an instrument for removing a crown by generating a couple of forces between the occlusal surface of the stump of the tooth and the basal surface of the crown . the instrument has an indented intermediate portion and a working part extending from a tapered intermediate portion and a handle . when inserted in a groove formed at the occlusal part of the stump along a plane substantially parallel to the occlusal surface of the crown , the working portion enables , by a physical action , exertion of a couple of forces between the respective occlusal surfaces of the stump and the basal surface of the crown . the working part is rotatable integrally and correspondingly with a rotation of the handle .