[A comparison of color space of Vitapan 3D-Master shade guides to nature teeth from Nanjing population].
OBJECTIVE
To study the fitness of color dimension between Vitapan 3D-Master shade guides and nature teeth.


METHODS
2,159 nature teeth from Nanjing population and Vitapan 3D-Master shade guides were analyzed by dental chromameter ShadeEye NCC on CIE L*a*b* color system.


RESULTS
1) The color dimension of natural teeth displayed a broader range than those from Vitapan 3D-Master shade guides. Comparing with incisor group, canine-premolar group had better fitness with Vitapan 3D-Master shade guides. 2) In color space, incisor values a* shifted toward green (-a*), while the shade guide values a* located toward red (+a*). The shade guide lacked tabs of values L* 71-78 and a* -1.5-(-)0.2 for natural incisor. 3) According to the perceptibility threshold AE*ab<1.4, the match rates with Vitapan 3D-Master shade guides was 33% in incisor group and 50% in canine-premolar group.


CONCLUSIONS
Vitapan 3D-Master shade guides had inferior match with nature teeth from Nanjing population, especially in incisor.
Zhou
Xiao-Lu
XL
Dept. of Prosthodontics, Stomatological Hospital Affiliated School of Medicine, Nanjing University, Nanjing 210008, China.
Luo
Xiao-Ping
XP
Liu
Xia
X
D003116:Color; D006801:Humans; D007180:Incisor; D008963:Molar; D017797:Prosthesis Coloring