The image above show two arches made with the same powder but with different techniques. Two test samples to indicate the issues related to internal shadowing as metallic oxides are used to color dental ceramic materials. After the fourth firing I stopped working as these samples as show the effects I was pursuing. On the left you can see shadowing withing the ceramic. Metallic oxides are not transparent, none are, they are one hundred percent opaque. The made from metals. What faces you is a particle that reflects its color. The flip side it is casting its shadow. That is not transparent lost. Light does not past through the particles. By mixing them with transparent ceramic powders, clear the mass-intensity ration disperses them. But a footprint within the ceramic matrix exists. By showing typical layering you can see streaks, very faint but quantity leaves shadowing. That foot print is always left and this lowers the value of the chosen color and the translucency.
The test sample on the right has been made with micro-layering and a different technique in how metal oxides are dispersed. This requires extended firing cycles so micro absorption generates with no boundaries and no interfaces are created. Light passes through. This is the base process of High-T. This cannot be done with stain and glazing techniques.
Standard Vita Bleach shades BL1, BL2, BL3, BL4 and A1 to D4 are the standard based shades that basically all dental restorations have conformed to for many years. That means opaque materials are used first which defines the term adaptive ceramic techniques. We no longer do that, we are now using subtractive techniques meaning translucency is priority in how much light can pass through a restoration at any given point with luminosity being how much brightness can be developed from the entire construction. This then increases controlled overall light generation.
As Bleach shades are configured basically mainly from white oxide pigmentation with a basic whitish enamel for the incisal gives little contrast difference, subtractive techniques now pave a new dimension in how opacity can be reduced to match natural light transmission as found in natural dentition. The optical appearance of white then can be controlled far easier as the hybrid interpretation of a bleach shade as a modern tooth concept that is popular in America which often looks opaque in most lighting conditions is improved.
In 2025 and now back in America we decided to reconfigure Bleach shades to provide a better range of options related to how one can choose bleach shade appearance by focussing on brightness and luminosity and not just base opacity. We also focussed on how the structure of an AOX could be better developed and finished as this implant direction of technology is far more complex than standard restorative techniques. This page gives an overall understanding of what we have developed and now offering.