Tools for insertion of a spinal implant and methods of using same
A surgical tool for use with a drill bit to prevent skiving at an implant insertion site on a bone includes a cannulated sleeve having a distal end defining a burr surface. The distal end may be detachable from a body of the cannulated sleeve. The tool may be used with more than one distal end, each of the distal ends defining a burr surface having a different cutting surface from the others. The tool may form a system that includes the drill bit.
1. A method of preparing an implant insertion site on a bone, the method comprising:
advancing a surgical system along an insertion axis, the system including a cannulated sleeve having a burr surface at a distal end and a drill bit disposed within the cannulated sleeve;
rotationally coupling the cannulated sleeve and the drill bit with a lock; and
rotating the cannulated sleeve about the insertion axis to cause the burr surface to contact a surface of the bone that is not perpendicular to the insertion axis to form a pocket in the bone.
2. The method of claim 1 , further comprising drilling a hole into the bone at the pocket by rotating the drill bit.
3. The method of claim 1 , further comprising the step of retracting the cannulated sleeve.
4. The method of claim 1 , further comprising the step of disengaging the lock and retracting the cannulated sleeve relative to the drill bit.
5. The method of claim 1 , wherein the pocket formed has a substantially rounded surface.
6. The method of claim 1 , further comprising rotating the cannulated sleeve and the drill bit independent of one another.
7. The method of claim 1 , wherein the steps of advancing and rotating are performed by a robotic end effector.
8. The method of claim 1 , wherein the burr surface is annular.
9. The method of claim 1 , wherein the burr surface is bulbous.
10. The method of claim 1 , wherein the distal end is detachable from the cannulated sleeve.
11. The method of claim 1 , wherein the distal end and the cannulated sleeve are of a single monolithic construction.