Method and apparatus for implanting an acetabular cup

• US 6,264,698 B1
• Filed: 03/01/1999
• Issued: 07/24/2001
• Est. Priority Date: 10/29/1993
• Status: Expired due to Term

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Howmedica International S. De R.L. (Stryker Corporation)
• Inventors: Lawes, Peter, Ling, Robin S. M.
• Primary Examiner(s): Willse, David H.
• Assistant Examiner(s): Stewart, Alvin
• Application Number:
  US09/259,792
• Time in Patent Office: 876 Days
• Field of Search: 623/22.12, 623/22.11, 623/22.39, 623/23.19, 623/23.2, 623/23.48, 606/92, 606/93, 606/94, 606/95
• US Class Current: 623/22.12
• CPC Class Codes: A61B 17/7098 wherein the implant is permeable or has openings, e.g. fenestrated screw hollow surgical screws A61B17/864
• CPC Class Codes: A61B 17/8802 Equipment for handling bone cement or other fluid fillers
• CPC Class Codes: A61B 17/8808 with sealing collar for bone cavity
• CPC Class Codes: A61B 17/8816 characterised by the conduit, e.g. tube, along which fluid flows into the body or by conduit connections
• CPC Class Codes: A61F 2/4609 of acetabular cups
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/3429 with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
• CPC Class Codes: A61F 2002/4631 the prosthesis being specially adapted for being cemented
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: Y10S 623/908 Bone

Abstract

A method of implanting an acetabular cup which includes the step of preparing an acetabular socket to receive a cup, placing cement in the acetabular socket before or after locating a tube in line with the acetabular socket and inserting the acetabular cup through the tube and into the socket.

Claims

1. An apparatus for implanting a prosthesis in an acetabular socket comprising:

an acetabular cup,

a tube aligned with the acetabular socket having an inner bore with a cross-section sized to receive a flange on a trailing end of the acetabular cup as it is inserted within the bore towards the acetabular socket, an end of the bore adjacent the acetabular socket having an inwardly projecting abutment, the flange on the cup having a gap formed thereon which is dimensioned to allow the abutment to pass therethrough.

2. The apparatus as claimed in claim 1 including a flexible skirt secured to said loading tube.

3. The apparatus as claimed in claim 2 in which the bore of said tube is provided with a projecting collar dimensioned to engage the cup with which it is to be used.

4. The apparatus as claimed in claim 3 in which said skirt is corrugated.

5. The apparatus as claimed in claim 2 in which a flow control orifice is provided in the skirt.

6. The apparatus as claimed in claim 2 in which said tube is removable from the skirt.

7. The apparatus as claimed in claim 1 in which an inserter piston is provided in the tube.

8. The apparatus as claimed in claim 1 wherein said tube has an adjustable diameter.

9. The apparatus as claimed in claim 1 in which a first end of said tube has a wedge or sloped orientation.

10. The apparatus as claimed in claim 1 in which a first end of said tube is deformable.

11. The apparatus as claimed in claim 1 in which the loading tube may be oriented on the bone into which the cup is to be inserted.

12. The apparatus as claimed in claim 1 in which said loading tube is made from a synthetic plastics material.

13. An apparatus for implanting a prosthesis in an acetabular socket comprising:

an acetabular cup,

a loading tube sized to receive said cup, adapted for alignment with the acetabular socket, said tube having openings at both ends, said openings sized to allow passage of said cup therethrough during implantation; and

a cup inserter adapted to fit into said tube and drive said cup therethrough, the inner bore of said tube formed with an inwardly projecting abutment and said acetabular cup having a flange with a gap dimensioned to allow the abutment to pass therethrough, said inserter sized to contact said abutment to prevent the inserter from passing beyond the abutment.

14. The apparatus for implanting an acetabular cup as set forth in claim 13 further including a flexible skirt assembly around the rim of the socket with said tube extending from said flexible skirt.

15. The apparatus for implanting an acetabular cup as set forth in claim 14 wherein the flexible skirt is integrally attached to an outer diameter of the tube.

16. The apparatus for implanting an acetabular cup as set forth in claim 15 wherein the flexible skirt is made from a synthetic plastic material.

17. The apparatus for implanting an acetabular cup as set forth in claim 16 wherein the flexible skirt is made from polyethylene, polypropylene or polyurethane.

18. The apparatus for implanting an acetabular cup as set forth in claim 13 wherein the tube has a collar extending around an inner circumference thereof at the end adjacent the acetabular socket with said gap being formed in said collar.

19. The apparatus for implanting an acetabular cup as set forth in claim 15 wherein said flexible skirt is made from a resorbable material.

20. The apparatus for implanting an acetabular cup as set forth in claim 19 wherein the flexible skirt is made from a member selected from a group of polyglycolic acid, polylactic acid and a combination thereof.