Complete cleaning and shaping of the root canal system is essential for success of endodontic treatment. Accurate measurement of working length and 3D obturation till the apical constriction is necessary for ensuring fluid tight seal. One of the disadvantages of overextended root canal obturations is post-operative pain. The treatment options in such cases are endodontic surgery to remove the extruded filling material or Intentional Replantation. This case report discusses the advantages of Intentional Replantation and the procedure involved in endodontic retreatment of a mandibular molar with this technique.