Bone grafting units

• US 4,950,296 A
• Filed: 06/13/1989
• Issued: 08/21/1990
• Est. Priority Date: 04/07/1988
• Status: Expired due to Term

• Current Assignee: RTI Biologics, Inc. (Surgalign Holdings, Inc.)
• Original Assignee: Jonathan L. Mcintyre
• Inventors: McIntyre, Jonathan L.
• Primary Examiner(s): Cannon, Alan
• Application Number:
  US07/365,766
• Time in Patent Office: 434 Days
• Field of Search: 623/16, 623/66, 623/17, 128/92 R, 128/924 R, 128/924 G, 128/924 R, 128/924 S, 606/69, 606/70, 606/76, 606/86
• US Class Current: 623/23.63
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• 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 2/446 having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
• CPC Class Codes: A61F 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2002/2825 Femur
• 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 2002/2839 Bone plugs or bone graft dowels
• CPC Class Codes: A61F 2002/30057 made from both cortical and cancellous adjacent parts
• CPC Class Codes: A61F 2002/30113 circular
• CPC Class Codes: A61F 2002/30153 rectangular
• CPC Class Codes: A61F 2002/30154 square
• CPC Class Codes: A61F 2002/30224 cylindrical
• CPC Class Codes: A61F 2002/30261 parallelepipedal
• CPC Class Codes: A61F 2002/30263 cubical
• CPC Class Codes: A61F 2002/30354 Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
• CPC Class Codes: A61F 2002/30367 with additional means for preventing said rotation
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30733 Inserts placed into an endoprosthetic cavity, e.g. for modifying a material property
• CPC Class Codes: A61F 2002/30772 Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30795 Blind bores, e.g. of circular cross-section
• CPC Class Codes: A61F 2002/4649 : Bone graft or bone dowel harvest sites
• 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 2230/0019 : rectangular
• CPC Class Codes: A61F 2230/0021 : square
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2230/0082 : parallelepipedal
• CPC Class Codes: A61F 2230/0084 : cubical

Abstract

A bone grafting unit comprises a cortical shell having a selected outer shape and size for transplanting and a cavity formed therein for receiving a cancellous plug, and a cancellous plug fitted into said cavity in a manner to expose at least two surfaces thereof to the exterior of said shell.

Claims

1. A bone grafting unit comprising in combination:

a shell formed of cortical bone having cavity and an outer shape and size for transplanting into a position between opposed faces of a bone structure with said cavity open to one of said faces; and

a plug formed of cancellous bone fitted into said cavity.

2. A bone grafting unit according to claim 1 wherein:

said shell has a cylindrical configuration; and

said cavity is transverse to the axis thereof.

3. A bone grafting unit according to claim 1 wherein:

said cortical bone forming said shell is taken from the shaft of a femur.

4. A bone grafting unit according to claim 1 wherein:

said cancellous bone forming said plug is taken from a knee.

5. A bone grafting unit according to claim 1 wherein:

said cancellous plug is taken from the ilium of a subject.

6. A bone grafting unit according to claim 1 wherein:

said shell is a section of a fermoral shaft.

7. A bone grafting unit according to claim 6 wherein:

said cortical shell has an outer wall thickness of at least two mm.

8. A bone grafting unit according to claim 7 wherein:

said cancellous plug is taken from a knee.

9. A bone grafting unit comprising in combination:

a shell formed of a cortical bone having a selected outer shape and size for transplanting to a selected skeletal cite between opposed faces of a skeletal bone and a cavity formed therein for receiving a cancellous plug; and

a cancellous plug formed of a cancellous bone fitted into said cavity in a manner to expose at least one surface thereof to the exterior of said shell.

10. A bone grafting unit according to claim 9 wherein:

said shell has a cylindrical configuration; and

said cavity is a cylindrical bore transverse to the axis thereof.

11. A bone grafting unit according to claim 10 wherein:

said shell formed of a cortical bone is taken from the shaft of a femur.

12. A bone grafting unit according to claim 11 wherein:

said cancellous bone forming said plug is taken from a knee.

13. A bone grafting unit according to claim 12 wherein:

said cancellous bone forming said plug is taken from the ilium of a subject.

14. A bone grafting unit according to claim 10 wherein:

said shell is a section of a fermoral shaft.

15. A bone grafting unit according to claim 14 wherein:

said shell has an outer wall thickness of at least two mm.