Endodontic treatment involves the pulp of a tooth. It also contains blood vessels that give the tooth oxygen and nutrients. When the pulp is injured or infected, endodontic treatment is often done to try to save the tooth. Endodontic treatment can be done in adult (permanent) or baby (primary) teeth. Even though baby teeth eventually will fall out, your dentist will suggest fixing them unless they would normally fall out soon. Baby teeth are important for chewing and speaking.Your child may have some soreness after endodontic treatment.