiology*; D007575:Jaw, Edentulous / Q000503:physiopathology*; D008297:Male; D008334:Mandible / Q000502:physiology*; D008875:Middle Aged