# Management of External Root Resorption following Replantation After Accidental Tooth Extraction Using Regenerative Endodontic Procedures: A Case Report

## TL;DR

A case report shows successful treatment of root resorption in a replanted tooth using regenerative endodontic methods in an 11-year-old patient.

## Contribution

Demonstrates the effectiveness of regenerative endodontic procedures in managing root resorption after accidental tooth extraction in a mature permanent tooth.

## Key findings

- Regenerative endodontic procedures led to arrest of root resorption and healing of periapical lesions over 24 months.
- Positive cold pulp testing after 12 months confirmed a regenerative response in the treated tooth.
- Biodentine™ and intracanal calcium hydroxide contributed to successful apical closure and symptom resolution.

## Abstract

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.

Key words:External Root Resorption, Regenerative Endodontic Procedures, Accidental Tooth Extraction.