Traumatic dental injuries (TDI) are the most frequently occurring injuries to the oral region. It has been shown by Petti et al. in 2018 that 1 billion living people in the world today have been subjected to TDI. The prognosis for some TDIs depends on correct, early emergency management at the place of the accident and at the clinic. This chapter presents how to diagnose, classify, and treat TDI with emphasis on the emergency phase. An overview of pulpal and periodontal healing and complications after TDI is also given.