I don't have teeth but I have seen more practitioners of the dental arts in the past 18 mo than I have the rest of my lifetime, I think. When I smoked, I checked smoker (TBH, I sometimes did not DARE to write my "amount") and would discuss it, same with vaping.
My Oral Surgeon actually replaced an implant that had gone bad for free, after I started vaping, since my mouth was so much healthier.... Which was nice of him to do, he commented before I could say "I switched to VAPING!!!!" (LOL, most of my docs were just as excited as me).
Yes, nicotine can slow healing, but nothing like tar, man. The big thing with vaping I think is the suction, if you are having work done, not so much the nic. Though I am a proponent of, fan of, and used frequently after surgeries, of nasal vaping due to the suction. That way, no nic went into my mouth and there was not suction. Very easy with a MTL setup and a resin drip tip. Your nasal passages actually absorb a lot of nic. Did that with smoking too, back when I was, but it was a lot more complicated.
I think it was my periodontist who said that vaping was far better than smoking, but that keeping my dentures in all the time to protect my implants from vape was a good idea and whatnot. So, it's better for the gums, but not perfect?
Anna