Trial neck

Patent metadata

Field	Value
Publication number	US-12226324-B2
Application number	US-202217751940-A
Country	US
Kind code	B2
Filing date	May 24, 2022
Priority date	Aug 22, 2017
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

Kits and methods for use in intraoperative trialling of hip prostheses to determine an appropriate length for the femoral neck component of a prosthetic hip joint, are described. A kit for use in selecting a femoral neck component of an orthopaedic joint prosthesis kit comprises a first and a second broach. Each of the first and second broaches has a neck connection element comprising a projection extending from a proximal surface of the broach, each projection having a length. The projection on the first broach has a different length than the projection on the second broach. The kit also includes a trial femoral neck component having a neck connection element in the form of a recess in a distal surface. The recess is configured to mate with the projection on each of the first or second broaches such that mating of the trial femoral neck component with the first broach provides an assembly with a first neck length, and the mating of the trial femoral neck component with the second broach provides an assembly with a second neck length.

First claim

The invention claimed is:

1. A kit for use in selecting a femoral neck component of an orthopaedic joint prosthesis, the kit comprising:
a first and a second broach, each of the first and second broaches having a neck connection element comprising a projection extending from a proximal surface of the broach, each projection having a length, the projection on the first broach having a different length than the projection on the second broach, and
a trial femoral neck component having a neck connection element in the form of a recess in a distal surface, the recess being configured to mate with the projection on each of the first or second broaches such that mating of the trial femoral neck component with the first broach provides an assembly with a first neck length, and in which the mating of the trial femoral neck component with the second broach provides an assembly with a second neck length.

2. The kit according to claim 1 , in which the trial femoral neck component includes a shaft having a longitudinal axis and a flared shoulder component, the flared shoulder component having a first end and a second end, said second end being wider than said first end and being oriented on the shaft such that the second end is distally located, and in which at least a portion of the shoulder component is moveable along the longitudinal axis of the shaft such that the second end is positionable adjacent to the proximal surface of the broach.

3. The kit according to claim 1 , in which the kit includes two said trial femoral neck components, including a standard offset femoral neck trial component and a high offset femoral neck trial component.

4. The kit according to claim 1 , in which the second broach is larger than the first broach, the projection on the second broach being longer than the projection on the first broach, such that a distal surface of the trial femoral neck component is spaced apart from the proximal surface of the first broach a first distance when the projection on the first broach is received within the recess of the trial femoral neck component, and the distal surface of the trial femoral neck component is spaced apart from the proximal surface of the second broach a second distance when the projection on the second broach is received within the recess of the trial femoral neck component, the second distance being greater than the first distance, the second broach thereby providing an assembly with a longer neck length.

5. The kit according to claim 4 , in which the projection extending from the proximal surface of each of the first and second broaches includes a post configured to mate with the recess on the trial femoral neck component.

6. The kit according to claim 1 , in which the second broach is larger than the first broach, the projection on each broach having a portion configured to be received with the recess in the trial femoral neck component, and in which the projection on at least one of the first and second broaches further comprises a platform provided adjacent to the proximal surface of the broach such that a distal surface of the trial femoral neck component is spaced apart from the proximal surface of the broach by the platform, thereby providing an assembly with a longer neck length.

7. The kit according to claim 6 , in which the projection on each of the first and second broaches comprises a platform, the platform on the second broach having a greater length than the platform on the first broach.

8. The kit according to claim 1 , in which the projection is configured for connection with a broach handle.

9. The kit according to claim 1 , in which the kit consists of a single trial femoral neck component that includes a first recess and second recess each being configured for mating with the projection on the first or second broach, in which mating of the projection in the first recess creates an assembly with a femoral neck component having a first horizontal offset, and mating of the projection in the second recess creates an assembly with a femoral neck component having a second first horizontal offset.

10. The kit according to claim 9 , in which the first horizontal offset is a standard offset and the second horizontal offset is a high offset.

11. A method of selecting a femoral neck component for use in an orthopaedic joint prosthesis, the method comprising the step of:
(i) using a kit comprising a first and a second broach, each of the first and second broaches having a neck connection element comprising a projection extending from a proximal surface of the broach, each projection having a length, the projection on the first broach having a different length than the projection on the second broach, and

a trial femoral neck component having a neck connection element in the form of a recess configured to mate with the projection on each of the first or second broaches such that mating of the trial femoral neck component with the first broach provides an assembly with a first neck length, and in which the mating of the trial femoral neck component with the second broach provides an assembly with a second neck length;
(ii) broaching a patient's femur using at least one of the first or second broaches;
(iii) retaining the broach within the patient's femur;
(iv) connecting the trial femoral neck component to the first broach or to the second broach;
(v) connecting a trial femoral head component to the trial femoral neck component; and
(vi) performing a trial reduction.

12. The method according to claim 11 , in which the trial femoral neck component connected to the first or second broach is a standard offset femoral neck trial component or a high offset femoral neck trial component.

13. A method of selecting a femoral neck component for use in an orthopaedic joint prosthesis, the method comprising the step of:
(i) using a kit comprising:

a broach having a neck connection element comprising a projection extending from a proximal surface of the broach, and
a trial femoral neck component having a neck connection element in the form of a first recess and a second recess in a distal surface of the neck component, the first and second recesses being laterally spaced apart on the distal surface, each recess being configured to mate with the projection on the broach, such that mating of the projection on the broach with the first recess on the trial femoral neck component provides an assembly with a first horizontal offset, and in which the mating of the projection on the broach with the second recess on the trial femoral neck component provides an assembly with a second horizontal offset;
(ii) broaching a patient's femur using the broach;
(iii) retaining the broach within the patient's femur;
(iv) connecting the trial femoral neck component to the broach by mating the projection on the broach with one of the first recess or the second recess on the trial femoral neck component to provide a trial femoral neck component with a first horizontal offset;
(v) connecting a trial femoral head component to the trial femoral neck component; and
(vi) performing a trial reduction.

14. The method of claim 13 , further comprising the steps of:
(vii) disconnecting the trial femoral neck component from the broach;
(viii) reconnecting the trial femoral neck component with the broach by mating the projection on the broach with the other one of the first or second recesses on the trial femoral neck component to form a trial femoral neck component with a second horizontal offset;
(ix) connecting a trial femoral head component to the trial femoral neck component; and
(x) performing a trial reduction.

Assignees

• Depuy Ireland Ultd Co
• Depuy Ireland Unlimited Company Loughbeg Ind Estate

Inventors

• Horne David
• Maack Thomas
• Mcanelly Jeffrey
• Prince Stephanie
• Reed James Aaron
• Young Duncan

Classifications

• A61F2002/3654

  Connections of heads directly to shafts · CPC title

• A61F2002/365

  Connections of heads to necks · CPC title

• A61F2002/3625

  Necks · CPC title

• A61F2002/30892

  parallel · CPC title

• A61F2002/30616

  Sets comprising a plurality of prosthetic parts of different sizes or orientations · CPC title