The Esthetic Guide (US Patent 2004) and the Visual Elements Technique was developed to support Translucency, Value, then Color (hue and chroma) as the proper language for tooth description. Present language Value, Hue, and Chroma was
designed for industry 100 years ago and was never designed for dentistry, we need a language based on the science of illumination.
Light is energy and it is mainly transmitted or reflected by tooth structure. Reflected light stimulates our vision and we see brightness, we call this Value. UV Light conversion (fluorescence) and refraction (Opalescence) also create brightness. Color is produced only by some of the reflected light , value is the measure of overall energy of a tooth and more important than color. We measure value with a solid tab of material, not a layered tab with 3 different zones.
A true 3-Dimensional language must include Translucency. The passage of light through teeth allows us to sense the 3-dimensional world of depth and volume. The use of translucency in the layering process allows us
to create formations within the space of a restoration. The strength of dentin, mamelon and enamel
formations and patterns depend on the translucent and opaque level of the materials used. The more
the difference in translucency/opacity between two materials the more definite the pattern or formation.
Translucence is more important than color for reproducing tooth patterns and structures.
Translucency and Value indicate the energy level of the teeth, and its distribution pattern. Both are more important features of tooth appearance than color. This information must be given to the ceramist to determine the proper use of materials and layering techniques to produce a crown that matches what the dentist sees.