Pediatric Dentistry

"Pediatric Dentistry is an age-defined specialty that provides primary and comprehensive preventive and therapeutic oral health care for infants and children through adolescence, including those with special health care needs."

What are the key elements of this definition, that make it so unique?

"age-defined": most specialties are procedure defined (endodontics, periodontics, etc.). Pediatric dentists provide care for their specific age group of patients. There is no limitation to what type of treatment they provide.
"primary and": Pediatric dentists are primary providers. There is no need for a referral of patients. Parents can choose to have their children evaluated and treated by a pediatric dentist just like they can choose to have their child treated by a pediatrician.
"infants and children through adolescence": Pediatric dentists see patients at any age from birth up to their late teens.
"special health care needs": Pediatric dentists have the training and experience to evaluate and treat patients, that are medically compromised. This includes patients with hemophilia, leukemia, congenital syndromes, etc... No other dental specialty, other than OMS is more involved in hospital care of patients.