Abstract: Objective: To elaborate the correlation between post-traumatic treatment factors and the success of dislocation tooth replantation. Methods: The samples that used to analyze the relation among preservation medium, time, and treatment outcomes were selected from 90 patients in our hospital due to trauma from January 2015 to January 2017. Results: Children from six to twelve were at high risk of tooth dislocation. The most common causes of tooth dislocation included falling on the ground(44.4%)and traffic accident(35.5%). The replantation success rate of immature tooth (80.36%) was higher than that of the mature tooth (59.15%). The success rate (91.49%) of replantation within 30 minutes after injury was higher than those within 30min-2h (68.89%) and 2h (37.14%) after injury. The success rate of tooth stored in milk (93.02%) was higher than that stored in physiological saline (70.00%), kept in patients’ oral (68.18%), and stored in dry medium (34.38%, P<0.05). Conclusion: The best prognosis could be achieved by performing the replantation within 30min after tooth dislocation. The success rate of tooth replantation could be improved by keeping the tooth in milk after the trauma. The success rate of replantation of undeveloped teeth was higher.

Key words: Tooth avulsion, Tooth replantation, Storage medium, Dislocation time, Trauma