Pulpectomy is the treatment of choice in primary teeth that facilitates complete removal of necrotic pulp followed by filling with inert resorbable material. A major requirement for a successful root canal treatment of primary teeth is that the root canal filling material must possess the necessary properties of being antibacterial,  resorbable at the same rate of the root and harmless to periapical tissues and the  developing tooth bud.  In addition, it must easily fill the canals, adhere to the walls, should not shrink and must readily resorb if passed beyond the apex, be   easily removed if necessary, must be radiopaque and causes no discoloration of  the tooth.