Customized patient-specific orthopaedic instruments for component placement in a total hip arthroplasty

Patent metadata

Field	Value
Publication number	US-10034753-B2
Application number	US-201514920311-A
Country	US
Kind code	B2
Filing date	Oct 22, 2015
Priority date	Oct 22, 2015
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

A system for use in conjunction with a hip prosthesis is shown. A customized patient-specific acetabular orthopedic surgical instrument and a customized patient-specific femoral orthopedic surgical instrument are disclosed. A method for fabricating and using the orthopedic surgical instruments is also disclosed. A method for using the customized patient-specific acetabular orthopedic surgical instrument is disclosed. A method for using the customized patient-specific femoral orthopedic surgical instrument is disclosed.

First claim

The invention claimed is:

1. A system for facilitating implantation of a hip prosthesis, the system comprising:
a customized patient-specific femoral surgical instrument including a collar sized to fit around a neck of the patient's femur, and a first alignment guide coupled to the collar, the first alignment guide including a first elongated body extending outwardly from the collar,
an acetabular cup component defining a cup axis extending away from the acetabular cup component, and
a customized patient-specific acetabular surgical instrument including:
a body having (i) an inner surface defining a cylindrical passageway configured to receive the acetabular cup component, and (ii) a bone-facing surface having a customized patient-specific negative contour configured to receive a corresponding positive counter of the patient's coxal bone, and
a second alignment guide coupled to the body, the second alignment guide including a second elongated body extending outwardly from the body and defining an alignment axis positioned to indicate a predetermined position of the acetabular cup component in the patient's coxal bone,
wherein when the customized patient-specific femoral surgical instrument is coupled to the patient's femur and the customized patient-specific acetabular surgical instrument is coupled to the patient's coxal bone, the first elongated body of the customized patient-specific femoral surgical instrument extends toward the customized patient-specific acetabular surgical instrument and the second elongated body of the customized patient-specific acetabular surgical instrument extends toward the customized patient-specific femoral surgical instrument such that the first alignment guide of the customized patient-specific femoral surgical instrument and the second alignment guide of the customized patient-specific acetabular surgical instrument cooperate to provide a visual indication of a planned position of the hip prosthesis.

2. The system of claim 1 , wherein the alignment axis of the alignment guide is positioned according to a predetermined version angle and a predetermined inclination angle of the acetabular cup prosthesis.

3. The system of claim 1 , wherein the acetabular cup component includes a base and a body extending away from the base, and the cup axis extends away from the acetabular cup component perpendicular to the base.

4. The system of claim 1 , further includes one or more sensors configured to determine a position of the customized patient-specific acetabular surgical instrument relative to the coxal bone, wherein each of the one or more sensors are positioned in the customized patient-specific acetabular surgical instrument based on a predetermined sensor position.

5. The system of claim 4 , wherein the one or more sensors cooperate with other sensors positioned on one or more surgical instruments and are configured to determine the position and orientation of the one or more surgical instruments relative to the position and orientation to the patient's femur.

6. The system of claim 4 , wherein the one or more sensors are configured to determine the position and an orientation of the customized patient-specific acetabular surgical instrument relative to a customized patient-specific femoral surgical instrument positioned on a patient's femur, wherein the customized patient-specific femoral surgical instrument includes one or more additional sensors configured to interact with the one or more sensors of the customized patient-specific acetabular surgical instrument.

7. The system of claim 1 , further comprising:
a femoral stem component defining a trunnion axis extending along a trunnion and a neck of the femoral stem component,
wherein the collar has: (i) a bone-facing surface having a customized patient-specific negative contour configured to receive a corresponding positive counter of the patient's femur, and (ii) a top surface defining a resection plane surface configured to guide a surgical instrument as the patient's femur is resected, and
the alignment guide defines a femoral alignment axis positioned to indicate a predetermined angle of the femoral stem component.

8. The system of claim 7 , wherein the alignment guide of the customized patient-specific femoral surgical instrument is positioned to indicate a predetermined offset of the femoral stem component.

Assignees

• Depuy Synthes Products Inc

Inventors

• Dressler Matthew R
• Sherman Jason T

Classifications

• A61F2/34 Primary

  Acetabular cups · CPC title

• A61F2/3609

  Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts (A61F2/3601 takes precedence) · CPC title

• A61B17/1746

  for the acetabulum · CPC title

• A61B17/175

  for preparing the femur for hip prosthesis insertion · CPC title

• A61B17/1666

  for the acetabulum · CPC title