Graft constraint device

• US 6,113,603 A
• Filed: 04/26/1999
• Issued: 09/05/2000
• Est. Priority Date: 05/10/1996
• Status: Expired due to Term

• Current Assignee: David Medoff, Lars G. Tellman, Robert J. Medoff
• Original Assignee: Robert J. Medoff
• Inventors: Medoff, Robert J.
• Primary Examiner(s): Hirsch, Paul J.
• Application Number:
  US09/180,161
• Time in Patent Office: 498 Days
• Field of Search: 606/69, 606/70, 623/16
• US Class Current: 623/16.11
• CPC Class Codes: A61B 17/68 Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin bone staples A61B17/0642
• CPC Class Codes: A61B 17/8085 with pliable or malleable elements or having a mesh-like structure, e.g. small strips A61B17/8071, A61B17/8076 take precedence
• CPC Class Codes: A61B 17/809 with bone-penetrating elements, e.g. blades or prongs bone staples A61B17/0642; intramedullary nails with a plate at an end A61B17/7233
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61B 17/8695 Washers surrounding screw head in plate hole A61B17/8047, between bone plate and bone A61B17/8028
• CPC Class Codes: A61F 2/2846 Support means for bone substitute or for bone graft implants, e.g. membranes or plates for covering bone defects nets or sleeves applied to surface of endoprostheses A61F2/30907; bone plates A61B17/80; bone regeneration in dental surgery A61C8/0006
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30131 horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30189 E-shaped or epsilon-shaped
• CPC Class Codes: A61F 2002/30578 having apertures, e.g. for receiving fixation screws
• CPC Class Codes: A61F 2002/30594 slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• CPC Class Codes: A61F 2013/00357 implanted wound fillings or covers membranes for covering bone defects A61F2/2846
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0036 E-shaped, e.g. epsilon-shaped

Abstract

The present invention relates to a graft constraint device (10), having the main object of constraining graft material (1) packed into a bone defect or a space for buttressing an adjacent bone fragment, the graft material being autologous bone, allograft bone, xenograft, organic or inorganic material, "bone paste" or other similar materials. The graft constraint device (10) has a constraint end (12) and a fastening end (13), at which the device (10) is applied to a stable bone cortex with suitable fasteners (11).

Claims

1. A device for constraining graft material packed into a bone defect or a space for buttressing an adjacent bone fragment, said device comprising a graft restraining member having one end with means for constraining the graft material and an opposite end for receiving fastening means for securing the graft restraining member to a stable bone cortex, said graft material comprising a hardenable synthetic material, said means for constraining the graft material being applied as a buttress for containing the synthetic graft material after said synthetic graft material hardens, said means for constraining said synthetic graft material including projecting members inserted into said synthetic graft material before said synthetic graft material hardens so that after said synthetic graft material hardens, said projecting members become integral with said synthetic graft material to hold the hardened graft material in position and prevent translation movement thereof.

2. The device of claim 1, wherein said one end of said graft restraining member for constraining the graft is malleable ti allow contouring of said projecting members to be adapted to its site of application.

3. The device of claim 1, wherein said one end of said graft restraining member has at least one opening to allow ingrowth of blood vessels.

4. The device of claim 1, wherein said means at said one end of the graft restraining member further comprises a buttressing plate covering at least a part of the graft material.

5. The device of claim 1, wherein said means at said one end of the graft restraining member further comprises a mesh.

6. The device of claim 1, wherein said projecting members comprises a plurality of malleable fingers.

7. The device of claim 1, wherein said graft restraining member comprises a wire bent into U-shape.

8. The device of claim 1, further comprising a plate for placement between the graft restraining member and underlying bone at said one end of the graft restraining member.

9. The device of claim 8, wherein said plate includes seats for receiving said graft restraining member.

10. The device of claim 9, wherein said plate includes a raised portion forming said seats.

11. The device of claim 1, wherein said graft restraining member at said one end includes a portion for covering the graft material and from which said projecting members extend into the graft material.

12. The device of claim 1, wherein said fastening means comprises a screw.

13. The device of claim 6, wherein said synthetic graft material is packed into the bone defect or space to a determined depth and said fingers project into said synthetic graft material over a substantial portion of the depth of said graft material.

14. The combination of said device and said synthetic graft material as claimed in claim 1.