External Cervical Resorption (ECR) is a highly aggressive, insidious, and non-bacterial form of dental tissue loss that begins on the external root surface just below the epithelial attachment. Despite growing clinical awareness, ECR remains a diagnostic and therapeutic challenge in modern endodontics because it typically progresses silently without early symptoms. If left untreated, ECR causes extensive destruction of dentin, eventually threatening the pulp and leading to to