Alignment device for modular implants and method

• US 7,022,141 B2
• Filed: 12/20/2002
• Issued: 04/04/2006
• Est. Priority Date: 12/20/2002
• Status: Expired due to Term

• Current Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Products Incorporated (Johnson & Johnson)
• Inventors: Dwyer, Kimberly A., Daniels, David, Parker, Brad
• Primary Examiner(s): Stewart, Alvin J.
• Application Number:
  US10/327,196
• Publication Number:
  US 20040122437A1
• Time in Patent Office: 1,201 Days
• Field of Search: 623/22.12, 623/22.11, 606/99, 606/104, 606/96, 606/98, 606 79- 80, 606/53
• US Class Current: 623/22.12
• CPC Class Codes: A61B 2090/067 for measuring angles
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/367 Proximal or metaphyseal parts of shafts trochanteric devices connected to said proximal parts A61F2/30739
• CPC Class Codes: A61F 2/3676 Distal or diaphyseal parts of shafts
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/3054 about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
• CPC Class Codes: A61F 2002/30594 slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30738 Sleeves
• CPC Class Codes: A61F 2002/30827 Plurality of grooves
• CPC Class Codes: A61F 2002/30886 externally-threaded
• CPC Class Codes: A61F 2002/3611 Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3625 Necks
• CPC Class Codes: A61F 2002/365 Connections of heads to necks
• CPC Class Codes: A61F 2002/3674 Connections of proximal parts to distal parts
• CPC Class Codes: A61F 2002/3686 bent
• CPC Class Codes: A61F 2002/4668 for measuring angles
• CPC Class Codes: A61F 2002/4687 Mechanical guides for implantation instruments
• CPC Class Codes: A61F 2220/0033 : made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2220/0041 : using additional screws, bolts, dowels or rivets, e.g. connecting screws

Abstract

An instrument (200) for at least one of replicating and measuring the angular orientation of a first component (54) of a prosthesis (51) to a second component (52) of the prosthesis (51) for use in joint arthroplasty. The instrument (200) includes a first member (202) for cooperation with the first component (54), a second member (210) for cooperation with the second component (52), and a feature (220). The feature (220) cooperates with the first member (202) and the second member (210) for at least one of replicating and measuring the relative angular orientation of the first component (54) with respect to the second component (52).

Claims

1. An instrument for at least one of replicating and measuring the relative angular orientation of a first component of a prosthesis to a second component of the prosthesis for use in joint arthroplasty, said instrument comprising:

a first member for cooperation with the first component;

a second member for cooperation with the second component; and

a feature cooperating with said first member and said second member for at least one of replicating and measuring the relative angular orientation of the first component with respect to the second component,

wherein said first member defines a first member rotational centerline thereof, and

wherein said second member defines a second member rotational centerline thereof, the first member rotational centerline and the second member rotational centerline are coincident with each other.

2. The instrument of claim 1, wherein said feature comprises indicia on at least one of said first member and said second member.

3. The instrument of claim 1:

wherein said first member defines one of a recess or a protrusion thereof for engagement with the first component; and

wherein said second member defines one of a yoke, protrusion or a recess thereof for engagement with the second component.

4. The instrument of claim 1, wherein said feature comprises:

a plurality of first indicia on at least one of said first member and said second member; and

a second indicia of the other of said first member and said second member.

5. The instrument of claim 1, wherein said feature comprises a body, at least one of said first member and said second member being moveably connected to said body.

6. The instrument of claim 1, further comprising a body defining an opening therethrough, a portion of said first member being rotatively positionable in the opening, said second member connected to said body.

7. The instrument of claim 6, wherein said first member is axially moveable with respect to the opening.

8. An instrument for at least one of replicating and measuring the relative angular orientation of a first component of a prosthesis to a second component of the prosthesis for use in joint arthroplasty, said instrument comprising:

a first member for cooperation with the first component;

a second member for cooperation with the second component; and

a feature cooperating with said first member and said second member for at least one of replicating and measuring the relative angular orientation of the first component with respect to the second component, further comprising a lock for selectively preventing relative motion between said first member and said second member.

