Traumatic dental injuries (TDIs) occur frequently in children and young adults, comprising 5% of all injuries. Twenty-five percent of all school children experience dental trauma and 33% of adults have experienced trauma to the permanent dentition, with the majority of the injuries occurring before age 19. Luxation injuries are the most common TDIs in the primary dentition, whereas crown fractures are more commonly reported for the permanent teeth. Proper diagnosis, treatment planning and follow up are important to assure a favorable outcome. These updates of the International Association of Dental Traumatology's (IADT) Guidelines include a review of the current dental literature using EMBASE,MEDLINE, PUBMED, and Scopus searches from 1996 to 2019 and a search of the journal Dental Traumatology from 2000 to 2019.