Management of external root resorption following replantation after accidental tooth extraction using regenerative endodontic procedures: a case report

Accidental extraction of the wrong tooth can lead to complications such as external root resorption (ERR) after replantation. This case report describes the management of an 11-year-old female patient with ERR in a replanted mandibular first molar (#36) following iatrogenic extraction. Regenerative endodontic procedures (REPs) were employed, including chemical disinfection, intracanal calcium hydroxide medication, blood clot induction, and the placement of Biodentine™. Follow-up over 24 months showed resolution of clinical symptoms, arrest of root resorption, healing of periapical lesions, and complete apical closure. Cold pulp testing yielded positive results after 12 months, confirming regenerative response. This case highlights the potential of REPs as a biologically based approach for managing complex endodontic conditions involving root resorption, even in mature permanent teeth. It contributes to the growing body of evidence supporting REPs as a viable option in the treatment of tooth avulsion.