[Influence of repeated sintering on the color of two brands of porcelain-fused-to-titanium].
OBJECTIVE
To investigate the influence of repeated sintering on the color of two porcelain-fused-to-titanium, and the differences between the two porcelains.


METHODS
Thirty samples were prepared and sintered for 9 times. The color of samples were measured following sintering 1, 3, 5, 7, 9 times by ShadeEye NCC colorimeter according to two brands of porcelains with CIE1976L*a*b* color system, and calculated relevant chrome, chromatism and hue, and statistical analysis.


RESULTS
When two brands of porcelains were sintered 5 times, the color parameters had no significant change and sintered continuely, the color parameters of L* and a* had obvious changes, but can't be observed by eyes.


CONCLUSIONS
The color parameters of titanium-porcelains have no significant change after repeated sintering.
Shu
Cheng-jun
CJ
Dept. of Prosthodontics, The Affiliated Stomatological Hospital of Nanjing University, Nanjing 210008, China.
Luo
Xiao-ping
XP
Wu
Lie
L
D003116:Color; D003124:Colorimetry; D003776:Dental Porcelain; D006801:Humans; D016876:Metal Ceramic Alloys; D014025:Titanium
D016876:Metal Ceramic Alloys; D003776:Dental Porcelain; D014025:Titanium