Patent ID: 8454361
Filing Date: 2013-06-04
Classification: A61C

Abstract:
1. An endodontic device, comprising: a shank configured for attachment to a motor to rotate the shank; a tapered body extending from the shank, the tapered body having a tip end and a shank end and a working surface extending between the shank end and the tip end, wherein the tip end has a diameter that is less than a diameter of the shank end, wherein the body has an axis of rotation, wherein a length of the tapered body extends from the tip end to the shank end with the tapered body being substantially straight along its length when at rest, the tapered body comprising a plurality of transverse cross-sections and having a longitudinal axis defined by a centroid of each transverse cross-section, wherein said each transverse cross-section is symmetric, wherein a first centroid of a first transverse cross-section that intersects the working surface along the length of the body is on the axis of rotation and a second centroid of a second transverse cross-section at the tip end is offset from the axis of rotation, wherein with no applied transverse force to the tapered body consecutive centroids of the body including the first centroid, the second centroid and centroids therebetween lie along a straight line with the tip end displaced further away from the axis of rotation than the shank end and with the tip end located no further from the axis of rotation than the diameter of the shank end, wherein the body has at least one cutting surface along the outer diameter that is configured to remove material when the body is rotated within a canal of the material.