title: [The relationship between the calcaneus density and the degree of inflammation in patients with generalized aggressive periodontitis].
abstract: OBJECTIVE
  To evaluate the relationship between the calcaneus density and the degree of inflammation in patients with generalized aggressive periodontitis.
  
  
  METHODS
  Thirty one volunteers with healthy periodontium (as control group) and 38 patients with generalized aggressive periodontitis (as experimental group) were involved in this study. The average ages of the two groups were 27 and 23 years respectively. The clinical periodontal indexes and panoramic films were measured first. And the broadband ultrasonic attenuation(BUA) and T-score of the calcaneus were then determined using ultrasonic bone densitometer. SAS6.12 software package was used to analyse the data obtained.
  
  
  RESULTS
  The BUA values of the two groups were 62.76+/-4.61 and 70.47+/-4.41 respectively, the BUA value of the experimental group was significantly lower than that of the control group (P<0.001). Moreover, T-score was different between the two groups and the score in the experimental group was significantly lower than that in the control (P<0.001).
  
  
  CONCLUSIONS
  The BUA and T-score in patients with generalized aggressive periodontitis were significantly lower than that in the controls with healthy periodontium, which indicated that patients with generalized aggressive periodontitis had overall bone density decrease.
authors.affiliation: Department of Oral Medicine, School of Stomatology, Ninth People's Hospital, Shanghai Jiaotong University, China. jinhonglai2005@hotmail.com
authors.forename: Hong-lai
authors.initials: HL
authors.lastname: Jin
authors.forename: Chun-zhen
authors.initials: CZ
authors.lastname: Hu
authors.forename: Jing-jing
authors.initials: JJ
authors.lastname: Gu
authors.forename: Qiu-hua
authors.initials: QH
authors.lastname: Xu
mesh_terms: D015502:Absorptiometry, Photon; D010520:Aggressive Periodontitis; D015519:Bone Density; D002111:Calcaneus; D006801:Humans; D007249:Inflammation; D010519:Periodontium