Spacer molds with releasable securement

• US 10,471,638 B2
• Filed: 10/30/2014
• Issued: 11/12/2019
• Est. Priority Date: 10/29/2008
• Status: Active Grant

• Current Assignee: Zimmer Orthopaedic Surgical Products (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Zimmer Orthopaedic Surgical Products (Zimmer Biomet Holdings, Inc.)
• Inventors: Haney, Sean, Sporer, Scott
• Primary Examiner(s): Hauth, Galen H
• Application Number:
  US14/527,994
• Publication Number:
  US 20150061181A1
• Time in Patent Office: 1,839 Days
• CPC Class Codes: A61F 2/30942 for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30329 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30672 temporary
• CPC Class Codes: A61F 2002/30677 Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2002/30957 using a positive or a negative model, e.g. moulds
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2310/00353 Bone cement, e.g. polymethylmethacrylate or PMMA
• CPC Class Codes: B29C 45/66 mechanical

Abstract

A mold for forming a temporary prosthesis has at least two mold members at least partially separable from each other. The at least two mold members cooperatively define a generally enclosed interior cavity for forming the temporary prosthesis. The mold has a securement structure mounted on the at least two mold members for securing the at least two mold members to each other during the forming of the temporary prosthesis. The securement structure is removable from the at least two mold members by hand and without the use of a tool.

Claims

1. A mold for forming a tibial knee prosthesis, comprising:

a tub-shaped first mold member defining an open cavity;

a tub-shaped second mold member configured to be at least partially received within the cavity of the first mold member to form a tub-shaped mold defining a mold cavity between the first and second mold members, wherein the second mold member is movable within the cavity of the first mold member to any one of a plurality of predetermined positions to vary a dimension of the tibial knee prosthesis, the second mold member having a non-threaded securement portion configured to permit concurrent selection of one of the plurality of predetermined positions and noon-threaded securement of the second mold member to the first mold member; and

numerical indicia of predetermined dimensions of the prosthesis on an exterior portion of the first mold member or the second mold member.

2. The mold of claim 1, wherein one of the first mold member and the second mold member comprises an extension and the other one of the first mold member and the second mold member defines a slot, the extension receivable within the slot to selectively position the second mold member within the first mold member.

3. The mold of claim 1, wherein the second mold member defines a plurality of predetermined apertures, each one of the plurality of predetermined apertures providing a different dimension of the tibial knee prosthesis.

4. The mold of claim 1, wherein the dimension is a superior-inferior thickness of the tibial knee prosthesis.

5. The mold of claim 1, the mold further comprising a plurality of indicia corresponding to a plurality of predetermined dimensions of the tibial knee prosthesis.

6. The mold of claim 1, wherein the mold is configured to form the tibial knee prosthesis with a stem.

7. The mold of claim 1, wherein the mold is configured to receive a pressurized, curable material for forming the tibial knee prosthesis.

8. A mold for forming a prosthesis, comprising:

a first mold member having a peripheral shape of a tibial knee prosthesis;

a second mold member configured to be at least partially received within the first mold member, the second mold member having a surface configured to form an articulating surface of the tibial knee prosthesis;

a non-threaded securement structure configured to provide non-threaded securement of the first mold member and the second mold member to one another; and

numerical indicia of predetermined dimensions of the prosthesis on an exterior portion of the first mold member or the second mold member.

9. The mold of claim 8, wherein a superior-inferior thickness of the prosthesis can be varied by selective placement of the second mold member.

10. The mold of claim 8, the mold further comprising indicia corresponding to a plurality of predetermined dimensions of the prosthesis.

11. The mold of claim 8, wherein the mold is configured to optionally form the prosthesis with a stem.

12. The mold of claim 8, further comprising a stem portion defining a stem cavity.

13. The mold of claim 8, wherein the second mold member is configured to be removably received within the first mold member.

14. The mold of claim 8, wherein the second mold member is configured to be selectively positioned relative to the first mold member to vary a dimension of the mold cavity.

15. The mold of claim 8, wherein the mold is configured with a port to receive a pressurized, curable material for forming the prosthesis.

16. A system for molding a prosthesis, comprising:

a first mold member having a peripheral shape of a tibial knee prosthesis;

a second mold member having a peripheral shape of a tibial knee prosthesis, one of the first mold member and the second mold member configured to be received within the other one of the first mold member and the second mold member, the first and second mold members secured to one another using a non-threaded securement structure and cooperating to define an enclosed mold cavity for forming a tibial knee prosthesis; and

numerical indicia of predetermined dimensions of the prosthesis on an exterior portion of the first mold member or the second mold member.

17. The system of claim 16, wherein one of the first mold member and the second mold member defining a plurality of slots, each one of the plurality of slots defining a different predetermined dimension of the prosthesis, the other one of the first mold member and the second mold member comprising at least one extension configured to be received within any of the plurality of slots to provide a different dimension of the prosthesis.

18. The system of claim 16, wherein the mold includes at least five numerical indicia corresponding to at least five predetermined dimensions of the prosthesis.

19. The system of claim 16, further comprising a stem portion defining a stem cavity.

20. The system of claim 16, wherein one of the first mold member and the second mold member comprises a port configured for receiving a molding material.