As in any profession, most dentists have been well-trained, but few have either the natural skills, the commitment to excellence in every case, or the desire to continuously learn about new materials, techniques, and technologies. If you need the best, you should read online reviews, while being aware they may not reflect the broad experience of patients. Discuss your goals with friends whose smiles you admire and are very happy with how their oral health challenges have been resolved.
And if you need a cosmetic dentist, talk to the office manager for a top specialist, such as an orthodontist, who they recommend. If you need a specialist, consult with a general dentist you know has a great reputation. Then set up multiple appointments to find out which of your final candidates listens carefully to what you need, explains in detail several good options, and does not pressure you for an immediate decision.