Flexible space holder

• US 8,771,357 B2
• Filed: 05/04/2005
• Issued: 07/08/2014
• Est. Priority Date: 05/04/2004
• Status: Active Grant

• Current Assignee: Biedermann Technologies GmbH & Co. KG
• Original Assignee: Biedermann Technologies GmbH & Co. KG
• Inventors: Biedermann, Lutz, Harms, Jrgen, Matthis, Wilfried
• Primary Examiner(s): Robert, Eduardo C
• Assistant Examiner(s): HARVEY, JULIANNA NANCY
• Application Number:
  US11/121,888
• Publication Number:
  US 20050267471A1
• Time in Patent Office: 3,352 Days
• Field of Search: 623 1713- 1716, 403/229
• US Class Current: 623/17.16
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• 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 2/4465 having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
• CPC Class Codes: A61F 2002/30148 lozenge- or diamond-shaped
• 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 2002/30566 Helical springs
• CPC Class Codes: A61F 2002/30818 castellated or crenellated
• CPC Class Codes: A61F 2002/30841 Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2230/0017 Angular shapes
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys

Abstract

The present invention refers to a flexible space holder for temporary or permanent introdution into a human or animal body of at least one biocompatible, rigid material having a tube-like body (1), with one or more flexible areas being formed by material recesses mare provided for.

Claims

1. A space holder for vertebrae and for intervertebral discs of at least one biocompatible material, the space holder comprising:

a tube-like body having a longitudinal axis, the tube-like body comprising at least one rigid section having a tubular wall with a plurality of holes through the wall, and a flexible section adjacent to the rigid section, the flexible section having a helical recess separate from the plurality of holes;

wherein the rigid section of the tube-like body further comprises an end portion configured to engage a body part, wherein the rigid and flexible sections are a continuous one-piece element;

wherein the tubular wall of the rigid section defines an interior cavity radially inward from tubular wall, and each of the plurality of holes extending radially through the tubular wall to the interior cavity.

2. The space holder according to claim 1, wherein the biocompatible material is selected from the group comprising titanium, titanium alloys and plastics.

3. The space holder according to claim 1, wherein the recess is a groove-like recess formed in the wall of said tube-like body.

4. The space holder according to claim 3, wherein the recess is an open aperture in the wall of said tube-like body.

5. The space holder according to claim 1, wherein two recesses are formed in the tube-like body of said space holder.

6. The space holder according to claim 5, wherein said two recesses are groove-like recesses.

7. The space holder according to claim 5, wherein said two recesses are intertwined.

8. The space holder according to claim 1, wherein said space holder is compressible and extendable along a longitudinal axis of the tube-like body, bendable relative to the longitudinal axis, and torsionable about the longitudinal axis.

9. The space holder according to claim 1, wherein the end portion comprises projections.

10. The space holder according to claim 9, wherein said projections comprise serrations for engagement with adjacent body parts.

11. The space holder according to claim 10, wherein said projections are triangular.

12. The space holder according to claim 10, wherein said projections are trapezoidal.

13. The space holder according to claim 1, wherein the tube-like body is elastically extendable or compressible by about 0.5 to about 20% in the longitudinal direction.

14. The space holder according to claim 13, wherein the tube-like body is elastically extendable or compressible by about 1 to about 15% in the longitudinal direction.

15. The space holder according to claim 1, wherein the tube-like body is elastically bendable about a radial axis.

16. The space holder according to claim 15, wherein the end portion can pivot by about 0.5 to about 10°

from a longitudinal axis of the tube-like body.

17. The space holder according to claim 16, wherein the end portion can pivot about 1 to about 6°

from the longitudinal axis of the tube-like body.

18. The space holder according to claim 1, wherein said tube-like body is torsionable about a longitudinal axis, wherein the end portion is torsionable by about 0.5 to about 2.5°

.

19. The space holder of claim 1, wherein the end portion has serrations around a circumference of the tubular wall, the serrations being configured to engage the body part.

20. The space holder of claim 1, wherein the plurality of holes are formed by intersecting bars of the rigid section around a circumference of the tubular wall.

21. The space holder of claim 20, wherein the intersecting bars form serrations to engage the body part.

22. The space holder of claim 21, wherein the serrations have a trapezoidal shape and are separated by triangular recesses around the circumference of the tubular wall.

23. The space holder of claim 1, wherein the plurality of holes comprises a row of diamond-shaped openings extending continuously around the circumference of the tubular wall.

24. A space holder for vertebrae and for intervertebral discs of at least one biocompatible material, the space holder comprising:

a tube-like body comprising at least one rigid section having a tubular wall with a plurality of holes through the wall configured for growth of tissue, and a flexible section adjacent to the rigid section, the flexible section having at least one recess having a different shape than the plurality of holes and being separate from the plurality of holes;

wherein the rigid section of the tube-like body further comprises an end portion configured to engage a body part;

wherein the end portion has serrations around a circumference of the tubular wall for engagement with the body part;

wherein the entire space holder is a monolithic body.

25. The space holder according to claim 24, wherein the at least one recess is a helical recess.

26. A space holder for vertebrae and for intervertebral discs of at least one biocompatible material, the space holder comprising:

a tube-like body having a longitudinal axis, the tube-like body comprising at least one rigid section having a tubular wall with a plurality of holes through the wall, and a flexible section adjacent to the rigid section, the flexible section having a helical recess separate from the plurality of holes;

wherein the rigid section of the tube-like body further comprising an end portion configured to engage a body part;

wherein the tubular wall of the rigid section defines an interior cavity radially inward from the tubular wall, and each of the plurality of holes extending radially through the tubular wall to the interior cavity;

wherein the end portion comprises projections to engage a body part; and

,

wherein the entire tube-like body including the at least one rigid section, the flexible section and the projections is a monolithic body.