Pulp canal obliteration occurs due to many factors like trauma age systemic factors long standing low grade stimulus etc. There are various challenges during endodontic treatment of such canals due to which iatrogenic errors can occur during negotiation and locating the canals or during cleaning and shaping of such canals. This article presents two case reports of the management of partially obliterated root canals due to long standing low grade stimulus and ageing using ProGlider and Hyflex CM NiTi rotary instruments.