Preservation of primary teeth is essential for the space maintenance till the eruption of permanent teeth. So, endodontic treatment is done for the same purpose. Various obturating materials have been introduced for the root canal filling of primary teeth but none could match all the ideal properties of the material. The main aim of the clinician should be to fill the root canal with material which could match maximum requirements of the ideal properties.

Clinicians are regularly confronted with different choices after failure of root canal treatment. In present scenario patient prefer to retain their original teeth thats why non-surgical retreatment should be the treatment of choice. The new generation of endodontic instruments, magnification, materials and  technology with the basic principles of endodontic retreatment have helped in retention of the patients natural tooth structure to form and function decreasing the need for extensively expensive prosthetic replacement in the area of implant dentistry. Surgical approach can be adopted in obstructed, calcified or non-negotiable canals.