An Anatomical Intraradicular Retainer Fabricated Using a Putty Index: A Case Report

Post-endodontic restoration is a complex process that requires careful consideration of multiple factors, with the primary goal of restoring function, esthetics, and structural integrity while preventing microleakage and root fractures. The choice of restorative approach depends largely on the remaining tooth structure. In the present case, a severely weakened endodontically treated tooth with significant loss of radicular dentin was rehabilitated using a customized anatomic fiber post technique. After completion of root canal therapy, the post space was prepared, and a fiber post was relined with composite resin to closely adapt to the canal morphology, ensuring optimal fit and stress distribution. This was followed by core buildup and definitive full-coverage restoration, resulting in satisfactory functional and esthetic outcomes. The use of anatomic posts demonstrated a favorable prognosis, particularly in fragile roots, by enhancing retention, minimizing cement thickness, and reducing the risk of root fracture. This case highlights that individualized post adaptation is superior to conventional prefabricated posts in compromised canals, emphasizing the importance of preserving remaining dentin, achieving proper post adaptation, and selecting materials that mimic the biomechanical properties of natural tooth structure as key learning points for long-term success.