Surgical burs

Patent metadata

Field	Value
Publication number	US-11406396-B2
Application number	US-201916390476-A
Country	US
Kind code	B2
Filing date	Apr 22, 2019
Priority date	Aug 31, 2015
Publication date	Aug 9, 2022
Grant date	Aug 9, 2022

Abstract

A surgical bur is disclosed having cutting and trailing edges and associated flutes and lands. Each flute includes a cutting edge. Each of the trailing edges relatives in a selected dimension to a preceding cutting edge.

First claim

What is claimed is:

1. A method of dissecting a tissue generally in a radial direction from a center axis of a surgical bur, the method comprising:
powering a motor to rotationally drive the surgical bur around the center axis of the surgical bur;
moving the surgical bur in a radial direction from the center axis; and
engaging a front wall of a dissected channel with a trailing edge of the surgical bur prior to engaging the front wall with a cutting edge of the surgical bur;
wherein the surgical bur is configured to cut smoothly into the front wall.

2. The method of claim 1 , further comprising:
forming a channel in the tissue by cutting the front wall and removing tissue from the front wall.

3. The method of claim 2 , further comprising:
forming a bore into the tissue by moving the surgical bur axially along the center axis into the tissue.

4. The method of claim 1 , further comprising:
forming a bur hole with the surgical bur; and
inserting an implant into a subject through the bur hole.

5. The method of claim 4 , wherein inserting an implant into the subject through the bur hole includes inserting a deep brain stimulation probe into a brain of the subject.

6. The method of claim 1 , wherein the trailing edge is at substantially a same distance from the center axis as the cutting edge.

7. The method of claim 6 , wherein a land extending between the trailing edge and the cutting edge is spaced a second distance from the center axis of the surgical bur, the second distance being less than the first distance.

8. The method of claim 6 , wherein the cutting edge extends from a proximal bur end to a distal bur end and the trailing edge extends from the proximal bur end to the distal bur end.

9. The method of claim 1 , further comprising rotating the surgical bur at about 75,000 RPM's.

10. The method of claim 1 , wherein the trailing edge engages the front wall prior to the cutting edge beginning to cut the front wall such that the surgical bur may be substantially stabilized relative to the front wall.

11. The method of claim 10 , wherein the stabilization reduces vibration by at least about 40%.

12. The method of claim 1 , wherein the surgical bur includes a bur distal tip and the method includes dissecting axially the center axis into tissue using the bur distal tip.

13. The method of claim 1 , further comprising engaging the front wall with the cutting edge of the surgical bur to form bone chips where the cutting edge moves the bone chips towards an already formed portion of the channel.

14. The method of claim 1 , further comprising positioning the trailing edge at substantially a same radial distance relative to the central axis as the cutting edge to substantially reduce vibration upon rotation of the surgical bur.

15. A method of dissecting a tissue generally in a radial direction from a center axis of a surgical bur, the method comprising:
powering a motor to rotate the surgical bur around the center axis of the surgical bur;
moving the rotating surgical bur in a radial direction from the center axis toward the tissue;
engaging a front wall of the tissue with a trailing edge of the surgical bur; and
engaging a cutting edge of the surgical bur to the tissue after engaging the trailing edge of the surgical bur to the tissue;
wherein the trailing edge and the cutting edge of the surgical bur are each a same distance from the center axis of the surgical bur to reduce vibration of the surgical bur.

16. The method of claim 15 , further comprising:
forming a channel in the tissue by cutting a front wall and removing tissue from the front wall.

17. The method of claim 16 , further comprising:
forming a bore into the tissue by moving the surgical bur axially along the center axis into the tissue.

18. The method of claim 15 , further comprising:
forming a bur hole with the surgical bur; and
inserting an implant into a subject through the bur hole.

19. The method of claim 18 , wherein inserting an implant into the subject through the bur hole includes inserting a deep brain stimulation probe into a brain of the subject.

Assignees

• Medtronic Ps Medical Inc

Inventors

• Vu Michael
• Stearns Donald E

Classifications

• A61B17/1615 Primary

  Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material · CPC title

• A61B17/1695

  Trepans or craniotomes, i.e. specially adapted for drilling thin bones such as the skull · CPC title

• A61B17/1628

  Motors; Power supplies · CPC title

• A61B17/1657

  Bone breaking devices · CPC title

• A61B17/16 Primary

  Instruments for performing osteoclasis; Drills or chisels for bones; Trepans {(arthroscopic bone cutters A61B17/320016)} · CPC title