Tamp with horizontal steps used for impaction bone grafting in revision femur

• US 6,013,080 A
• Filed: 10/30/1997
• Issued: 01/11/2000
• Est. Priority Date: 10/30/1997
• Status: Expired due to Term

• Current Assignee: DePuy Orthopaedics Incorporated (Johnson & Johnson)
• Original Assignee: Johnson & Johnson Professional Company Incorporated (Johnson & Johnson)
• Inventors: Khalili, Farid Bruce
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Woo, Julian W.
• Application Number:
  US08/961,044
• Time in Patent Office: 803 Days
• Field of Search: 606/85, 606/84, 606/81, 606/79, 606/86, 606/94, 606/93, 606/92, 623/23
• US Class Current: 606/86.00R
• CPC Class Codes: A61F 2/367 Proximal or metaphyseal parts of shafts trochanteric devices connected to said proximal parts A61F2/30739
• CPC Class Codes: A61F 2/4601 for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
• 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 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/369 Stepped shaft, i.e. having discrete diameter changes
• CPC Class Codes: A61F 2002/3694 with longitudinal bores
• CPC Class Codes: A61F 2002/4631 the prosthesis being specially adapted for being cemented
• CPC Class Codes: A61F 2250/0064 Sets comprising a plurality of prosthetic parts of different sizes
• CPC Class Codes: A61F 2310/00017 Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00179 Ceramics or ceramic-like structures

Abstract

A tamp system includes a plurality of tamps, each of which includes an elongated body having a stepped outer surface. The body has a diameter and a longitudinal axis, wherein the diameter decreases from a proximal end to a distal end thereof. The stepped outer surface includes a plurality of steps each having a distal-facing surface and a side-facing surface. Each tamp is adapted for compacting morsellized bone matter in a canal in a bone. The compacted bone matter can be used to resize the canal for a new prosthesis in a prosthesis revision surgery.

Claims

1. A tamp device for compacting a material in a cavity, comprising:

an elongate body having proximal and distal ends, an outer surface and a longitudinal axis, the outer surface having a cross-section that decreases from the proximal end to the distal end thereof; and

a plurality of steps formed in the outer surface wherein each of the steps has a distal-facing surface and a side-facing surface, and each side-facing surface has a length that extends from a proximal end of the side-facing surface to a distal end of the side-facing surface, wherein adjacent distal-facing surfaces and side-facing surfaces intersect to form respective compacting crests, and the distal-facing surfaces of the steps are proximally canted to form an angle of less than about twenty degrees with a normal to the longitudinal axis of the body;

wherein each of the distal-facing surfaces of the plurality of steps extends further from the longitudinal axis than an adjacent, distally located distal-facing surface, such that each distal-facing surface is effective to longitudinally compact the material as the tamp is inserted into the cavity.

2. The device according to claim 1 wherein the side-facing surface is parallel to the longitudinal axis.

3. The device according to claim 1 wherein the side-facing surface is tapered from the proximal end of the side-facing surface to the distal end of the side-facing surface.

4. The device according to claim 1, wherein the material includes morsellized bone.

5. The device according to claim 1, wherein the cavity is in a bone and is adapted to receive a prosthetic component.

6. The device according to claim 1, wherein the elongate body has approximately three to six steps formed therein.

7. The device according to claim 6, wherein the length of each step, extending from proximal end to the distal end thereof, is in the range of about two to about ten millimeters.

8. The device according to claim 1, wherein each step extends about a circumference of the elongate body.

9. The device according to claim 1, wherein the elongate body is cannulated along the longitudinal axis.

10. A system for compacting a morsellized bone material in a bone cavity, comprising:

a plurality of tamps of differing sizes, each of the plurality of tamps including an elongate body with a proximal end and a distal end, the elongate body having an outer surface, and a longitudinal axis; and

a plurality of compacting steps formed in the outer surface wherein each of the steps extends about the outer surface of the elongate body and has a distal-facing surface and a side-facing surface,

each side-facing surface having a length that extends from a proximal end of the side-facing surface to a distal end of the side-facing surface, the distal-facing surfaces of the steps being proximally canted and forming an angle of less than about twenty degrees with a normal to the longitudinal axis of the body,

wherein each of the distal-facing surfaces of the plurality of steps extends further from the longitudinal axis than an adjacent, distally located distal-facing surface, such that each distal-facing surface longitudinally compacts the material as the tamp is inserted into the cavity.

11. The system according to claim 10, wherein the outer surface of each tamp has a cross-sectional area that decreases from the proximal end to the distal end thereof.

12. The system according to claim 10, wherein the side-facing surface of each step of one of the tamps is substantially parallel to the longitudinal axis of the tamp.

13. The system according to claim 10, wherein the side-facing surface of each step of one of the tamps is tapered from a proximal end of the side-facing surface to a distal end of the side-facing surface.

14. The system according to claim 10, wherein each tamp has approximately two to about ten steps formed therein.

15. The system according to claim 14, wherein the length of each step, extending from the proximal end of the side-facing surface to the distal end of the side-facing surface, is in the range of about two to about ten millimeters.