The prognosis and regression of children after anterior dental trauma depends largely on their developmental status and the severity of the trauma caused by the trauma, if treated promptly and reasonably. Generally speaking, after dental trauma, due to the injury to the dental tissues and the apical tissues as well as the pulp, the following two aspects of regression may occur: first, trauma-induced occult cracks in the hard tissues of the tooth, which may lead to staining of the tooth surface or fracture of the crown and the root; second, trauma-induced injury to the periapical tissues and the pulp, which may lead to bleeding, calcification, or even necrosis of the pulp. Internal and external resorption of the root may also occur. Among the above listed injuries, pulpal necrosis is the more common outcome and often requires timely root canal treatment to avoid more serious consequences. Then, the various prognoses mentioned above are different for different age groups and different stages of tooth development. Generally speaking, the younger the age, the looser and softer the alveolar bone is relatively, the better the cushioning, and the less damage to the hard tissues of the tooth; the less mature the tooth development, the coarser the pulp tissue of the apical foramen, the stronger its healing ability, and the less likely to have pulpal necrosis. In addition, the daily maintenance after trauma also has a certain influence on the prognosis. First, the affected tooth should not be used for chewing and vigorous impact within a specified period of time (generally 2 weeks) to give periodontal tissues some time to heal; second, strengthen oral hygiene, especially near the gingival margin of the affected tooth, and use mouthwash appropriately; third, follow up in strict accordance with the requirements and long-term follow-up.