Root resorption of the tooth may be a pathologic or physiologic process resulting in loss of root dentin and cementum. Broadly, it can be of two types – external and internal root resorption. The location of these resorptions can vary. Internal resorption is relatively a rare resorption in which resorption begins in the root canal and destroys surrounding dentalhard tissues. It is caused by transformation of normal pulp tissue into granulomatous tissue by giant cells, which resorbdentin. Thepresent article describe the management of internal resorption involving mandibular premolar with internal root resorption with 1 year follow‑up