Management of Cervical Root Resorption on the Palatal Aspect Using Combined Internal and External Surgical Approaches: A Case Report Study

External cervical resorption (ECR) is a progressive disease that occurs at the cervical region of the tooth, developing beneath the epithelial attachment. ECR is often asymptomatic and detected in routine radiographic examinations. This condition can significantly impact the long-term survival of the affected tooth. Therefore, early diagnosis and proper management are both crucial and challenging. We reported a case of ECR, managed through a synchronized and simultaneous treatment approach combining surgery and root canal therapy. The defect was restored with resin-modified glass ionomer. Nine-month clinical and radiographic follow-up showed satisfactory healing with no signs of recurrent resorption, and the tooth remained asymptomatic and functional.