Like so many professions and contractors, most of the ones that over advertise are hurting for business for some reason.
Best most of the time if you get referrals by word of mouth. One dentist I recommend is Dr. Nagle
https://www.naglefamilydentistry.com/ in one of the Fair Oaks Hospital professional buildings. Very happy with his service, also caring and patient, office staff very good to work with. Also the hospital is right next door should a medical condition require dentistry under surgery.
So many medical professionals in this area, due to its high per capita income. Go to the rural areas of Virginia, West Virginia, and other places, the number and quality of doctors is lacking. Sure, the doctors there can take care of basic ailments, but anything more extensive some of my relatives back there have to go to the bigger cities for care, or suffer from lack of care.