My wife had a dentist that she dearly loved, followed her from practice to practice, BUT my wife's teeth were always problematic, I finally told her her dentist was the problem not her teeth. She changed dentists and has had very few problems since. Dentists, doctors, vets and the like are human, they go to school, some are at the top of their class and some are at the bottom. They are not god, and not all seeing, some are great some are not. Listen to what they have to say but if in doubt get a second or third opinion.