The American Dental Association recognizes a cosmetic dentistry expert or prosthodontist as the only dental specialist specifically trained to replace missing teeth, diagnose and treat bad bites while creating new smiles. A cosmetic dentistry expert goes through three years of advanced postgraduate training at an accredited dental school where he or she receives certificates in fixed, removable and maxillofacial prosthodontics. Most cosmetic dentistry experts also complete a master’s degree in dentistry and dental materials science.