title: [Centrographic analysis in Shanghai adults with normal occlusion].
abstract: OBJECTIVE
  To obtain the reference value of centrographic analysis of Shanghai adults with normal occlusion.
  
  
  METHODS
  Seventy five subjects of Han nationality at permanent dentition with normal occlusion were selected from Shanghai region (34 males, 41 females, age rang:18-21 years). Centrographic analysis was conducted on the basis of the lateral cephalograms, and the obtained data was compared with that of Caucasian. SAS9.2 software package was used for statistical analysis.
  
  
  RESULTS
  The reference value of centrographic analysis in Shanghai adults with normal occlusion was established. The facial centroid was located on the Ba-A plane; the upper centroid was positioned on the centroid plane; the lower centroid was positioned anterior to the centroid plane within 0.92-1.29mm; the long axis of lower incisor was positioned posterior to 1/3 Ba-Gn plane symphysis intersection; the long axis of upper incisor was positioned posterior to orbitale and the upper incisor was positioned in proper occlusion with the lower incisor. The lips were positioned on the outer profile plane. There was no significant difference between male and female adults (P>0.05).
  
  
  CONCLUSIONS
  Compared with that of Caucasians, mandibular position of adults in Shanghai was in a relative forward position, the incisor was labially inclined and the soft tissue in the lower 1/3 of the face was convex slightly.
authors.affiliation: Department of Orthodontics, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, China. gongyvhua@hotmail.com
authors.forename: Yu-hua
authors.initials: YH
authors.lastname: Gong
authors.forename: Ting-ting
authors.initials: TT
authors.lastname: Wei
authors.forename: Guo-hua
authors.initials: GH
authors.lastname: Tang
mesh_terms: D000293:Adolescent; D002508:Cephalometry; D002681:China; D003766:Dental Occlusion; D005006:Ethnicity; D005145:Face; D005260:Female; D006801:Humans; D007180:Incisor; D008046:Lip; D008297:Male; D008334:Mandible; D012016:Reference Values; D055815:Young Adult