Comparison of clinical effects of au-pt based and ni-cr based porcelain crowns.
OBJECTIVE
To compare the long-term clinical effects of two kinds of crowns and bridges made of porcelain fused to Au-Pt alloy and Ni-Cr alloy.


METHODS
A total of 131 teeth (64 patients) were rehabilitated using porcelain-fused-to-metal crowns, among which 59 were rehabilitated with Au-Pt alloy metal ceramic crown and 72 with Ni-Cr alloy metal ceramic crown.The porcelain fracture, shade, marginal adaptation, gingival discoloration, and gingival status after finishing restoration and 36 months of follow-up were evaluated.


RESULTS
After 36 months of restoration, porcelain fused to Au-Pt alloy crown showed better clinical effects than porcelain fused to Ni-Cr alloy crown in shade, marginal adaptation, gingival discoloration, as well as gingival status (all P < 0.05).


CONCLUSIONS
The Au-Pt alloy ceramic crown is superior to Ni-Cr alloy ceramic crown in long-term clinical effects.
Department of Stomatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China. wulichun2000@sina.com
Wu
W
Li-Chun
Shi
S
Ye
Ma
M
Teng
D000293:Adolescent; D000328:Adult; D000368:Aged; D002858:Chromium Alloys; D003442:Crowns; D005260:Female; D006047:Gold Alloys; D006801:Humans; D008297:Male; D016876:Metal Ceramic Alloys; D008875:Middle Aged
D002858:Chromium Alloys; D006047:Gold Alloys; D016876:Metal Ceramic Alloys