End device for a vertebral implant

• US 7,621,953 B2
• Filed: 05/15/2006
• Issued: 11/24/2009
• Est. Priority Date: 12/01/2005
• Status: Expired due to Fees

• Current Assignee: SDGI Holdings Incorporated (Medtronic Plc), Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Karahalios, Dean G., Braddock, Danny Horton Jr.
• Primary Examiner(s): Barrett; Thomas C
• Assistant Examiner(s): WOODALL, NICHOLAS W
• Application Number:
  US11/434,051
• Publication Number:
  US 20070129805A1
• Time in Patent Office: 1,289 Days
• Field of Search: 623 1711- 1716, 606/61
• US Class Current: 623/17.11
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61F 2/30744 End caps, e.g. for closing an endoprosthetic cavity
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30235 tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/30428 made by inserting a protrusion into a slot
• 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 2002/30481 using a locking clip
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30784 Plurality of holes
• CPC Class Codes: A61F 2002/30841 Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• 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 2002/4622 having the shape of a forceps or a clamp
• CPC Class Codes: A61F 2002/4627 with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4628 : with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• 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 2230/0069 : cylindrical

Abstract

The present application is directed to spacing devices that attach directly or indirectly to vertebral implants. The spacing device may include a first side that faces the implant, and an angled second side that faces towards a vertebral member. The angled second side matches the shape of the vertebral member. The devices may further include apertures that receive spikes that extend outward from the implant. The second side may also include spikes that bite into and maintain the position of the device against the vertebral member. In one method of use, the spacing device may be rotated relative to the implant for the angled second side to match the vertebral member. The apertures are then placed over the spikes that extend outward from the implant to connect the spacing device to the implant.

Claims

1. A device for spacing first and second vertebral members comprising:

an implant including first and second opposing ends with implant spikes that extend outward from at least the first end and an implant aperture in the first end;

a spacer configured to attach to the first end of the implant comprising;

a first surface that faces towards the implant;

a second surface configured to face towards the first vertebral member, the second surface being positioned at an acute angle relative to the first surface;

a plurality of apertures that extend into the first surface and through to the second surface with each of the plurality of apertures sized to receive one of the implant spikes; and

a plurality of spikes that extend outward from the second surface configured to engage the vertebral member; and

an extension extending outward from the first surface and including a flared end sized to fit within the implant aperture in the first end;

the spacer including a thickness measured between the first and second surfaces that is less than a length of at least one of the implant spikes for the implant spike to extend through the spacer and outward beyond the second surface to engage with the vertebral member.

2. The device of claim 1, wherein the first and second surfaces are substantially flat.

3. The device of claim 1, wherein the spacer further comprises a central opening that is surrounded by a sidewall.

4. The device of claim 1, wherein each of the plurality of apertures are evenly spaced around the second surface with a distance between each of the plurality of apertures being substantially the same.

5. The device of claim 1, further comprising an attachment member that extends outward from the first surface to attach with the implant.

6. A device for spacing first and second vertebral members comprising:

an implant including first and second opposing ends, the first end including a receiving aperture;

a spacer configured to attach to the first end of the implant comprising;

an annular member including a first surface that faces towards the implant and a second surface configured to face towards the vertebral member, the second surface being positioned at an acute angle relative to the first surface;

a plurality of apertures that extend into the first surface to receive implant spikes that extend outward from the implant, the plurality of apertures being evenly spaced around the first surface;

a deformable finger that extends outward at a non-perpendicular angle from the first surface and is sized to fit within the receiving aperture in the first end of the implant;

a plurality of spikes that extend outward from the second surface configured to engage the vertebral member; and

an attachment member extending outward from the first surface, the attachment member including a flared end sized to fit within a second aperture in the first end of the implant to attach the annular member to the implant.

7. The device of claim 6, further comprising an attachment member extending outward from the first surface, the attachment member including a biasing member to attach the annular member to the implant.

8. The device of claim 6, wherein the first and second surfaces are substantially flat.

9. The device of claim 6, wherein the plurality of apertures extend through to the second surface.

10. The device of claim 9, wherein each of the plurality of apertures are evenly spaced around the second surface with a distance between each of the plurality of apertures being substantially the same.

11. A device for spacing first and second vertebral members comprising:

an implant including first and second opposing ends and an implant spike that extends outward from the first end;

a spacer configured to attach to the first end of the implant comprising;

a first surface that faces towards the implant;

a second surface configured to face towards the vertebral member, the second surface being positioned at an acute angle relative to the first surface;

a plurality of apertures that extend through the spacer from the first and second surfaces;

an attachment member that extends outward from the first surface to attach the spacer to the implant; and

a plurality of spikes that extend outward from the second surface configured to engage the vertebral member;

the spacer including a first side with a first thickness measured between the first and second surfaces and a second side with a greater second thickness;

the implant spike including a length that is greater than the first thickness and less than the second thickness, an end of the implant spike extending outward beyond the second surface when mounted in one of the plurality of apertures adjacent to the first side and the implant spike positioned within an interior of the spacer between the first and second surfaces when mounted in one of the plurality of apertures at the second side.

12. The device of claim 11, wherein the attachment member includes a flared end.

13. The device of claim 11, further comprising a second attachment member extending outward from the first surface to attach the spacer to the implant.

14. The device of claim 11, wherein the plurality of apertures extend through to the second surface.

15. The device of claim 14, wherein each of the plurality of apertures are evenly spaced around the second surface with a distance between each of the plurality of apertures being substantially the same.