Interspinous bone implant device

• US 8,771,368 B2
• Filed: 04/24/2012
• Issued: 07/08/2014
• Est. Priority Date: 04/24/2012
• Status: Active Grant

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: McKay, William F.
• Primary Examiner(s): Sweet, Thomas J
• Assistant Examiner(s): Prone, Christopher D
• Application Number:
  US13/454,571
• Publication Number:
  US 20130282138A1
• Time in Patent Office: 805 Days
• Field of Search: 623/11.11, 623/16.11, 623/17.11, 623/17.12, 623/23.51, 623/23.6, 623/23.61, 623/23.63, 606/248, 606/249
• US Class Current: 623/23.51
• 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

Abstract

A bone implant system is provided including a bone graft body having at least a demineralized surface for implantation at a bone site, the bone graft body including at least one attachment member. At least one bone delivery carrier including a covering is provided, the carrier configured to be attachable to the bone graft body and including at least one compartment. An affixing member may be provided for attaching the at least one bone delivery carrier to the at least one attachment member of the bone graft body. A demineralized bone matrix material is disposed within the at least one compartment, wherein the covering retains the demineralized bone matrix material for placement at the bone site and facilitates transfer of cells into and out of the covering.

Claims

1. A bone implant system comprising:

a bone graft body for implantation at a bone site comprising at least one attachment member;

at least one bone delivery carrier including a polymer covering, the at least one bone delivery carrier is configured to be attachable to the bone graft body and comprising at least one compartment;

a demineralized bone matrix material disposed within the at least one compartment, wherein the polymer covering retains the demineralized bone matrix material for placement at the bone site and facilitates transfer of cells into and out of the polymer covering, and the demineralized bone matrix material comprises fully demineralized bone fibers and surface demineralized bone chips in a ratio of 25;

75 to about 75;

25 fibers to chips.

2. A bone implant system of claim 1, wherein the bone graft body comprises a cortical allograft block.

3. A bone implant system of claim 2, wherein the allograft block includes a demineralized surface and/or grooves to reduce motion of the allograft block.

4. A bone implant system of claim 3, wherein the allograft block is shaped to fit between two adjacent spinous processes.

5. A bone implant system of claim 1, wherein the at least one attachment member comprises at least one hole formed in the bone graft body and is configured to receive one or more sutures.

6. A bone implant system of claim 1, wherein the demineralized bone matrix material further comprises surface demineralized bone particles.

7. A bone implant system of claim 1, wherein the covering comprises a flexible mesh material and the bone graft is configured in a butterfly shape and comprises at least one hole configured to receive a suture.

8. A bone implant system of claim 1, wherein the covering comprises human skin, collagen, human hair, polyethylene glycol, chitosan, alginate, cellulose, hyaluronic acid, keratin, a biodegradable polymer, poly(lactide-co-glycolide), fat, bone, or a combination thereof.

9. A bone implant system of claim 1, further comprising an affixing member for attaching the at least one bone delivery carrier to the bone graft body.

10. A bone implant system comprising:

a bone graft body having at least a demineralized surface for implantation at a bone site, the bone graft body comprising at least one attachment member;

at least one bone delivery carrier including a polymer covering, said carrier configured to be attachable to the bone graft body and comprising at least one compartment;

an affixing member for attaching the at least one bone delivery carrier to the at least one attachment member of the bone graft body;

a demineralized bone matrix material disposed within the at least one compartment, wherein the polymer covering retains the demineralized bone matrix material for placement at the bone site and facilitates transfer of cells into and out of the polymer covering, the demineralized bone matrix material comprises fully demineralized bone fibers and surface demineralized bone chips in a ratio of 25;

75 to about 75;

25 fibers to chips.

11. A bone implant system of claim 10, wherein the bone graft body comprises a cortical allograft block.

12. A bone implant system of claim 11, wherein the allograft block is shaped to fit between two adjacent spinous processes and/or the allograft block comprises a wedge.

13. A bone implant system of claim 10, wherein the at least one attachment member comprises at least one through hole formed in the bone graft body and is configured to receive one or more sutures.

14. A bone implant system of claim 10, wherein the demineralized bone matrix material further comprises surface demineralized bone particles.

15. A bone implant system of claim 10, wherein the covering comprises a flexible mesh material comprising human skin, collagen, human hair, polyethylene glycol, chitosan, alginate, cellulose, hyaluronic acid, keratin, a biodegradable polymer, poly(lactide-co-glycolide), fat, bone, or a combination thereof.