Yes I had a dentist who told me all of a sudden "you need 3 crowns" and I was like "bwah?" . Just 6 months before I was notified he was happy I hadn't had a cavity the 6 years I'd been seeing him. Naturally I went to another dentist who told me my teeth were fine and to not go back to the other dentist for anything let alone crowns but he said that was just his opinion as he didn't know the dentist personally. So I switched over to him. He took the time to point out on xrays from people who had decay bad enough to get crowns and that my teeth were nothing like those.