SPACE HOLDER, IN PARTICULAR FOR A VERTEBRA OR AN INTERVERTEBRAL DISK

• US 20010014826A1
• Filed: 08/31/1999
• Published: 08/16/2001
• Est. Priority Date: 02/14/1995
• Status: Abandoned Application

• Current Assignee: Jurgen Harms, Lutz Biedermann
• Original Assignee: Jurgen Harms, Lutz Biedermann
• Inventors: HARMS, JURGEN, BIEDERMANN, LUTZ
• Application Number:
  US09/386,885
• Publication Number:
  US 20010014826A1
• Time in Patent Office: Days
• US Class Current: 623/17.11
• CPC Class Codes: A61F 2/30744 End caps, e.g. for closing an endoprosthetic cavity
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• 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 2002/30115 circular-O-shaped
• CPC Class Codes: A61F 2002/30125 elliptical or oval
• CPC Class Codes: A61F 2002/30126 oval-O-shaped
• CPC Class Codes: A61F 2002/30148 lozenge- or diamond-shaped
• CPC Class Codes: A61F 2002/30158 trapezoidal
• CPC Class Codes: A61F 2002/302 toroidal, e.g. rings
• CPC Class Codes: A61F 2002/30228 Cylinders of elliptical or oval basis
• CPC Class Codes: A61F 2002/3023 wedge-shaped cylinders
• CPC Class Codes: A61F 2002/30235 tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/30355 Cylinder of elliptical or oval basis
• CPC Class Codes: A61F 2002/30403 Longitudinally-oriented cooperating ribs and grooves on mating lateral surfaces of a mainly longitudinal connection
• CPC Class Codes: A61F 2002/3055 for adjusting length
• CPC Class Codes: A61F 2002/30574 with an integral complete or partial collar or flange
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30772 Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30912 : made of expanded metal, e.g. diamond mesh or metal nets having lozenge-shaped apertures
• 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 2230/0006 : circular
• CPC Class Codes: A61F 2230/0008 : elliptical or oval
• CPC Class Codes: A61F 2230/0017 : Angular shapes
• CPC Class Codes: A61F 2230/0026 : trapezoidal
• CPC Class Codes: A61F 2230/0065 : toroidal, e.g. ring-shaped, doughnut-shaped
• CPC Class Codes: A61F 2230/0069 : cylindrical

Abstract

A space holder in particular for a vertebra or an intervertebral disk is provided. The space holder comprises a jacket (1) having apertures (9, 10) and a first and second edge (7, 8). The edge has circumferentially adjacent recesses (9, 10; 9′, 10′) each extending in direction towards the other edge and a stop provided at at least one of the edges spaced from the outer edge. In order to provide for an easy manufacture and operation of the space holder the stop is formed by a member (11, 13, 16, 22) having an outer contour corresponding to the inner contour of the jacket (1) and nose-like projections (15) for engaging the recesses (9, 10) are provided at those locations of the periphery of the stop which correspond to the recesses (9, 10; 9′, 10′).

Claims

1. Space holder, in particular for a vertebra or an intervertebral disk, comprising a jacket (1) having apertures and a first and second edge (7, 8) as well as adjacent recesses (9, 10;

9′

, 10′

) arranged in peripheral direction and each extending in direction towards the other edge and a stop provided at at least one of the ends at a distance from the outer edge,

characterized in that the stop is formed by a member (11, 13, 16, 19, 22) having an outer contour corresponding to the inner contour of the jacket (1) and comprising nose-shaped projections (15) at locations of its periphery corresponding to the recesses (9, 10;

9′

, 10′

) for engaging the recesses.

2. Space holder according to

claim 1

, characterized in that the recesses are each formed as V-shaped recesses (9, 10;

9′

, 10′

) having equal distances from each other.

3. Space holder according to

claim 1

or

2

, characterized in that the outer periphery is dimensioned so that the member (11, 13, 16, 19, 22) is held by friction fit in the jacket (1).

4. Space holder according to any of the

claims 1

to

3

, characterized in that the jacket (1) is made as a grid having diamond-shaped apertures (3, 4).

5. Space holder according to

claim 4

, characterized in that one diagonal of each diamond (3, 4) extends parallel to the longitudinal axis (2) of the space holder.

6. Space holder according to any of the

claims 1

to

5

, characterized in that the member (11, 13, 16) is formed as a plate.

7. Space holder according to

claim 6

, characterized in that the plate (12) is ring-shaped.

8. Space holder according to

claim 6

, characterized in that the plate (13) comprises a plurality of adjacent holes (14).

9. Space holder according to any of the

claims 6

to

8

, characterized in that the length of the noses (15) is at least equal to the wall thickness of the jacket (1).

10. Space holder according to

claim 9

, characterized in that an outer ring (17) extending around the member (13) and having a contour corresponding to the outer contour of the jacket (1) is provided at the outer edges of the noses (15).

11. Space holder according to

claim 10

, characterized in that the outer ring (17) is connected with the noses (15) along its center line.

12. Space holder according to any of the

claims 1

to

11

, characterized in that a serrated edge (21, 21′

) projecting beyond the free end of the jacket (1) is provided at the side of the member facing the adjacent end.

13. Space holder according to

claim 12

, characterized in that the serrated edge extends parallel to the plate (12).

14. Space holder according to

claim 12

, characterized in that the serrated edge extends obliquely to the plate (12).

15. Space holder according to any of the

claims 1

to

14

, characterized in that the edge comprises an even number of equidistant recesses.