[Effect of three backgrounds on the final color of Solidex with six different thickness].
OBJECTIVE
To analyze the final color of Solidex in six thickness interacting with three different backgrounds.


METHODS
Five specimens of Solidex in each shade A1, A3, and C2 were fabricated at thickness of 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0 mm. The CIE L(*)a(*)b(*) values of specimens were measured using a colorimeter (ShadeEye NCC) to determine the colorimetric difference, when the specimens overlaid on different backgrounds.


RESULTS
When the thickness was more than 1.8 mm, the color difference (DeltaE(*)ab < 1) was not perceived by human observers. When the thickness was 1.4 mm or less than 1.4 mm, the color difference (DeltaE(*)ab > 2.72) was considered clinically unacceptable between alloy background and two types of composite resin background.


CONCLUSIONS
Alloy background had more evident influence on the final color of Solidex than composite resin background. When making metal-free crown restoration using Solidex, it was advisable to make the composite resin more than 1.8 mm thick.
Xing
Wen-zhong
WZ
Department of Prosthodontics, Dalian Stomatological Hospital, Dalian Liaoning 116021, China.
Wang
Yi-ning
YN
D002858:Chromium Alloys; D003188:Composite Resins; D003442:Crowns; D017797:Prosthesis Coloring
D002858:Chromium Alloys; D003188:Composite Resins; C113676:Solidex