Conspiracy theories aren’t your doctor being wrong. It’s going home, testing a tooth, then mentioning it to your doctor and he says “that’s just what they’d like you to believe” and then comes up with an even more bizarre explanation for why your tooth dissolved, or just dismisses you as a shill for big cola.

I suspect your dentist in this case would just say “oh, I guess I heard that at some point and never thought to actually check it.”