Patent ID: 6796797
Filing Date: 2004-09-28
Classification: A61C

Abstract:
An instrument for removing a dental crown by being placed in a groove formed at an occlusal face of a natural or prosthetic stump of a tooth along a plane parallel to an occlusal surface of the dental crown, the instrument comprising:a handle; a tapered intermediate section extending outwardly from an end of said handle; an indented intermediate part extending from an end of said tapered intermediate section opposite said handle; and a working means formed at an end of said indented intermediate part opposite said tapered intermediate section, said working means having a size suitable for fitting in the groove, said working means for applying a couple of forces along a vertical axis of the crown between the occlusal face of the stump and a basal surface of the crown by a physical action imparted onto said handle, said indented intermediate part having a shape and dimensions associated therewith defined so as to limit lateral forces on the crown while not hindering a vertical translation of a notched wall of the crown, said indented intermediate part rotatable integrally and correspondingly with said tapered intermediate section and said handle upon an application of a rotation to said handle, said working means being a part having an ellipsoidal cross-section or an oval cross-section or a snail-shaped cross-section.