Years of Specialized Training Beyond a Four-Year Dental Level. Pediatric Dentistry - Dental health care demands of infants and also youngsters via teenage years-- Education lasts 25 months after dental school Endodontics - Health of dental pulp, the soft core of teeth, specializes in carrying out root canals-- Education lasts 26 months after oral school Periodontics-- Deals with conditions of the periodontal cells and also bone sustaining the teeth-- Education lasts 35 months after dental school. Orthodontics as well as Dentofacial Orthopedics-- Remedying oral as well as facial abnormalities-- Schooling lasts 30 months after dental institution. Prosthodontics-- Bring back natural teeth or changing missing teeth or dental structures with man-made gadgets, such as dentures-- Schooling lasts 32 months after oral institution.