Trial prosthesis system

Patent metadata

Field	Value
Publication number	US-2017189206-A1
Application number	US-201515325941-A
Country	US
Kind code	A1
Filing date	Jul 22, 2015
Priority date	Jul 23, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

According to various embodiments, a trial system ( 100 ) and instruments can be used to assist in confirming that a planned procedure is achieved. In various embodiments, the trial or provisional portions can include markings ( 110 ) on a trial or provisional portion to compare to one or more implanted members to ensure an planned position is achieved.

First claim

1 . A system for confirming a selected configuration of a first portion and a second portion of a prosthesis system, comprising:
a trial femoral head member having an external surface configured to be at least partially received within an acetabular component; an indicator viewable by a user on an exterior surface of the trial femoral head member; and a provisional connection portion configured to provisionally connect to a portion of a femoral member.

2 . The system of claim 1 , the femoral member comprising:
a femoral stem configured to be implanted into a femur and interconnect with the trial femoral head.

3 . The system of claim 1 , further comprising:
an acetabular system including the acetabular component configured to be implanted into an acetabulum.

4 . The system of claim 3 , wherein the indicator is aligned with a selected portion of the acetabular component when a single selected configuration of the femoral stem relative to the acetabular system is achieved.

5 . The system of claim 3 , wherein the indicator illustrates a range of configurations relative to at least a single selected configuration of the femoral stem relative to the acetabular system.

6 . The system of claim 5 , wherein the indicator has a width of greater than about 3 mm.

7 . The system of claim 5 , wherein the indicator includes a width to indicate an angular variation of about 1 degree to about 5 degrees from a selected single planned configuration of the femur and the pelvis.

8 . The system of claim 3 , wherein the indicator is configured to be viewed relative to a rim of the acetabular system to indicate whether a predetermined configuration of the femur and the pelvis has been achieved.

9 . A system for confirming a selected configuration of a first portion and a second portion of a prosthesis system, comprising:
a femoral neck portion configured to be interconnected with a femur; an acetabular component having an articulating surface; and a trial femoral head member having an external surface configured to provisionally engage with the articulating surface, wherein the trial femoral head includes:
an annular indicator formed on an exterior surface of the trial femoral head member configured to be viewed relative to the acetabular component when the trial femoral head is provisionally engaging the acetabular component.

10 . The system of claim 9 , wherein the trial femoral head further includes a bore formed in the trial femoral head to provisionally connect the trial femoral head to the femoral neck.

11 . The system of claim 9 , further comprising:
an acetabular shell configured to be implanted into an acetabulum; wherein the acetabular component is fixed to the acetabular shell.

12 . The system of claim 9 , wherein the acetabular component has a rim and the annular indicator is configured to be aligned with the rim at a selected configuration of the trial femoral head relative to the acetabular component.

13 . The system of claim 9 , wherein the acetabular component has a rim that defines a plane, wherein the plane intersects the annular indicator within a selected range of angular orientations of the femoral neck relative to the acetabular component.

14 . A method for confirming a selected configuration of a first portion and a second portion of a prosthesis system, comprising:
evaluating a selected final configuration of a femur and a pelvis; and forming a trial femoral head having an indicator on an exterior surface to align with a rim of an acetabular component when the selected final configuration of the femur and the pelvis is achieved; wherein the alignment of the indicator with the rim confirms that the selected final configuration of the femur and the pelvis is achieved.

15 . The method of claim 14 , further comprising:
evaluating pre-procedure data of a single patient to determine the selected final configuration of the femur and the pelvis; and determining a location on the exterior surface to form the indicator to indicate the determined selected final configuration of the femur and the pelvis.

16 . The method of claim 15 , further comprising:
forming the trial femoral head for the single patient with the indicator at the determined location.

17 . The method of claim 16 , wherein the pre-procedure data includes image data of the single patient.

18 . The method of claim 16 , wherein forming the trial femoral head includes forming an indicator to identify a single configuration of the femur and the pelvis.

19 . The method of claim 16 , wherein forming the trial femoral head includes forming an indicator to identify a safe zone of positions of the femur relative to the pelvis relative to a single configuration of the femur and the pelvis.

20 . The method of claim 14 , further comprising:
forming the indicator to be an annular mark on the exterior surface.

Assignees

• Biomet Mfg Llc

Inventors

• Davenport Austen
• Bailey Kirk J

Classifications

• A61F2002/30617

  Visible markings for adjusting, locating or measuring · CPC title

• A61F2/3609

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

• A61F2/4684 Primary

  Trial or dummy prostheses · CPC title

• A61F2/4657

  Measuring instruments used for implanting artificial joints (for surgical instruments A61B90/06) · CPC title

• A61F2002/3611

  Heads or epiphyseal parts of femur · CPC title