title: [The influence of gilt to the retention of the complete metal crown].
abstract: OBJECTIVE
  To research the influence of gilt to the retention of the complete metal crown.
  
  
  METHODS
  Sixty Ni-Cr alloy complete metal crown were divided into three groups, control group (common Ni-Cr alloy complete metal crown), whole gold-plating group (whole gilding on the tissue surface of the inner Ni-Cr alloy complete metal crown), partial gold-plating group (gilding on the tissue surface of 1/3 cervical inner Ni-Cr alloy complete metal crown). The retention force of complete metal crown was measured by tensile force/pressure ergograph.
  
  
  RESULTS
  The retention force of control group, partial gold-plating group, whole gold-plating group were (657 +/- 151) N, (632 +/- 139) N, (569 +/- 103) N, respectively. There were significant differences between control group and whole gold-plating group, whole gold-plating group and partial gold-plating group (P < 0.05). There was no significant difference between control group and partial gold-plating group (P > 0.05).
  
  
  CONCLUSIONS
  The force of retention would decrease after gilding on the tissue surface of the inner Ni-Cr alloy complete metal crown, but have no influence to normal retention requirement of complete crown. Although the retention of partial gold-plating complete metal crown had somewhat decrease, it could be ignored.
authors.affiliation: Dept. of Prosthetics, Stomnatological Hospital, Nanchang University, Nanchang 330006, China.
authors.forename: Xiao-jun
authors.initials: XJ
authors.lastname: Zhang
authors.forename: Lian-shui
authors.initials: LS
authors.lastname: Shi
authors.forename: Hong-shui
authors.initials: HS
authors.lastname: Zhu
mesh_terms: D000818:Animals; D002858:Chromium Alloys; D003442:Crowns; D005260:Female; D006046:Gold; D006801:Humans; D013552:Swine
chemical_list: D002858:Chromium Alloys; D006046:Gold