ADDITION:

I can already hear people saying that the teeth are greyish - yellowish, and not BRIGHT WHITE.

Well, all those are WRONG!

Take a close look at your own teeth! You'll find out that they are not bright white.

Instead, they are more on the yellowish / brownish or greyish side, or something in between all that. And this has been a thing that had always disturbed me, besides the fact that the teeth of most standard figures look more like piano keys rather that actual teeth...

In dental prosthetics there are 4 basic shapes to choose from, plus a variety of lengths and widths. In addition to that, each single tooth can be modified individually to match them to their future owners physiognonomy.

Only beginners would use full-white, square teeth for a denture, and everyone can see immediately that the person has false teeth. I can see that on almost every render I see today in any gallery, and it freaks me out every time.

.

To prove it to yourself, just make your figure smile, showing her teeth. Then make a portrait render before / after applying the new shader, and compare.

I bet it will convince you...

K