Method for femoral prosthesis with insertion/extraction feature

Patent metadata

Field	Value
Publication number	US-10022244-B2
Application number	US-201514791960-A
Country	US
Kind code	B2
Filing date	Jul 6, 2015
Priority date	Sep 28, 2012
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A method of inserting a femoral prosthesis includes coupling an insertion/extraction instrument with an insertion/extraction cavity of a femoral component using a threaded member, the insertion/extraction cavity defining a cavity axis which is not parallel with a longitudinal axis defined by a proximal stem portion of the femoral prosthesis, inserting a distal end portion of the femoral prosthesis into a femur, impacting a proximal end portion of the insertion/extraction instrument, and transferring an impact force from the proximal end portion to the femoral prosthesis through the threaded member.

First claim

What is claimed is:

1. A method of inserting a femoral prosthesis comprising:
coupling an insertion/extraction instrument with an insertion/extraction cavity of a femoral component using a threaded member, the insertion/extraction cavity defining a cavity axis which is not parallel with a longitudinal axis defined by a proximal stem portion of the femoral prosthesis;
inserting a distal end portion of the femoral prosthesis into a femur;
impacting a proximal end portion of the insertion/extraction instrument; and
transferring an impact force from the proximal end portion to the femoral prosthesis through the threaded member.

2. The method of claim 1 , wherein coupling the insertion/extraction instrument with the insertion/extraction cavity comprises:
rotating the proximal end portion of the insertion/extraction instrument thereby causing rotation of the threaded member.

3. The method of claim 2 , wherein transferring the impact force comprises:
transferring the impact force through a shaft extending between the proximal end portion and the threaded member.

4. The method of claim 3 , wherein:
the shaft defines a shaft axis; and
coupling the insertion/extraction instrument with the insertion/extraction cavity comprises inserting the threaded member into the insertion/extraction cavity with the shaft axis aligned with the cavity axis.

5. The method of claim 4 , wherein coupling the insertion/extraction instrument with the insertion/extraction cavity comprises:
inserting a first alignment feature of the insertion/extraction instrument into a second alignment feature of the insertion/extraction cavity with the shaft axis aligned with the cavity axis.

6. The method of claim 5 , wherein rotating the proximal end portion of the insertion/extraction instrument causes rotation of the shaft within a housing, the method further comprising:
rotating the shaft within the housing after inserting the first alignment feature of the insertion/extraction instrument into the second alignment feature of the insertion/extraction cavity.

7. The method of claim 6 , wherein:
the housing defines a housing axis; and
coupling the insertion/extraction instrument with the insertion/extraction cavity comprises inserting the threaded member into the insertion/extraction cavity with the housing axis aligned with the cavity axis.

8. The method of claim 6 , wherein coupling the insertion/extraction instrument with the insertion/extraction cavity of a femoral component comprises:
forcing a portion of the housing against the femoral prosthesis by rotation of the threaded member.

9. The method of claim 8 , wherein forcing the portion of the housing against the femoral prosthesis comprises:
forcing the first alignment feature against a portion of the second alignment feature.

10. A method of inserting a femoral prosthesis comprising:
coupling an insertion/extraction instrument with an insertion/extraction cavity of a femoral component having a neck and a femoral head fitting using a threaded member, the insertion/extraction cavity defining a cavity axis which is not parallel with a longitudinal axis defined by a proximal stem portion of the femoral prosthesis located distally of the neck;
inserting a distal end portion of the femoral prosthesis into a femur;
impacting a proximal end portion of the insertion/extraction instrument; and
transferring an impact force from the proximal end portion to the femoral prosthesis through the threaded member.

11. The method of claim 10 , wherein coupling the insertion/extraction instrument with the insertion/extraction cavity comprises:
rotating a shaft of the insertion/extraction instrument within a housing of the insertion/extraction instrument after inserting a first alignment feature of the insertion/extraction instrument into a second alignment feature of the insertion/extraction cavity.

12. The method of claim 11 , wherein rotating the shaft comprises:
rotating the proximal end portion of the insertion/extraction instrument thereby causing rotation of the threaded member.

13. The method of claim 12 , wherein transferring the impact force comprises:
transferring the impact force through the shaft.

14. The method of claim 13 , wherein:
the shaft defines a shaft axis; and
coupling the insertion/extraction instrument with the insertion/extraction cavity comprises inserting the threaded member into the insertion/extraction cavity with the shaft axis aligned with the cavity axis.

15. The method of claim 14 , wherein:
the housing defines a housing axis; and
coupling the insertion/extraction instrument with the insertion/extraction cavity comprises inserting the threaded member into the insertion/extraction cavity with the housing axis aligned with the cavity axis.

16. The method of claim 11 , wherein coupling the insertion/extraction instrument with the insertion/extraction cavity of a femoral component comprises:
forcing a portion of the housing against the femoral prosthesis by rotation of the threaded member.

17. The method of claim 16 , wherein forcing the portion of the housing against the femoral prosthesis comprises:
forcing the first alignment feature against a portion of the second alignment feature.

Assignees

• Depuy Synthes Products Inc

Inventors

• Huff Daniel N
• Delaney Ian G
• Matta Joel M

Classifications

• A61F2002/30616

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

• A61F2002/4687

  Mechanical guides for implantation instruments · CPC title

• A61F2002/4681

  by applying mechanical shocks, e.g. by hammering · CPC title

• A61F2/367 Primary

  Proximal or metaphyseal parts of shafts (trochanteric devices connected to said proximal parts A61F2/30739) · CPC title

• A61F2/4607 Primary

  of hip femoral endoprostheses · CPC title