Interspinal vertebral implant

• US 5,645,599 A
• Filed: 04/22/1996
• Issued: 07/08/1997
• Est. Priority Date: 07/26/1994
• Status: Expired due to Term

• Current Assignee: Paradigm Spine
• Original Assignee: Fixano SAS (Stryker Corporation)
• Inventors: Samani, Jacques
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): NGUYEN, TRAM A
• Application Number:
  US08/635,735
• Time in Patent Office: 442 Days
• Field of Search: 623/17, 606/60, 606/61, 606/53, 606/72, 606/74
• US Class Current: 623/17.16
• CPC Class Codes: A61B 17/7062 Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs rib fixation devices A61B17/8076; Tools for such devices
• CPC Class Codes: A61F 2002/30131 horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30571 Leaf springs
• CPC Class Codes: A61F 2002/30578 having apertures, e.g. for receiving fixation screws
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/449 comprising multiple spinal implants located in different intervertebral spaces or in different vertebrae
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: Y10S 606/907 Composed of particular material or coated

Abstract

This implant comprises a substantially U-shaped body having an elastic flexibility in the area of its central portion, and two pairs of brackets projecting from the outer face of the two branches of the body, these brackets defining stirrups for receiving the spinous processes of the vertebrae and comprising means permitting them to be fixed to the processes.

Claims

1. An interspinal vertebral implant comprising:

a U-shaped body having a central portion and two branches, wherein at least the central portion is elastically flexible;

two pairs of brackets, wherein each pair of brackets projects from an outer face of one of the two branches, and wherein each pair of brackets comprises a stirrup for receiving a spinous process of a vertebrae; and

means wherein said brackets includes for attaching the brackets to spinous processes of the vertebrae.

2. The implant as claimed in claim 1, further comprising a bearing cushion made of a suitable elastic material, which is either a woven material or a synthetic material, said bearing cushion being located between the branches of the U-shaped body.

3. The implant as claimed in claim 1, wherein the U-shaped body is made of a metal material forged in one piece.

4. The implant as claimed in claim 3, wherein the U-shaped body is made of titanium.

5. The implant as claimed in claim 1, wherein the pairs of brackets are offset in relation to one another along the branches of the body, in such a way that several successive implants can be put into place on several consecutive vertebrae.

6. The implant as claimed in claim 1, wherein the means for attaching the brackets to the spinous processes of the vertebrae comprise a plurality of holes for receiving screws or crimped spikes that engage the processes.

7. The implant as claimed in claim 1, wherein the pair of brackets projecting from an upper branch of the U-shaped body converge toward one another in the direction of their free ends, and wherein the pair of brackets projecting from a lower branch of the U-shaped body converge in an initial phase toward one another and then diverge in the direction of their free ends.