Surface replacement extractor device and associated method

• US 20050209597A1
• Filed: 03/05/2004
• Published: 09/22/2005
• Est. Priority Date: 03/05/2004
• Status: Active Grant

• Current Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Inventors: VonZabern, Robert, Long, Jack F.
• Granted Patent: US 7,879,042 B2
• Time in Patent Office: Days
• US Class Current: 606/86.R
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/3603 implanted without ablation of the whole natural femoral head endoprosthetic cartilage A61F2/30756
• CPC Class Codes: A61F 2/4607 of hip femoral endoprostheses
• CPC Class Codes: A61F 2/4609 of acetabular cups
• CPC Class Codes: A61F 2002/30411 having two threaded end parts connected by a threaded central part with opposite threads at its opposite ends, i.e. for adjusting the distance between both end parts by rotating the central part
• CPC Class Codes: A61F 2002/30428 made by inserting a protrusion into a slot
• CPC Class Codes: A61F 2002/30471 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/4619 for extraction
• CPC Class Codes: A61F 2002/4622 having the shape of a forceps or a clamp
• CPC Class Codes: A61F 2002/4627 with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4628 with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping
• CPC Class Codes: A61F 2002/4681 by applying mechanical shocks, e.g. by hammering
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0091 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type

Abstract

An instrument for use in removal of a prosthetic implant for use performing arthroplasty is provided. The instrument includes a body and a first member. The first member is operably associated with the body. The first member has a contact portion for engagement with the implant at a first position. The instrument also includes a second member operably associated with the body. The second member is moveable with respect to the first member and the second member has a contact portion for engagement with the implant at a second position, spaced from the first position.

Claims

1. An instrument for use in removal of a prosthetic implant for use performing arthroplasty, comprising:

a body;

a first member operably associated with said body, said first member including a contact portion for engagement with the implant at a first position; and

a second member operably associated with said body, said second member being moveable with respect to said first member, said second member including a contact portion for engagement with the implant at a second position, spaced from the first position.

2. The instrument of claim 1, wherein said first member is moveable with respect to said body and said second member.

3. The instrument of claim 1, wherein at least one of said first member and said second member is pivotably attached to said body.

4. The instrument of claim 1, wherein at least one of the contact portion of said first member and contact portion of said second member is generally wedge shaped.

5. The instrument of claim 1, wherein at least one of the contact portion of said first member and contact portion of said second member is generally fork shaped having two spaced apart contact areas.

6. The instrument of claim 1, wherein at least one of said first member and said second member includes a second contact portion spaced from the first mentioned contact portion.

7. The instrument of claim 1, wherein at least one of said first member and said second member cooperates to fixedly secure the implant there-between.

8. The instrument of claim 1, further comprising a hammer operably associated with said body for urging said body in a first direction.

9. An instrument for use in removal of a prosthetic implant having a hollow generally hemispherical portion having a peripheral rim, the implant for use performing arthroplasty, the instrument comprising:

a body;

a first member operably associated with said body, said first member including a contact portion for engagement with the rim of the implant at a first position; and

a second member operably associated with said body, said second member being moveable with respect to said first member, said second member including a contact portion for engagement with the implant at a second position, spaced from the first position.

10. The instrument of claim 9, wherein said first member is moveable with respect to said body and said second member.

11. The instrument of claim 9, wherein at least one of said first member and said second member is pivotably attached to said body.

12. The instrument of claim 9, wherein at least one of the contact portion of said first member and contact portion of said second member is generally wedge shaped.

13. The instrument of claim 9, wherein at least one of the contact portion of said first member and contact portion of said second member is generally fork shaped having two spaced apart contact area.

14. The instrument of claim 9, wherein at least one of said first member and said second member includes a second contact portion spaced from the first mentioned contact portion.

15. The instrument of claim 9, wherein at least one of said first member and said second member cooperates to fixedly secure the implant there-between.

16. The instrument of claim 9, further comprising a hammer operably associated with said body for urging said body in a first direction.

17. The instrument of claim 9, further comprising a shaft connected to said body and threadably connected to at least one of said first member and said second member for moving at least one said first member and said second member with respect to said body.

18. The instrument of claim 9, further comprising a linking member positioned between the body and one of the first member and the second member.

19. The instrument of claim 9, further comprising:

a first linking member pivotably connected to said body and said first member;

a second linking member pivotably connected to said body and said second member; and

a third linking member pivotably connected to said first member and said second member.

20. The instrument of claim 9, further comprising a hammer slidably fitted over at least a portion of said body for use in urging said instrument and the implant in a first direction.

20-1. A kit for use in performing arthroplasty, said kit comprising:

an implant; and

an instrument for use in removal of a prosthetic implant for use performing arthroplasty, the instrument including a body, a first member operably associated with said body, said first member including a contact portion for engagement with said implant at a first position, and a second member operably associated with said body, said second member being moveable with respect to said first member, said second member including a contact portion for engagement with said implant at a second position, spaced from the first position.

22. The kit of claim 21, further comprising a trial.

23. The kit of claim 21, further comprising a cutter for preparing a long bone for receiving said implant.

24. A method for removing a surface replacement implant from a long bone, the method comprising the steps of:

Providing an instrument having a body, a first member and a second member, the first member being operably associated with the body and including a contact portion for engagement with the implant at a first position, the second member being operably associated with the body and being moveable with respect to the first member, the second member including a contact portion for engagement with the implant at a second position, spaced from the first position;

separating the first contact portion from the second contact portion;

placing the instrument into alignment with the implant;

advancing the first contact portion toward the second contact portion; and

retracting the instrument and implant from the long bone.