9. An instrument for at least one of replicating and measuring the relative angular orientation of a first component of a prosthesis to a second component of the prosthesis for use in joint arthroplasty, said instrument comprising:

a first member for cooperation with the first component;

a second member for cooperation with the second component; and

a feature cooperating with said first member and said second member for at least one of replicating and measuring the relative angular orientation of the first component with respect to the second component,

wherein said feature comprises a body, at least one of said first member and said second member being moveably connected to said body, wherein said first member, said second member and said body defining a longitudinal axis of rotation, wherein one of said first member and said second member may be rotatably keyed with said body, wherein the other of said first member and said second member is selectably rotatably movable with respect to said body, and wherein the relative angular position of said first member with respect to said second member about the longitudinal axis corresponds to the angular orientation of the first component with respect to the second component when said first member is in cooperation with the first component and when said second member is in cooperation with the second component.

10. An instrument for at least one of replicating and measuring the relative angular orientation of a first component of a prosthesis to a second component of the prosthesis for use in joint arthroplasty, said instrument comprising:

a first member for cooperation with the first component;

a second member for cooperation with the second component; and

a feature cooperating with said first member and said second member for at least one of replicating and measuring the relative angular orientation of the first component with respect to the second component, wherein said feature comprises a body, at least one of said first member and said second member being moveably connected to said body, wherein said second member is pivotably connected to said body.

11. An instrument for at least one of replicating and measuring the relative angular orientation of first component of a prosthesis to a second component of a femoral stem assembly of a hip prosthesis for use in total hip arthroplasty, said instrument comprising:

a first member for cooperation with the first component;

a second member for cooperation with the second component; and

a feature cooperating with said first member and said second member for at least one of replicating and measuring the relative angular position of the first member with respect to the second component,

wherein said first member defines a first member rotational centerline thereof, and

wherein said second member defines a second member rotational centerline thereof, the first member rotational centerline and the second member rotational centerline are coincident with each other.

12. The instrument of claim 11, wherein said feature comprises indicia on at least one of said first member and said second member.

13. The instrument of claim 11:

wherein the first component includes a distal component;

wherein said first member defines a protrusion thereof for engagement with the distal component;

wherein the second component includes a neck component; and

wherein said second member defines a yoke thereof for engagement with the neck component.

14. The instrument of claim 11, wherein said feature comprises:

a plurality of first indicia on at least one of said first member and said second member; and

a second indicia of the other of said first member and said second member.

15. The instrument of claim 11, further comprising a body defining an opening therethrough, a portion of said first member being rotatively positionable in the opening, said second member connected to said body.

16. The instrument of claim 15, wherein said first member is axially moveable with respect to the opening.

17. An instrument for at least one of replicating and measuring the relative angular orientation of first component of a prosthesis to a second component of a femoral stem assembly of a hip prosthesis for use in total hip arthroplasty, said instrument comprising:

a first member for cooperation with the first component;

a second member for cooperation with the second component; and

a feature cooperating with said first member and said second member for at least one of replicating and measuring the relative angular position of the first member with respect to the second component, further comprising a lock for selectively preventing relative motion between said first member and said second member.

18. An instrument for at least one of replicating and measuring the relative angular orientation of first component of a prosthesis to a second component of a femoral stem assembly of a hip prosthesis for use in total hip arthroplasty, said instrument comprising:

a first member for cooperation with the first component;

a second member for cooperation with the second component; and

a feature cooperating with said first member and said second member for at least one of replicating and measuring the relative angular position of the first member with respect to the second component, further comprising a body defining an opening therethrough, a portion of said first member being rotatively positionable in the opening, said second member connected to said body, wherein said second member is pivotably connected to said body.