title: [Three-dimensional imaging for quantitative evaluation of facial profile of edentulous patients before and after complete dentures restoration].
abstract: OBJECTIVE
  To collect and analyze the Three-dimensional (3D) facial profile variation of edentulous patients restored by complete denture.
  
  
  METHODS
  The 3D facial images of 20 Atwood Class II edentulous patients were taken by DSC-2 3D facial imaging system before and after restoration of complete denture. Then, the two 3D facial images of each patient before and after restoration were registered in the same coordinate system by partial structure overlap. The differences between these two 3D facial images were statistically analyzed.
  
  
  RESULTS
  The major facial profile variation of Atwood Class II edentulous patients restored by complete denture focused in the area around the upper lip and the corner of the mouth. The change of lower lip and chin area was not obvious. The shift in the sagittal direction was significantly more evident than that in the vertical direction, while the shift in the horizontal direction was the least one.
  
  
  CONCLUSIONS
  The pattern of facial profile variation of edentulous patients restored by complete denture based on 3D imaging may provide reliable data support for prediction and communication in clinical practice.
authors.affiliation: Department of Geriatrics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wei
authors.affiliation: Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Gui
authors.initials: G
authors.lastname: Chen
authors.affiliation: Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Han
authors.affiliation: Department of Geriatrics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Xiao-yang
authors.initials: XY
authors.lastname: Hu
authors.affiliation: Department of Geriatrics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Han-ping
authors.initials: HP
authors.lastname: Zhang
authors.affiliation: Department of Geriatrics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Xu-liang
authors.initials: XL
authors.lastname: Deng
mesh_terms: D003824:Denture, Complete; D006801:Humans; D021621:Imaging, Three-Dimensional; D008046:Lip; D009066:Mouth, Edentulous