[Comparison of the clinical effects between gold-alloy post-core-crowns and nickel-chromium-alloy post-core-crowns].
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).
Sun
Chang-zheng
CZ
Shenzhen Dental Center, Guangdong Province, China. sundentist@163.com
Qiu
Hong-tian
HT
Lan
Jie
J
Li
Xiao-ping
XP
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
D000497:Alloys; D002858:Chromium Alloys; D002857:Chromium; C066018:nichrome; D006046:Gold; D009532:Nickel