Posterior prosthetic spinal disc replacement and methods thereof

• US 7,892,262 B2
• Filed: 03/01/2006
• Issued: 02/22/2011
• Est. Priority Date: 07/31/2003
• Status: Active Grant

• Current Assignee: Globus Medical, Inc.
• Original Assignee: Globus Medical, Inc.
• Inventors: Angelucci, Christopher, Boyer, Michael L. II, Rhoda, William S., Paul, David C., Duffield, William E.
• Primary Examiner(s): Barrett; Thomas C
• Assistant Examiner(s): WOODALL, NICHOLAS W
• Application Number:
  US11/364,160
• Publication Number:
  US 20070010826A1
• Time in Patent Office: 1,819 Days
• Field of Search: 623/17.11, 623 1714- 1716, 606/86.R, 606/86.A, 606/279
• US Class Current: 606/279
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/1735 for rasps or chisels
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61F 2/442 Intervertebral or spinal discs, e.g. resilient non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455
• CPC Class Codes: A61F 2/4425 made of articulated components
• CPC Class Codes: A61F 2002/30014 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2002/30113 circular
• CPC Class Codes: A61F 2002/30125 elliptical or oval
• CPC Class Codes: A61F 2002/30166 H-shaped or I-shaped
• CPC Class Codes: A61F 2002/302 toroidal, e.g. rings
• CPC Class Codes: A61F 2002/30224 cylindrical
• CPC Class Codes: A61F 2002/30365 with additional means for limiting said rotation
• CPC Class Codes: A61F 2002/30471 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2002/30545 for adjusting a diameter
• CPC Class Codes: A61F 2002/30563 having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
• CPC Class Codes: A61F 2002/30568 Multiple spring systems including two or more helical springs
• CPC Class Codes: A61F 2002/30571 Leaf springs
• CPC Class Codes: A61F 2002/30579 : with mechanically expandable devices, e.g. fixation devices
• CPC Class Codes: A61F 2002/30594 : slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30649 : Ball-and-socket joints
• CPC Class Codes: A61F 2002/30662 : with rotation-limiting means
• CPC Class Codes: A61F 2002/30769 : madreporic
• CPC Class Codes: A61F 2002/30772 : Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30878 : with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/30884 : Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• CPC Class Codes: A61F 2002/443 : having two transversal endplates and at least one intermediate component
• CPC Class Codes: A61F 2002/448 : comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2220/0091 : connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2230/0006 : circular
• CPC Class Codes: A61F 2230/0008 : elliptical or oval
• CPC Class Codes: A61F 2230/0028 : Shapes in the form of latin or greek characters
• CPC Class Codes: A61F 2230/0065 : toroidal, e.g. ring-shaped, doughnut-shaped
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2230/0071 : spherical
• CPC Class Codes: A61F 2250/001 : for adjusting a diameter
• CPC Class Codes: A61F 2250/0018 : differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2310/00407 : Coating made of titanium or of Ti-based alloys
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Abstract

The present invention relates generally to a prosthetic spinal disc for replacing a damaged disc between two vertebrae of a spine. The present invention also relates to a method for implanting a prosthetic spinal disc via posterior or posterior lateral implantation. Other surgical approaches for implanting the prosthetic disc may also be used. The present invention also involves a method for implanting the prosthetic spinal disc while either avoiding or minimizing contact with the spinal cord and nerve rootlets, or reducing the time and extent that they need to be repositioned during implantation.

Claims

1. A method of inserting intervertebral prosthetic disc assemblies from a posterior approach comprising;

inserting a trial into an intervertebral space;

creating at least one first pathway in at least one vertebral body with a chisel, wherein the location of said pathway is determined by the position of the trial, wherein the trial comprises a keyed recess and a rod receptacle, and the keyed recess is capable of receiving an angled guide;

creating at least one second pathway in said vertebral body with a chisel, the chisel configured to be received by the angled guide and the angled guide being selectively engageable with the keyed recess such that a portion of the angled guide is spaced substantially parallel to and at a predetermined distance from, a central axis of the trial, and wherein the location of said second pathway is determined by the position of the trial;

inserting a first assembly of a prosthetic disc into an intervertebral space using one of said first or second pathways, wherein said first or second pathway determines the position of the first assembly; and

inserting a second assembly of a prosthetic disc into the intervertebral space using the other of said first or second pathways, wherein the other of said first or second pathway determines the position of the second assembly

wherein the keyed recess is capable of receiving the guide at a predetermined angle, and the keyed recess is positioned so that it faces a contra-lateral side of a treated area, and the guide is then inserted into the treated area on the contra-lateral side of the area from the trial and chisel and wherein the angled guide attaches to the keyed recess to spaced apart and position a second intervertebral disc.

2. The method of claim 1, wherein each intervertebral prosthetic disc assembly comprises at least one keel.

3. The method of claim 2, wherein a pathway is created for each keel on the intervertebral prosthetic disc assembly.

4. The method of claim 1, wherein each intervertebral prosthetic disc assembly comprises more than one keel.

5. The method of claim 1, wherein the trial further comprises at least one keyed recess.

6. The method of claim 5, wherein the trial further comprises more than one keyed recess.

7. The method of claim 6, wherein the creation of a pathway is accomplished using a chisel, the chisel further comprising at least one blade portion.

8. The method of claim 7, wherein the number of blade portions equals the number of keyed recesses on the trial.

9. The method of claim 8, wherein one or more blade portions of the chisel engage the one or more keyed recess of the trial.

10. The method of claim 5, wherein the number of keyed recesses equals the number of keels on an intervertebral prosthetic disc assembly.

11. The method of claim 1, wherein said second pathway is spaced apart from said first pathway by a predetermined distance.

12. The method of claim 11, wherein said predetermined distance is determined by the position of the trial.