Abstract: Objective: To investigate the long-term prognosis and influencing factors of autologous tooth transplantation after root development. Methods: 64 patients and 72 teeth with autologous tooth transplantation after root development were retrospectively chosen from January 2008 to January 2015 and the related clinical data and apical X-ray film were reviewed after operation. The influencing factors of clinical prognosis were analyzed according to age, sex, and root canal therapy experience. The 5-year cumulative survival rate and success rate of transplanted teeth were evaluated by Kaplan-Meier method and Log-Rank method. Results: The 5-year cumulative survival rate and cumulative success rate of 72 teeth with autologous transplanted teeth were respectively 83% and 65%. There was no significant difference in the cumulative survival rate and success rate between patients with age < 27 years old and ≥27 years old (P>0.05). There was no significant difference in the cumulative survival rate and success rate between patients gender (P>0.05). There was no significant difference in the cumulative survival rate between patients with or without root canal therapy (P>0.05). However, the success rate of patients with root canal therapy were significant higher than patients without root canal therapy (P<0.05). Conclusion: Autogenous tooth transplantation after root development possess good clinical prognosis and can be used as the important candidate for the restoration of missing teeth. Improving root canal therapy after operation is helpful to higher the long-term success rate of tooth transplantation.

Key words: root, autogenous tooth transplantation, prognosis, influencing factors