[Effect of thickness and shade of porcelain of ceramometal restorations on color of gingival porcelain].
OBJECTIVE
The purpose of this study was to evaluate the color changes of gingival porcelain through varying thickness and shade of porcelain of ceramometal restorations.


METHODS
In this study a spectrophotometer (PR-650) was used for color analysis. The color changes of dentin porcelain and gingival porcelain with three varied thickness (0.3 mm, 0.6 mm and 0.9 mm) were investigated. In addition, the color variances of Shofu vintage porcelain shade A2, A3 and B2 were tested.


RESULTS
The results showed that decreased L * value of ceramometal restorations and increased a * value were due to the increase of the gingival porcelain thickness, color measurements showed the same trend as the increased dentin porcelain thickness and the opaque and dentin porcelain with different color affected the appearance of gingival porcelain.


CONCLUSIONS
The color of gingival porcelain would be changed with the differences of thickness and shade of porcelain of ceramometal restorations.
Sun
Jun
J
Key Laboratory of Oral Biomedical Engineering Ministry of Education, Sichuan University, Chengdu 610041, China.
Luo
Yun
Y
Chao
Yong-Lie
YL
D003116:Color; D003776:Dental Porcelain; D006801:Humans; D017797:Prosthesis Coloring; D013053:Spectrophotometry
C096474:Vintage Porcelain; D003776:Dental Porcelain