title: [Study of the appearance difference of lower complete denture between functional and anatomic impression techniques].
abstract: OBJECTIVE
  To compare the difference in oblique external ridge, oblique internal ridge and alveolar process crest of lower complete denture base made through functional impression and anatomic impression techniques.
  
  
  METHODS
  Fifteen patients were chosen to treat with two kinds of complete dentures through functional impression and anatomic impression technique respectively. 3D laser scanner was used to scan the three-dimensional model of the denture base and the differences of the surface structural between two techniques in alveolar process crest, external and internal oblique ridges were analyzed, using paired t test with SPSS 12.0 software package.
  
  
  RESULTS
  Between the two techniques, there were significant differences in the areas of internal and external oblique ridge(P<0.01); there was no significant difference in the main support areas(P>0.05).
  
  
  CONCLUSIONS
  The results explain why there is less tenderness when functional impression technique is applied. The differences measured also indicate that sufficient buffering should be made in external and internal oblique ridge areas in clinic.
authors.affiliation: Department of Prosthodontics, Shanghai Stomatological Disease Center, Shanghai, China. zhongqun681115@yahoo.com.cn
authors.forename: Qun
authors.initials: Q
authors.lastname: Zhong
authors.forename: Xue-yin
authors.initials: XY
authors.lastname: Wu
authors.forename: Qing-yi
authors.initials: QY
authors.lastname: Shen
authors.forename: Qing-ping
authors.initials: QP
authors.lastname: Shen
mesh_terms: D003761:Dental Impression Technique; D003819:Denture Bases; D003779:Denture Design; D003824:Denture, Complete; D003826:Denture, Complete, Lower; D006801:Humans