Humeral joint prosthesis

• US 20060241775A1
• Filed: 04/06/2006
• Published: 10/26/2006
• Est. Priority Date: 04/21/2005
• Status: Abandoned Application

• Current Assignee: Daniel D. Buss
• Original Assignee: Daniel D. Buss
• Inventors: Buss, Daniel D.
• Application Number:
  US11/398,909
• Publication Number:
  US 20060241775A1
• Time in Patent Office: Days
• US Class Current: 623/19.130
• CPC Class Codes: A61F 2/4003 Replacing only the epiphyseal or metaphyseal parts of the humerus, i.e. endoprosthesis not comprising an entire humeral shaft replacing only the epiphyseal or metaphyseal parts of the femur A61F2/3601
• CPC Class Codes: A61F 2/4014 Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
• CPC Class Codes: A61F 2/4059 Humeral shafts
• CPC Class Codes: A61F 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2002/30125 elliptical or oval
• CPC Class Codes: A61F 2002/30253 ellipsoidal or ovoid
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/30405 made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/4044 Connections of necks to shafts
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• 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 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/0076 ellipsoidal or ovoid

Abstract

Embodiments of the present invention relate to methods, devices, and systems for shoulder joint replacement. One embodiment of a humeral head prosthesis includes a first face for positioning against a surface of a glenoid, a second face for attachment to the stem, and an oval shaped circumference wherein a major axis is oriented between a top position and a bottom position and wherein the major axis is to be generally oriented in a superior-inferior orientation when positioned for use.

Claims

1. A humeral head prosthesis, comprising;

a first face for positioning against a surface of a glenoid;

a second face for attachment to the stem; and

an oval shaped circumference wherein a major axis is oriented between a top position and a bottom position and wherein the major axis is to be generally oriented in a superior-inferior orientation when positioned for use.

2. The prosthesis of claim 1, wherein the humeral head has an elliptical circumference.

3. The prosthesis of claim 1, wherein the humeral head has a shape of a half of an ellipsoid.

4. The prosthesis of claim 1, wherein the humeral head has a Cartesian oval shaped circumference.

5. The prosthesis of claim 1, wherein the first face has a half ellipse shaped cross-section.

6. The prosthesis of claim 1, wherein the first face has a half oblate hemisphere shaped cross-section.

7. The prosthesis of claim 1, wherein the first face has a half prolate hemisphere shaped cross-section.

8. A shoulder prosthesis, comprising:

a stem having a distal end for insertion in the superior end of a humerus; and

a humeral head including;

a first face for positioning against a surface of a glenoid; and

a second face for attachment to the stem, wherein the head has an oval shaped circumference wherein a major axis is oriented between a top position and a bottom position.

9. The prosthesis of claim 8, wherein the prosthesis further includes a flange protruding from at least one of the first and second faces.

10. The prosthesis of claim 9, wherein the flange protrudes at an angle with respect to the orientation of the second face.

11. The prosthesis of claim 8, wherein the prosthesis further includes a flange protruding out of the second face.

12. The prosthesis of claim 11, wherein the flange is positioned at a junction between the first face and the second face.

13. The prosthesis of claim 8, wherein the second face is designed to mate with a first surface of the humerus and wherein the prosthesis further includes a flange constructed and arranged to mate with a second surface of the humerus.

14. A shoulder prosthesis, comprising:

a stem having a distal end for insertion in the superior end of a humerus;

a humeral head including a first face for positioning against a surface of a glenoid, and a second face for attachment to the stem, wherein the head has an oval shaped circumference wherein a major axis is oriented between a top position and a bottom position; and

means for connecting the head to a proximal end of the stem.

15. The prosthesis of claim 14, wherein the means for connecting includes a bore in the second face of the humeral head.

16. The prosthesis of claim 14, wherein the means for connecting includes a shaft on the second face of the humeral head.

17. The prosthesis of claim 14, wherein the means for connecting is positioned non-coaxially with a central axis of the first face.

18. The prosthesis of claim 14, wherein means for connecting includes a protruding shaft on the stem having a Morse taper.

19. The prosthesis of claim 14, wherein means for connecting includes a protruding shaft on the second face having a Morse taper.

20. A shoulder prosthesis replacement kit, comprising;

a stem having a distal end for insertion in the superior end of a humerus;

a humeral head including a first face for positioning against a surface of a glenoid, and a second face for attachment to the stem, wherein the head has an oval shaped circumference wherein a major axis is oriented between a top position and a bottom position; and

a glenoid having a surface for positioning against the first face of the humeral head.

21. The prosthesis replacement kit of claim 20, wherein the surface of the glenoid for positioning against the first face of the humeral head has an oval edge.

22. The prosthesis replacement kit of claim 21, wherein the oval edge has a major axis and wherein the major axis is oriented in a superior-inferior orientation.

23. The prosthesis replacement kit of claim 20, wherein the surface of the glenoid for positioning against the first face of the humeral head has an elliptical edge.

24. The prosthesis replacement kit of claim 23, wherein the elliptical edge has a major axis and wherein the major axis is oriented in a superior-inferior orientation.

25. The prosthesis replacement kit of claim 20, wherein the surface of the glenoid for positioning against the first face of the humeral head is a complimentary surface.

26. The prosthesis replacement kit of claim 20, wherein the surface of the glenoid for positioning against the first face of the humeral head is a mating surface.

27. A method of replacing a humeral head in a patient, comprising:

attaching a prosthetic humeral head to a humerus of a patient, the prosthetic humeral head including a first face for positioning against a surface of a glenoid, and a second face, wherein the head has an oval shaped circumference wherein a major axis is oriented between a top position and a bottom position;

attaching a prosthetic glenoid surface to a glenoid of a patient;

positioning the prosthetic humeral head and the prosthetic glenoid in an adjacent orientation with respect to each other; and

repairing surrounding tissue to encapsulate the prosthetic humeral head and glenoid.

28. The method of claim 27, wherein the method further includes inserting a stem into a cavity formed in the humerus.

29. The method of claim 28, wherein attaching the prosthetic humeral head to the humerus of the patient includes attachment of the prosthetic humeral head to the stem.