Pediatric dentistry (formerly Pedodontics/Paedodontics) primarily focuses on children from birth through adolescence. The American Dental Association (ADA), recognizes pediatric dentistry as a specialty, and therefore requires dentists to undertake two or three years of additional training after completing a general dentistry degree. At the end of this training, the American Board of Pediatric Dentistry issues a unique diploma (Diplomate ABPD). Some pediatric dentists (pedodontists) opt to specialize in oral care for children with special needs; specifically children with autism, varying levels of mental retardation, or cerebral palsy.