Here is what happens in the lab:
The prescription calls for T4 V3 A3…a simple variation of A3
This is asking for a slightly translucent and slightly darker A3 so starting with the opaque or ceramic core we can make logical decisions…
(1)
(2) (3)
Generic A3 build-up Opaque is modified Amount of Opaceous Darker than Standard Enamel
Opaceous dentin to reduce value and dentin is reduced. is used to reduce brightness
Dentin reduce energy level Dentin is modified to V3
Opal Enamel with clear for full Opal enamel is too bright body contour
