Abstract:

BACKGROUND: Color is an important sign to test whether the restoration is successful during dental repair.
OBJECTIVE: To compare the color ranges of three kinds of shade guides under three different lights, and compare these color ranges with that of Chinese teeth.
METHODS: Chroma values of Vita Classial, ShoFu Vintage and Ivoclar Chromascop shade guides under different lights were collected and measured by digital camera and computer software on International Commission on Illumination 1976L*a*b*color system.
RESULTS AND CONCLUSION: Vita Classial shade guide was lack of red and yellow shade chips with large saturation because of its low a* value and narrow a* and b* value ranges. ShoFu Vintage and Ivoclar Chromascop shade guides were lack of color chips with lower b* value which was blue shade chip with small saturation. Chroma values of each shade guide under different lights changed, the difference between natural light and fluorescent light was reflected in lightness, while the differences between stage light and natural light or fluorescent light were reflected in lightness and chroma.