It is a natural situation for most. Of course smoking, coffee etc doesn’t help but here is some info about it:
from the net: Teeth discoloration can be caused by a variety of factors. Most commonly, tooth darkening occurs as a natural effect of aging. As we get older, the outer hard tissue covering our teeth, called enamel, wears away and exposes the darker dentin beneath it. This can cause our teeth to appear more gray or yellow rather than white.
Remember too alot of people now have veneers etc. and their teeth will never discolor so their teeth will have that pearly white look…but real natural teeth are gonna change as we age…nothing we can do about that, oh wait, yes, we can veneer them LOL
A little surprised your dentist kinda didn’t give you a real life aging factor and how our teeth do change but also…when your teeth looked darker against your fake tooth in their, then it caught her attention and she asked about smoking…I get that.
I have a few fake ones and one of them is one of my very front tooth that I murdered on a ski trip LOL and got a fake one. My ‘real front tooth’ is a tad darker than the fake one for sure now but also, the fake one has that ‘darker black’ coloring going around the gum line…and I asked my dentist and he said it was just the fake tooth and the normal aging of the cement etc that anchors that tooth in there and more goobly gook he said on it…but he said only way to fix it is pull the fake tooth, fit out a new one, and just put in a new one and I am like, damn…the cost of that? ugh, so I am just living with it and forgetting it for now