The yes/no decisionWith the Toothguide 3D-MASTER, shade taking is no longer subjective. Shade determination using this tool simply involves three systematic steps that everybody can learn.Step 1: Lightness (Value)First, use the top row of teeth on the Toothguide (1M1, 2M1, 3M1, 4M1, 5M1) to determine lightness level, making a simple yes/no decision as to whether the Toothguide tooth matches.Step 2: Colour Saturation (Chroma)In the second step, determine the color saturation (chroma) following the same principle by spreading the samples out like a fan.Step 3: HueFinally, check whether the natural tooth is more yellowish (L) or more reddish (R) than the Toothguide sample. By following these three steps you can determine the natural tooth shade faster and reliably.