A Retrospective Study of Replacement Resorption and Its Risk Factors After Replantation of Avulsed Young Permanent Teeth.

OBJECTIVE: A retrospective study was conducted on 30 cases of replacement resorption after replantation of avulsed young permanent teeth with clinical observation period of more than 2 years, to provide reference for clinical treatment and prevention. METHODS: A retrospective study was carried out on 30 cases replacement resorption after replantation of avulsed young permanent teeth with replacement resorption. The clinical and imaging data during posttraumatic follow-up were recorded and analyzed, including trauma age, gender, traumatic tooth position, root development stage, time of tooth separation, storage media, fixed time, and clinical examination. RESULTS: Among the 30 cases, the fastest replacement resorption occurred in the first month after trauma (1 case), and the slowest occurred in the 24th month (1 case). The incidence of replacement resorption was 26.7% at month 3, 70% at month 6, 90% at month 9, and 96.7% at month 12. Fifteen patients showed progressive ankylosis, the degree of ankylosis gradually increased. Analysis and screening of risk factors found that the extraoral time was statistically significant. CONCLUSION: The study shows that the longer the time in vitro, the more likely progressive tooth sinking will occur, resulting in tooth loss. Therefore, it is more important to popularize the emergency treatment of mean avulsion. How to correctly deal with prolapse teeth, how to optimize the emergency trauma channel, reduce the occurrence of delayed replantation, and prolong the life of replantation teeth will be the focus of the future work of pediatric stomatologists.