regular cleaning at dentist, they are what they are, caps crowns & all.
Ditto!
When I see excessively white teeth on middle aged folks I always wonder if they are caps or implants. 8)
I think good oral hygiene is important to your overall health.
When I smoked with filters on everything I learned which tobacco really stained my filters ergo my teeth. I still use carbon filters for really moist aromatics. Most Va's and VaPers unless they are really strong do little staining on a filter so I would deduce not so much tooth stain.
Looking back to the period when I did not smoke shows plainly, in my case, coffee is by far a bigger offender.