A prosthodontist is a dentist that has gone for further studies to treat and manage dental and facial issue that involves the replacement of missing teeth and the restoration of damaged teeth. They are highly trained in cosmetics, dental implants, temporomandibular disorders and many more.
In general, a patient will look to a prosthodontist if there are very complex problems, for example, severe jaw misalignment. If you do not have a complex issue, a general dentist should be able to help with your dental issues.
For more aesthetic options, it is important for patients to be able to see work that the dental professional has done rather than rely on paper qualifications.