Version-replicating instrument and orthopaedic surgical procedure for using the same to implant a revision hip prosthesis

Patent metadata

Field	Value
Publication number	US-10226345-B2
Application number	US-201715465240-A
Country	US
Kind code	B2
Filing date	Mar 21, 2017
Priority date	Apr 6, 2011
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

A modular femoral prosthesis for use during performance of a hip revision procedure includes a proximal body component, a distal stem component, and a locking bolt. Surgical instruments and methods for use in implanting such a modular femoral prosthesis are disclosed.

First claim

The invention claimed is:

1. A method of performing a surgical procedure to implant an orthopaedic hip prosthesis, comprising:
implanting a distal stem component into an intramedullary canal of a patient's femur,
installing a trial shaft to the proximal end of the implanted distal stem component such that an alignment key of the trial shaft is positioned in a keyway of the implanted distal stem component,
installing a discrete trial neck on the trial shaft and rotating the trial neck relative to the trial shaft so as to position the trial neck in a selected version,
locking the trial neck relative to the trial shaft in the selected version
uninstalling the trial shaft from the implanted distal stem component with the trial neck locked relative to the trial shaft in the selected version,
installing a version-replicating instrument to the proximal end of the implanted distal stem component such that an alignment key of the version-replicating instrument is positioned in the keyway of the implanted distal stem component, and
installing the trial shaft, with the trial neck locked relative to the trial shaft in the selected version, on the version-replicating instrument such that the alignment key of the trial shaft is positioned in an alignment slot of the version-replicating instrument.

2. The method of claim 1 , wherein the trial neck is installed on the trial shaft prior to installation of the trial shaft to the implanted distal stem component.

3. The method of claim 1 , wherein the trial neck is installed on the trial shaft after the trial shaft is installed to the implanted distal stem component.

4. The method of claim 1 , wherein:
the trial shaft comprises a rotatable locking screw having a number of threads formed in a distal end thereof, and
installing the trial shaft to the implanted distal stem component comprises threading the threads of the locking screw into a threaded bore of the distal stem component.

5. The method of claim 1 , further comprising:
installing a proximal body component on the version-replicating instrument, and
rotating the proximal body component so that a version of the proximal body component matches the selected version of the trial neck relative to the trial shaft.

6. The method of claim 5 , wherein the proximal body component is installed on the version-replicating instrument prior to installation of the trial shaft on the version-replicating instrument.

Assignees

• Depuy Synthes Products Inc

Inventors

• Satterthwaite Rodney E
• Muhammad William
• Carr Jonathan E

Classifications

• A61F2002/30332

  Conically- or frustoconically-shaped protrusion and recess · CPC title

• A61F2002/3674

  Connections of proximal parts to distal parts · CPC title

• A61F2002/30507

  using a threaded locking member, e.g. a locking screw or a set screw · CPC title

• A61F2002/3625

  Necks · CPC title

• A61F2/30734 Primary

  Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect · CPC title