Vertebral enplate decorticator and osteophyte resector

• US 6,030,401 A
• Filed: 10/07/1998
• Issued: 02/29/2000
• Est. Priority Date: 10/07/1998
• Status: Expired due to Term

• Current Assignee: Nubasive, Inc., Nuvasive Incorporated
• Original Assignee: Nuvasive Incorporated
• Inventors: Marino, James F.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Woo, Julian W.
• Application Number:
  US09/168,306
• Time in Patent Office: 510 Days
• Field of Search: 606/170, 606/180, 606/83, D08/62, D08/90
• US Class Current: 606/180
• CPC Class Codes: A61B 17/144 with cutting edges at the side of the saw blades
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 2017/00261 Discectomy

Abstract

A device for removing cortical tissue from a vertebral endplate, comprising: an elongated handle; a rotatably-mounted driving rod received in said handle; a dumbbell-shaped burr connected to said driving rod; and an eccentric support having first and second opposite ends, said first end being connected to said handle and said second forming a collar around said dumbbell-shaped burr.

Claims

1. An device for bone decortication and osteophyte resection, comprising:

an elongated handle;

a rotatably-mounted driving rod received in said handle;

a burr axially connected to said driving rod; and

an eccentric support connected to said burr and projecting outwardly from said elongated handle to a distance greater than a radius of the burr.

2. The device for bone decortication and osteophyte resection as set forth in claim 1, wherein,

said burr is dumbbell-shaped,

said eccentric support terminates in a collar which is disposed around a narrow portion of said dumbbell-shaped burr.

3. The device for bone decortication and osteophyte resection as set forth in claim 1, further comprising,

at least one gripping structure projecting outwardly from the eccentric support.

4. A method of removing bony tissue from a vertebral endplate, comprising,

inserting an instrument having a rotatable burr mounted to an elongated handle and an eccentric support projecting outwardly from said elongated handle to a distance greater than a radius of the burr into a patient'"'"'s intervertebral space;

rotating the instrument to position the eccentric support against a first vertebral surface;

pivoting the instrument about a contact point between the eccentric support and the first vertebral surface such that the rotatable burr is held firmly against a second vertebral surface opposite the first vertebral surface; and

rotating the rotatable burr.

5. The method of removing bony tissue from a vertebral endplate as set forth in claim 4, wherein,

the instrument is inserted into the patient'"'"'s intervertebral space through a percutaneously inserted cannula.

6. An improved surgical tool having a handle and a work element which rotates about an axis defined by the handle, wherein the handle provides a support surface for the work element and defines a work region on the work element for engagement against a body surface, wherein the improvement comprises a fulcrum attached to the handle and defining a pivot point disposed on a side of the work element away from the work region.

7. An improved surgical tool as in claim 6, wherein the fulcrum is disposed on a side of the work element opposite to that of the work region.

8. An improved surgical tool as in claim 6, wherein the tool is selected from the group consisting of an osteophyte resector and a vertebral endplate decorticator.

9. An improved surgical tool as in claim 6, wherein the work element rotates about a fixed axis relative to the handle.

10. An improved surgical tool as in claim 6, wherein the handle comprises a straight shaft having an axis which is aligned with the rotational axis of the work element.