title: [Comparison of the clinical effects between gold-alloy post-core-crowns and nickel-chromium-alloy post-core-crowns].
abstract: OBJECTIVE
  To evaluate the clinical effects between gold-alloy post-core-crowns and nickel-chromium-alloy post-core-crowns.
  
  
  METHODS
  Four hundred incisors, canines and premolars from 289 patients were selected. The crown had been destroyed seriously and root canal therapy was carried out. The root canal and the surface of the root were prepared well, then silicone impression material was injected into the root canal and the prepared plastic pin was inserted. Precise impression was taken and divided into two groups randomly. Group A was restored by gold-alloy post-core-crowns, while Group B was restored by nickel-chromium-alloy post-core-crowns. The patients were followed up for 3 years, the clinical effects were evaluated and compared using SPSS10.0 software package for Chi-square test.
  
  
  RESULTS
  There was no significant difference(P>0.05) of maintenance rate between the two groups, but there was significant difference (P<0.05) in the occurence of inflammation and staining of gingiva.
  
  
  CONCLUSIONS
  Gold-alloy post-core-crown is more suitable for restoration of teeth defects than nickel-chromium-alloy post-core-crown. Supported by Research Fund of Medical Science and Technology of Guangdong Province (Grant No. WSTJJ20070101310103196603041632).
authors.affiliation: Shenzhen Dental Center, Guangdong Province, China. sundentist@163.com
authors.forename: Chang-zheng
authors.initials: CZ
authors.lastname: Sun
authors.forename: Hong-tian
authors.initials: HT
authors.lastname: Qiu
authors.forename: Jie
authors.initials: J
authors.lastname: Lan
authors.forename: Xiao-ping
authors.initials: XP
authors.lastname: Li
mesh_terms: D000497:Alloys; D001641:Bicuspid; D002857:Chromium; D002858:Chromium Alloys; D003442:Crowns; D006046:Gold; D006801:Humans; D007180:Incisor; D009532:Nickel; D011176:Post and Core Technique; D012390:Root Canal Therapy; D019228:Tooth Crown
chemical_list: D000497:Alloys; D002858:Chromium Alloys; D002857:Chromium; C066018:nichrome; D006046:Gold; D009532:Nickel