Method and apparatus for implanting a prosthesis

• US 20070219562A1
• Filed: 03/17/2006
• Published: 09/20/2007
• Est. Priority Date: 03/17/2006
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Schmidt, Kurt, Lakin, Ryan, Parcher, Kimberly, Slone, W., Smits, Aaron
• Granted Patent: US 7,727,282 B2
• Time in Patent Office: Days
• US Class Current: 606/99
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/4609 of acetabular cups
• CPC Class Codes: A61F 2/4637 for connecting or disconnecting two parts of a prosthesis
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30405 made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30426 Bayonet coupling
• CPC Class Codes: A61F 2002/30505 spring biased
• CPC Class Codes: A61F 2002/30545 for adjusting a diameter
• CPC Class Codes: A61F 2002/30617 Visible markings for adjusting, locating or measuring
• CPC Class Codes: A61F 2002/30808 parallel
• CPC Class Codes: A61F 2002/30822 Circumferential grooves
• CPC Class Codes: A61F 2002/3403 Polar aperture
• CPC Class Codes: A61F 2002/3417 the outer shell having protrusions on meridian lines, e.g. equidistant fins or wings around the equatorial zone
• CPC Class Codes: A61F 2002/4635 using minimally invasive surgery
• 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 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2250/001 for adjusting a diameter
• CPC Class Codes: A61F 2250/0097 Visible markings, e.g. indicia
• CPC Class Codes: A61F 2310/00011 : Metals or alloys
• 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 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures

Abstract

A method and apparatus for implanting various portions of a prosthesis into an anatomy. The instruments can include portions that allow for positive and rigid engagement with a selected prosthesis member to allow for positioning it relative to the anatomy. Further, various instruments can include portions that allow it to engage or match with marking portions or alignment portions on a first prosthesis member to align a second prosthesis member with the first one. Further, methods of using the various instruments are taught and providing for a less or minimally invasive procedure.

Claims

1. An implantation system for positioning a prosthesis system relative to a selected portion of an anatomy including a boney portion, the implantation system comprising:

a shell operable to be positioned relative to the boney portion;

a shell inserter instrument operable to engage an exterior engagement portion of the shell to hold the shell in a selected orientation;

a liner to engage an interior portion of the shell; and

a liner inserter instrument to hold the liner in a selected orientation and a shell alignment member to align the shell to orient the liner inserter relative to the shell;

wherein the shell and the liner are operable to be positioned relative to the anatomy.

2. The implantation system of claim 1, wherein the shell includes an exterior wall that defines a detent to be engaged by a shell engaging finger extending from the shell inserter instrument.

3. The implantation system of claim 2, wherein the shell engagement finger extends from a cam follower member;

wherein the cam follower member extends into a top plate of the shell inserter instrument;

wherein the top plate defines a cam to allow the cam follower to move by the cam.

4. The implantation system of claim 3, wherein the top plate includes a handle engaging member;

where a handle is operable to engage the top plate to rotate the top plate to move the cam.

5. The implantation system of claim 3, further comprising:

a cam follower engaging member operable to hold the cam follower in a selected position relative to the top plate.

6. The implantation system of claim 1, wherein the shell inserter instrument is operable to be positioned relative to the bony portion through a small incision formed in a portion of the anatomy.

7. The implantation system of claim 1, wherein the liner is both hard and rigid.

8. The implantation system of claim 1, wherein the shell defines a shell axis and the liner defines a liner axis;

wherein the liner is operably fixed in the shell when the liner is inserted in the shell when the liner axis is aligned with the shell axis.

9. The implantation system of claim 8, wherein the shell alignment member is operable to positively engage the shell to orient the liner relative to the shell so that the liner axis is aligned with the shell axis.

10. The implantation system of claim 9, wherein the liner inserter instrument includes a liner holding member moveable between an engaged position and a non-engaged position;

a biasing member operable to bias the liner holding member in the engaged position.

11. The implantation system of claim 10, wherein the liner inserter instrument further includes a liner disengaging member;

wherein the liner disengaging member moves the liner and assists in moving the liner holding member from the engaged position to the unengaged position and to insert the liner into the shell.

12. The implantation system of claim 1, wherein the shell defines a first alignment portion;

wherein the shell alignment member is operable to engage the first alignment portion of the shell to align the liner inserter instrument with the shell.

13. The implantation system of claim 12, wherein when the liner inserter instrument is aligned with the shell, the liner, held by the liner inserter instrument, is aligned with the shell.

14. An implantation system for positioning a shell prosthesis system relative to a selected portion of the anatomy including a boney portion, the implantation system comprising:

a top plate defining a track;

an engagement member including an engagement finger and a cam engaging portion able to be positioned in the track;

a shell contacting portion; and

a handle operable to rotate the top plate to move the engagement member.

15. The implantation system of claim 14, wherein the top plate is rotatable relative to the shell contacting portion.

16. The implantation system of claim 14, wherein the top plate defines a central axis;

wherein the track defines a portion of an arc that extends between a first track end and a second track end;

wherein the first track end is further from the central axis than the second track end.

17. The implantation system of claim 16, wherein when the top plate rotates, the cam engaging portion moves within the track between the first track end and the second track end.

18. The implantation system of claim 14, further comprising:

a cam locking member;

wherein the cam locking member is able to lock the cam engaging portion at a selected position relative to the top plate.

19. The implantation system of claim 14, further comprising:

a shell;

wherein the shell is operable to contact the shell contacting portion so that the handle is operable to rotate the top plate.

20. The implantation system of claim 19, wherein the shell defines an inserter engagement portion;

wherein the engagement finger is operable to engage the inserter engagement portion.

21. The implantation system of claim 14, further comprising:

an alignment plate;

wherein the alignment plate is positioned between the top plate and the shell contacting portion;

wherein the alignment plate is operable to guide the engagement finger in a substantially linear motion on a radius relative to the top plate.

22. An implantation system for positioning a liner prosthesis system relative to a selected portion of the anatomy including a boney portion and a shell prosthesis, the implantation system comprising:

a liner prosthesis holding body;

a liner engaging member including a finger able to contact the liner prosthesis and moveable between a contacting position and a non-contacting position;

a biasing member to bias the finger to the contacting position;

a shell prosthesis alignment member able to align the liner prosthesis holding body relative to the shell prosthesis; and

a disengagement member to assist in moving the finger from the contacting position to the non-contacting position.

23. The implantation system of claim 22, wherein the biasing member includes an arm formed as a single portion with the finger.

24. The implantation system of claim 22, further comprising:

a handle extending from liner prosthesis holding body;

wherein the handle defines a bore therethrough.

25. The implantation system of claim 24, wherein the disengagement member includes a rod extending through the bore;

a disengagement body extending from the rod;

an activation portion extending from the rod;

wherein the activation portion and the disengagement body generally extend from opposite ends of the rod.

26. The implantation system of claim 25, wherein the activation portion is operable to move the rod and the disengagement body to overcome the biasing force of the biasing member to move the finger.

27. The implantation system of claim 22, further comprising:

a shell prosthesis including an alignment portion;

wherein the shell prosthesis alignment member is operable to positively engage the shell alignment portion.

28. The implantation system of claim 27, wherein the shell alignment portion includes only a visual indication of a position of the shell.