When it comes to creating the perfect smile, you need to make sure you're getting the right advice from the right expert. A lot of people get mixed up with what the difference is between a Dentist or an Orthodontist, indeed they have a lot in common but specialisation is what sets an orthodontist apart. ` What is the difference? Orthodontists are dental specialists. They specialise in the prevention, diagnosis and treatment of dental and facial irregularities to help corre