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My workhorse ingot is the LT with a little more now going to the value shades (V1, V2, V3). The issue with the HTs is that they were developed to be an inlay, onlay and veneer material. Because of this, they do great with thin resorations (<1mm). As the HTs get thicker (especialy >1.5mm) they tend to go grey due to their translucency and the darkness of the oral cavity. SOMETIMES, you can get away with going a shade or two lighter/brighter to couneract this effect, but not always.