[Effect of the shade and thickness of luting agent on the color of solidex resin].
OBJECTIVE
To evaluate the effect of the shade and thickenss of luting agent on the final color of different thickness Solidex resin in vitro.


METHODS
Five specimens of Solidex resin were fabricated at thickness of 0.5, 1.0 and 1.5 mm. The pieces of Ni-Cr alloy, two shade composite resin and opaque porcelain veneered Ni-Cr alloy were used as backgrounds. The CIE L*a*b* values of specimens were measured by a colorimeter (ShadeEye NCC) to determine the colorimetric difference, when different thickness of specimens were overlaid the different shade and thickness of luting agent at the same backgrounds.


RESULTS
The final color difference of specimens was significantly influenced by the factors of luting agent and the interaction of specimens thickness, backgrounds and luting agent(P< 0.001). Regarding the thickness of luting agent, A3 shade luting agents produced clinically unacceptable difference (deltaE*>2) in the final color of Solidex specimens at the thickness of 0.5 mm. Regarding the shade of luting agent, the color difference was more than 2 when the Solidex specimens at the thickness of 0.5 mm or 1.0 mm were against the 0.2 mm thick luting agent.


CONCLUSIONS
The final color of thinner Solidex specimens was significant affected by the change of the shade and thick of luting agent.
Xing
Wen-Zhong
WZ
Dept. of Prosthodontics, Dalian Stomatological Hospital, Dalian 116021, China.
Wang
Yi-Nings
YN
Chen
Xiaodong
X
D003116:Color; D003124:Colorimetry; D003188:Composite Resins; D003738:Dental Cements; D003776:Dental Porcelain; D006801:Humans
D003188:Composite Resins; D003738:Dental Cements; C113676:Solidex; D003776:Dental Porcelain