Are you using a blue translucent or opalescent incisal to mimic the new bleached tooth shades?
Bleached teeth are very difficult to match, unless of course you are doing more than one tooth. When teeth are bleached, most of the organic colorants from years of staining are taken out of the teeth. If youve gone through the process of bleaching, you know that the gel in the bleach usually stops short of the gum tissue to prevent any irritation in that area. Since there is usually still a little color at the neck, it helps us know what opaque to use underneath the dentine colors. I apply a very thick incisal layer on top of the dentine layer. To date, Ive never had to apply a blue layer on any of my crowns (now Ill have one tomorrow). Then, if theres room, I usually apply a thin and slightly whiter opalescent layer on top of the more translucent incisal layer. Yamamoto describes this layering effect as reverse opalescence, while Hegenbarth describes it as a layer that blocks out light because of its small particle size (the nature of opalescent porcelains). Because opalescent porcel