Modular articulating cement spacer mold

• US 7,637,729 B2
• Filed: 12/13/2007
• Issued: 12/29/2009
• Est. Priority Date: 12/13/2007
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Hawkins, H. Gene, Martin, Kristen, Hartman, William, Wilson, Jacob
• Primary Examiner(s): Davis; Robert B
• Application Number:
  US11/955,601
• Publication Number:
  US 20090157189A1
• Time in Patent Office: 747 Days
• Field of Search: 249/55, 249/61, 249/95, 249/97, 249/102, 425/2, 425/116, 623/901
• US Class Current: 425/116
• CPC Class Codes: A61F 2/30 Joints
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2002/30672 temporary
• CPC Class Codes: A61F 2002/30957 using a positive or a negative model, e.g. moulds
• CPC Class Codes: A61F 2250/0059 temporary
• CPC Class Codes: A61F 2310/00353 Bone cement, e.g. polymethylmethacrylate or PMMA
• CPC Class Codes: B28B 1/24 by injection moulding injection moulding of ceramic slips B28B1/265; of tubular articles B28B21/38
• CPC Class Codes: B28B 7/0029 Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts

Abstract

The present teachings provide a modular articulating cement spacer mold for forming a temporary implant. The modular spacer mold includes a head component mold defining a first opening, a head connector positioned within the first opening of the head component mold, a stem component mold defining a second opening, and a stem connector to fit within the second opening of the stem component mold to mateably engage the head connector. Related kits and methods of forming a temporary implant are provided.

Claims

1. A modular articulating cement spacer mold for forming a temporary implant comprising:

a head component mold defining a first opening therein;

a head connector positioned within the first opening of the head component mold;

a stem component mold defining a second opening therein; and

a stem connector to fit within the second opening of the stem component mold and mateably engage the head connector.

2. The modular articulating cement spacer mold according to claim 1, wherein at least one of the head component mold and the stem component mold includes at least one surface area increasing feature thereon.

3. The modular articulating cement spacer mold according to claim 1, wherein at least one of the head component mold and the stem component mold include a plurality of surface area increasing features thereon.

4. The modular articulating cement spacer mold according to claim 2, wherein the surface area increasing feature is selected from the group consisting of grooves, notches, dimples, stars, hemispheres, cones, ridges, and combinations thereof.

5. The modular articulating cement spacer mold according to claim 1, wherein at least one of the head component mold and the stem component mold further defines an input port being operably sealable to receive a delivery nozzle.

6. The modular articulating cement spacer mold according to claim 1, wherein the head component mold and the stem component mold are made of a silicone polymer.

7. The modular articulating cement spacer mold according to claim 1, wherein at least one of the head component mold and the stem component mold include a removal mechanism operable to assist in removal of the mold from a cement.

8. The modular articulating cement spacer mold according to claim 7, wherein the removal mechanism is selected from the group consisting of a tongue and groove connection, a pull string, a pull tab, and combinations thereof.

9. The modular articulating cement spacer mold according to claim 1, wherein the head connector and the stem connector are made of a biocompatible metal and mateably fit together with a taper fit.

10. The modular articulating cement spacer mold according to claim 1, wherein the stem connector is moveable with respect to the stem component mold.

11. The modular articulating cement spacer mold according to claim 10, wherein movement of the stem component mold upon filling the stem component mold with a filling material maintains the sealed integrity of the stem component mold.

12. The modular articulating cement spacer mold according to claim 1:

wherein the head component mold and the stem component mold include a plurality of surface area increasing features thereon, wherein the surface area increasing features are independently selected from the group consisting of grooves, notches, dimples, stars, hemispheres, cones, ridges, and combinations thereof;

wherein the head component mold and the stem component mold each define an input port being operably sealed to receive a delivery nozzle; and

wherein the head component mold and the stem component mold include a removal mechanism selected from the group consisting of a tongue and groove connection, a pull string, a pull tab, and combinations thereof operable to assist in the removal of the mold from a cement.

13. A kit for forming modular articulating cement spacer mold for forming temporary implants comprising:

at least one head component mold defining a first opening therein;

at least one head connector positioned within the first opening of the head component mold

at least one stem component mold defining a second opening therein; and

at least one stem connector to fit within the second opening of the stem component mold and mateably engage the head connector.

14. The kit according to claim 13 further comprising a plurality of head component molds of different sizes.

15. The kit according to claim 13 further comprising a plurality of stem component molds of different sizes.

16. The kit according to claim 13 further comprising a plurality of bridge adapters of different sizes.

17. The kit according to claim 13, wherein at least one of the head component mold and the stem component mold have surface features thereon to provide an imprint on the temporary implant.

18. The kit according to claim 17, wherein the surface area increasing features are selected from the group consisting of grooves, notches, dimples, stars, hemispheres, cones, ridges, and combinations thereof.

19. The kit according to claim 13 further comprising a dispensing device.

20. The kit according to claim 13 further comprising at least one of a bone cement or an antibiotic.

21. The kit according to claim 13 comprising:

a plurality of head component molds of different sizes wherein at least one head component mold has at least one surface area increasing feature thereon;

a plurality of stem component molds of different sizes wherein at least one stem component mold has at least one surface area increasing feature thereon;

a plurality of bridge adapters of different sizes;

a cement;

an antibiotic; and

a dispensing device.

22. A modular articulating cement spacer mold for forming a temporary implant comprising:

a head component mold defining a first opening therein;

a head connector positioned within the first opening of the head component mold, wherein the head connector is movable with respect to the head connector mold;

a stem component mold defining a second opening therein; and

a stem connector configured to fit within the second opening of the stem component mold and to link with the head connector, wherein the stem connector is movable with respect to the stem component mold;

wherein the head component mold and the stem component mold include a plurality of surface area increasing features thereon, wherein the surface area increasing features are independently selected from the group consisting of grooves, notches, dimples, stars, hemispheres, cones, ridges, and combinations thereof;

wherein the head component mold and the stem component mold each define an input port being operably sealed to receive a delivery nozzle; and

wherein the head component mold and the stem component mold include a removal mechanism selected from the group consisting of a tongue and groove connection, a pull string, a pull tab, and combinations thereof.

23. The modular articulating cement spacer mold according to claim 22, wherein movement of the stem component mold upon filling the stem component mold with a filling material maintains sealed integrity of the stem component mold.

24. The modular articulating cement spacer mold according to claim 22, wherein the head component mold and the stem component mold are made of a silicone polymer.

25. The modular articulating cement spacer mold according to claim 22, wherein the removal mechanism is operable to assist in the removal of the mold from a cement.