Treatment of external root resorption with Biodentine in a tooth with a periodontal pocket: a case report with 2-year follow-up

External root resorption is characterized by the loss of mineral tissues in the dental root. This condition is difficult to diagnose, and if not identified early, it can lead to tooth extraction. The treatment consists of surgical access, removal of granulation tissues, and sealing the area with a biological material. Objective: This article reports on the treatment of ERR in the middle third of the root, associated with an 8 mm periodontal pocket using Biodentine, with a two-year follow-up. Case report: A 57-year-old woman attended complaining of discomfort in the palate. After a thorough medical history, clinical, radiographic, and tomographic evaluation, the final diagnosis was External Root Resorption. Concerned about preserving the tooth, it was suggested to fill the resorption with Biodentine and regular follow-ups. The patient agreed, and a tissue flap was raised in the palatal region, followed by sealing of the perforation with Biodentine and suturing. After 7 days, the sutures were removed, and during the six-month and two-year follow-ups, the tooth exhibited no mobility, good periodontal health, and maintained its function. Conclusion: The case demonstrated a reduction in the periodontal pocket (from 8 mm to 4 mm), maintenance of the tooth, and the effectiveness of Biodentine in treating ERR, even when exposed to the oral cavity.