Multi-part cervical endoprosthesis with insertion instrument

• US 7,320,689 B2
• Filed: 07/15/2003
• Issued: 01/22/2008
• Est. Priority Date: 07/15/2003
• Status: Expired due to Term

• Current Assignee: Cervitech, Inc. (Nuvasive Incorporated)
• Original Assignee: Cervitech, Inc. (Nuvasive Incorporated)
• Inventors: Keller, Arnold
• Primary Examiner(s): Ramana; Anuradha
• Application Number:
  US10/619,179
• Publication Number:
  US 20050015094A1
• Time in Patent Office: 1,652 Days
• Field of Search: 606/53, 606/60, 606/61, 606/86, 606/99, 623/11.11, 623/16.11, 623 1711- 1716
• US Class Current: 606/99
• CPC Class Codes: A61F 2/4425 made of articulated components
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• 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 2002/30576 with extending fixation tabs
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30795 Blind bores, e.g. of circular cross-section
• CPC Class Codes: A61F 2002/308 oblong
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/443 having two transversal endplates and at least one intermediate component
• CPC Class Codes: A61F 2002/4622 having the shape of a forceps or a clamp
• 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 2002/4681 by applying mechanical shocks, e.g. by hammering
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit

Abstract

A multi-part intervertebral endoprosthesis includes a top closure plate, a bottom closure plate, a sliding core between the closure plates, each closure plate having a pair of receiving openings or projections, and an insertion instrument which has a handgrip area and a gripping area with retention projections or openings which, in order to hold the intervertebral endoprosthesis on the insertion instrument, can be engaged in the receiving openings or projections. The receiving openings are arranged in lateral side faces of the intervertebral endoprosthesis, and at least the pair of receiving openings on one of the closure plates has an extended shape extending in the direction toward the other closure plate. In this way, without making changes to the insertion instrument, intervertebral endoprostheses with sliding cores of different thicknesses can be held securely and with the guarantee that they are correct positioned within the insertion instrument.

Claims

1. A multi-part intervertebral endoprosthesis system, comprising:

a multi-part intervertebral endoprosthesis, comprising,

a top closure plate,

a bottom closure plate, and

a sliding core between the top and bottom closure plates, each closure plate including a pair of receiving openings, and

an insertion instrument which comprises a handgrip and a gripping portion for engaging the top and bottom closure plates with corresponding retention projections which, in order to hold the intervertebral endoprosthesis on the insertion instrument, are configured to engage with the corresponding receiving openings,

the receiving openings being arranged in lateral side faces relative to an implanted position of the closure plates, and the receiving openings assigned to one of the closure plates each have an elongate shape extending in a direction toward the other closure plate.

2. The multi-part intervertebral endoprosthesis system of claim 1, wherein the receiving openings with an elongate shape are in the form of a slit.

3. The multi-part intervertebral endoprosthesis system of claim 1 or 2, wherein the receiving openings with an elongate shape extend over the entire height of the closure plate.

4. The multi-part intervertebral endoprosthesis system of claim 1 or 2, wherein the receiving openings with an elongate shape extend over part of the height of the sliding core.

5. The multi-part intervertebral endoprosthesis system of claim 1 or 2, wherein the receiving openings with an elongate shape extend over the entire height of the sliding core.

6. The multi-part intervertebral endoprosthesis system of claim 1 or 2, wherein the receiving openings with an elongate shape narrow with increasing depth relative to a height of the multi-part intervertebral endoprosthesis.

7. The multi-part intervertebral endoprosthesis system of claim 1 or 2, wherein receiving openings assigned to the other closure plate have a round shape.

8. The multi-part intervertebral endoprosthesis system of claim 1 or 2, wherein the retention projections are plates or pins.

9. A kit, comprising:

the multi-part intervertebral endoprosthesis system of claim 1 or 2,

and further comprising different sizes of sliding cores of different thicknesses.

10. The multi-part intervertebral endoprosthesis system of claim 1, wherein the gripping portion of the insertion instrument comprises a block with an abutment surface configured for bearing on the at least one of the closure plates, said block being connected to a force-receiving part on the insertion instrument for applying an insertion force to the intervertebral endoprosthesis.

11. The multi-part intervertebral endoprosthesis system of claim 10, wherein the block is arranged rigidly on the gripping portion.

12. The multi-part intervertebral endoprosthesis system of claim 11, wherein the block is secured to the gripping portion with a through-screw.

13. The multi-part intervertebral endoprosthesis system of claim 11, wherein the block is secured to the gripping portion with a clamping screw.

14. The multi-part intervertebral endoprosthesis of claim 11, 12 or 13, wherein the block is arranged on a jaw insert.

15. The multi-part intervertebral endoprosthesis system of claim 10, 11, 12 or 13, further comprising a rod with a handle in the rear area of the handgrip arranged on the block.

16. The multi-part intervertebral endoprosthesis system of claim 15, wherein the handle is designed as a strike head.

17. The multi-part intervertebral endoprosthesis of claim 16, wherein the block is arranged on a jaw insert.