Modular femoral provisional

Patent metadata

Field	Value
Publication number	US-10076418-B2
Application number	US-201514880573-A
Country	US
Kind code	B2
Filing date	Oct 12, 2015
Priority date	Mar 1, 2007
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A provisional prosthetic system that replicates the characteristics of a corresponding, nonprovisional femoral prosthesis. The provisional prosthetic system may include a frame component and a shell component. The frame component of the provisional prosthetic system may be configured to be attached directly to a resected femur. In one exemplary embodiment, the frame component is impacted onto the resected femur to firmly seat therewith. Once the frame component is secured to the resected femur, a shell component of the provisional prosthetic system may be positioned on and secured to the frame component. In one exemplary embodiment, the frame component is made from a metallic material. This allows for the frame component to maintain the rigidity necessary to facilitate proper trialing. In another exemplary embodiment, the shell component is a plastic.

First claim

What is claimed is:

1. A modular provisional system comprising:
a frame component including:
a first condylar base forming a first portion of a shell contacting surface;
a second condylar base forming a second portion of the shell contacting surface, the second condylar base separated from the first condylar base by a central gap;
an anterior bridge forming a third portion of the shell contacting surface and connected on a lateral side to a first end of the first condylar base and on a medial side to a first end of the second condylar base;
a posterior bridge forming a fourth portion of the shell contacting surface and connected on a lateral side to a second end of the first condylar base and on a medial side to a second end of the second condylar base;
a plurality of shell components, each of said plurality of shell components configured to be releaseably secured to the shell contacting surface of the frame component by a plurality of engagement structures, the frame component and each of said plurality of shell components cooperable to form different provisional implants each of which replicate the characteristics of at least one nonprovisional component of a prosthesis system, wherein the plurality of engagement structures include a plurality of projections from a frame contacting surface of the plurality of shell components.

2. The modular provisional system of claim 1 , wherein the posterior bridge replicates the cam of a posterior stabilized implant.

3. The modular provisional system of claim 1 , wherein the shell contacting surface includes a plurality of openings corresponding to the plurality of projections.

4. The modular provisional system of claim 3 , wherein the anterior bridge includes a first opening of the plurality of openings, the first condylar base includes a second opening of the plurality of openings, and the second condylar base includes a third opening of the plurality of openings.

5. The modular provisional system of claim 1 , wherein the first condylar base includes a first post projecting from a first bone contacting surface, and the second condylar base includes a second post projecting from a second bone contacting surface.

6. The modular provisional system of claim 1 , wherein the frame component includes bone contacting surfaces configured to contact the distal end of a resected femur on three separate planes formed by resected surfaces including a distal resection, an anterior resection and posterior resection.

7. The modular provisional system of claim 1 , further comprising a plurality of frame components; each of said plurality of frame components configured to be secured to a distal end of a resected femur.

8. A modular provisional system comprising:
a frame component including a bone contacting surface and a shell contacting surface, the frame component comprising:
a first condylar base forming a first portion of the shell contacting surface;
a second condylar base forming a second portion of the shell contacting surface, the second condylar base separated from the first condylar base by a central gap;
an anterior bridge connected on a lateral side to a first end of the first condylar base and on a medial side to a first end of the second condylar base;
a posterior bridge, opposite the anterior bridge, connecting a second end of the first condylar base to a second end of the second condylar base;
wherein the first condylar base, the second condylar base, the anterior bridge, and the posterior bridge form a portion of the shell contacting surface;
a plurality of shell components, each of said plurality of shell components configured to be releaseably secured to the support surface of the frame component by a plurality of engagement structures, the frame component and each of said plurality of shell components cooperable to form different provisional implants each of which replicate the characteristics of at least one nonprovisional component of a prosthesis system, wherein the plurality of engagement structures include a plurality of projections from a frame contacting surface of the plurality of shell components.

9. The modular provisional system of claim 8 , wherein the posterior bridge replicates the cam of a posterior stabilized implant.

10. The modular provisional system of claim 8 , wherein the shell contacting surface includes a plurality of openings corresponding to the plurality of projections.

11. The modular provisional system of claim 10 , wherein the anterior bridge includes a first opening of the plurality of openings, the first condylar base includes a second opening of the plurality of openings, and the second condylar base includes a third opening of the plurality of openings.

12. The modular provisional system of claim 8 , wherein the first condylar base includes a first post projecting from a first bone contacting surface, and the second condylar base includes a second post projecting from a second bone contacting surface.

13. The modular provisional system of claim 8 , wherein the bone contacting surface of the frame component is configured to contact the distal end of a resected femur on three separate planes formed by resected surfaces including a distal resection, an anterior resection and posterior resection.

14. A modular provisional system comprising:
a plurality of frame components, each of the plurality of frame components configured to be secured to a distal end of a resected femur and including a bone contacting surface and a shell contacting surface, each frame component comprising:
a first condylar base forming a first portion of the shell contacting surface;
a second condylar base forming a second portion of the shell contacting surface, the second condylar base separated from the first condylar base by a central gap;
an anterior bridge connected on a lateral side to a first end of the first condylar base and on a medial side to a first end of the second condylar base;
a posterior bridge, opposite the anterior bridge, connecting a second end of the first condylar base to a second end of the second condylar base;
wherein the first condylar base, the second condylar base, the anterior bridge; and the posterior bridge form a portion of the shell contacting surface;
a plurality of shell components, each of said plurality of shell components configured to be releaseably secured to the support surface of the frame component by a plurality of engagement structures, the frame component and each of said plurality of shell components cooperable to form different provisional implants each of which replicate the characteristics of at least one nonprovisional component of a prosthesis system.

Assignees

• Zimmer Inc

Inventors

• Earl Brian D
• Figueroa Marvin
• Campbell Travis H

Classifications

• A61F2/4684

  Trial or dummy prostheses · CPC title

• A61F2002/2825

  Femur · CPC title

• A61F2002/30878

  with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts · CPC title

• A61F2220/0025

  Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements · CPC title

• A61F2002/30004

  the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis · CPC title