One of the most common dental emergencies we face are traumatic dentoalveolar lesions1. Traumatic dental injuries encompass a wide range of problems, from fractured enamel to complete tooth loss, which can have significant functional, aesthetic, linguistic and psychological effects, especially on children, affecting their quality of life and self-confidence. themselves1,2. The most common type of dental lesions is enamel. -fractures of the dentinal crown which represent 26-%76 of all lesions of permanent teeth4. In this type of injury, a fracture of the enamel or enamel-dentin occurs without involvement of the pulp5. In contrast, intrusion is a rare lesion accounting for only 0.3 to 1.9% of all permanent tooth lesions6. In this type of lesion there is an apical displacement of the tooth in the alveolar bone with an apical direction. This can cause compression of the periodontal ligament and commonly leads to a crush fracture of the alveolar bone5. Avulsion is also a relatively rare injury that represents approximately 0.5 to 3% of all dental injuries and appears to be the most serious6-8. Avulsion has been described as the complete movement of the tooth out of the socket5,9. The weakest outcomes of dentoalveolar trauma are linked to avulsion with the eventual loss of 73%-96% of the reimplanted teeth10. Therefore, avulsion is a true dental emergency and correct management at the time of the injury can determine the definitive prognosis7. External inflammatory root resorption (EIRR) is a common complication following intrusion and reimplantation6,11. The current treatment protocol for progressive EIRR involves chemomechanical preparation of the canal and placement of a long-term calcium hydroxide (CH) dressing in the canal. Despite the high success rate with this method, its adverse effects discussed in previous articles lead to...... middle of paper ......orption, we decided to perform CEM cement filling of the space root canal of tooth n. 8, 9, 10 to stop inflammatory resorption of the root. In recall visits the resorption of the external root of teeth n. 8, 9, 10 ceased and the resorption gaps were repaired with new cement without radiographic signs of replacement resorption in any of the follow-up sessions, which would suggest the potential ability of CEM cement to be used as a filling material of the root canal in immature teeth. Periodic radiographic and clinical checks are necessary to ensure long-term success. In conclusion, in this case of complicated traumatic injuries, progressive IERR was controlled using CH dressing for 3 months and then obturation with CEM cement. Therefore the success of the treatment may depend on CH or CEM cement. Further clinical studies with longer follow-up periods and larger samples are recommended.