Patent ID: 9119637
Filing Date: 2015-09-01
Classification: A61B

Abstract:
1. A drilling device for forming a channel of curved profile, the device comprising: an articulated drill comprising a tube with one end adapted to be attached to a device for driving the drill in an oscillatory movement and a second end with a series of teeth with cutting edges, the tube having between the two ends a profile deformable along a radius of curvature r, the profile comprising a succession of alternately concave and convex loops that form teeth and cooperating seats arranged on an exterior face of the profile and on an interior face of the profile with respect to an axis of the profile when the profile is deformed along the radius of curvature r, and wherein between edges of adjacent teeth and between edges of the teeth and cooperating seats are a functional play of positive axial displacement Jp, a functional play of negative axial displacement Jn, and a functional play of angulation Ja, wherein the teeth on the exterior face comprise upper teeth most remote from the interior face and adjacent teeth that are directly adjacent opposite edges of a respective upper tooth, and wherein the teeth on the interior face comprise plural notched teeth, and wherein the functional play of negative axial displacement Jn for the upper teeth is less than that of the adjacent teeth, and wherein the functional play of positive axial displacement Jp for the upper teeth is less than that of the plural notched teeth.