Orthodontics is the treatment of irregularities in the teeth and jaws. Orthodontic misalignments, called malocclusions, can indicate a number of different conditions. Inherited malocclusions include jaw growth problems, congenitally missing teeth, extra teeth, crowded or protruded teeth and spacing problems. However, the premature loss of baby teeth, retention of baby teeth, thumb- or finger-sucking, accidents and certain types of dental disease can also result in a need for orthodontic treatment.