By the Glossary of Dental Clinical terms from the ADA, American Dental Association,

 

"Prosthodontics is the dental specialty pertaining to the diagnosis, treatment planning, rehabilitation and maintenance of the oral function, comfort, appearance and health of patients with clinical conditions associated with missing or deficient teeth and/or oral and maxillofacial tissues using biocompatible substitutes."

 

It Specializes in the cosmetic restoration and replacement of teeth.