Adjustable provisional articulating device

• US 5,569,263 A
• Filed: 01/12/1995
• Issued: 10/29/1996
• Est. Priority Date: 01/12/1995
• Status: Expired due to Fees

• Current Assignee: Ramon B. Gustilo
• Original Assignee: Orthopaedic Innovation Centre Inc.
• Inventors: Hein, Todd J.
• Primary Examiner(s): Buiz, Michael Powell
• Assistant Examiner(s): MARKOW, SCOTT
• Application Number:
  US08/371,844
• Time in Patent Office: 656 Days
• Field of Search: 606/102, 606/84, 606/85, 606/86, 606/79, 623/22, 623/23, 403/104, 403/106, 403/109
• US Class Current: 606/102
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1666 for the acetabulum
• CPC Class Codes: A61B 17/1668 for the upper femur A61B17/164 takes precedence
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/1684 for the shoulder
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30479 using a locking ball
• CPC Class Codes: A61F 2002/30487 Circumferential cooperating grooves and beads on cooperating lateral surfaces of a mainly longitudinal connection
• CPC Class Codes: A61F 2002/30505 spring biased
• CPC Class Codes: A61F 2002/3055 for adjusting length
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• 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 2002/3652 Connections of necks to shafts
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements

Abstract

The present invention relates to an adjustable provisional device for aligning a joint center distance of a joint prosthesis to a natural joint center distance. The device includes a neck having a groove and a main body with a bore for receiving the neck.

Claims

1. An adjustable provisional device for aligning a joint center distance of a joint prosthesis to a natural joint center distance comprising:

a bearing;

a neck attachable to the bearing, the neck having a plurality of grooves cir comferential space apart from one another along the length of the neck; and

a main body with a bore for receiving the neck; and

a retaining mechanism attached to the main body for retaining the neck in the main body at one of the grooves.

2. The device of claim 1, wherein the main body is a cutting instrument.

3. The device of claim 1, wherein the main body is a broach.

4. The device of claim 1 wherein the bearing is reversibly attachable to the neck.

5. The device of claim 4 wherein the bearing has a bore for receiving the neck.

6. The device of claim 1 wherein the main body includes a clasp mechanism attached at the bore for retaining the neck at one of the grooves of the plurality of grooves.

7. The device of claim 6 wherein the clasp mechanism includes a U-shaped wafer, the water in reversible contact with the neck at a notch in the body and a spring in communication with the U-shaped wafer.

8. The device of claim 1 wherein the bearing includes a retaining mechanism for reversibly retaining the neck.

9. The device of claim 8 wherein the retaining mechanism includes a ball reversibly positionable in one of the grooves of the plurality of grooves and a spring in communication with the ball.

10. The device of claim 1 wherein the bearing is a prosthetic hip bearing.

11. The device of claim 1 wherein the bearing is a prosthetic shoulder bearing.

12. The device of claim 1 wherein the bearing is a prosthetic knee bearing.

13. A device for provisionally aligning a prosthetic bearing and a neck comprising:

a neck component attachable to the bearing and having a plurality of grooves spaced apart along the length of the neck; and

a main body including a bore for receiving the neck;

a locking mechanism on the body for locking the neck to the body that includes a clasp component contacting the neck component at one of the grooves of the plurality of grooves, the clasp component including a U-shaped wafer in reversible contact with the neck, the water at a notch in the body and a spring in communication with the U-shaped wafer.

14. A method for adjustably determining neck length of a prosthetic implant comprising:

providing a neck component wherein the neck component has a first groove and a second groove spaced along the length of the neck;

providing a main body with a bore for receiving the neck component wherein the main body includes a clasp mechanism attached to the main body at the bore for retaining the neck at one of the grooves, wherein the clasp mechanism includes a U-shaped wafer in reversible contact with the neck at a notch and a spring in communication with the U-shaped wafer;

retaining the neck component in the bore of the main body at the first groove; and

moving the neck component laterally so the clasp mechanism receives the neck at the second groove.

15. An adjustable provisional device for aligning a joint center distance of a joint prosthesis to a natural joint center distance, comprising:

a bearing;

a neck attachable to the bearing, the neck having a plurality of spaced a part, cir cumferential grooves;

a main body with a bore terminating an annulus for receiving the neck wherein the main body includes a clasp mechanism attached to the main body at the annulus, the clasp mechanism including a U-shaped wafer in reversible contact with the neck the wafer at the and a spring in communication with the U-shaped wafer, wherein the clasp mechanism retains the neck at one of the grooves of the plurality of grooves.