External Cervical Resorption Treatment: Case Report and Outcome-based Strategies

External cervical resorption (ECR) is a complex dental condition that is traditionally treated with external surgical repair and nonsurgical root canal therapy as needed. This case report describes a patient with 8 teeth treated for ECR. Follow-up examination and management strategies are described, using microscopic techniques, three-dimensional imaging, and bioactive root filling materials. The chosen techniques were based on the severity of ECR, root location, defect geometry, and management of the portals of entry. Access to the external resorption defect was achieved through the root canal system, while considering the potential need for later external surgical repair. Materials were chosen for root filling and defect repair based on viscosity, bioactivity, physical strength, and handling properties. The treatment protocol included multiple visits to ensure definitive lesion debridement, root sealing, and material setting. The case highlights stable healing in different types of ECR defects. From a restorative perspective, posts were considered undesirable, because they could interfere with bioactive material placement, particularly in cases where later revision is required. This case supports a systematic treatment approach for saving teeth with ECR that were previously considered candidates for extraction.