Humeral implant for minimally invasive shoulder replacement surgery

• US 20070016305A1
• Filed: 09/25/2006
• Published: 01/18/2007
• Est. Priority Date: 08/11/2003
• Status: Active Application

• Current Assignee: Steven Chudik
• Original Assignee: Steven Chudik
• Inventors: Chudik, Steven
• Application Number:
  US11/525,629
• Publication Number:
  US 20070016305A1
• Time in Patent Office: Days
• US Class Current: 623/19.140
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1606 of forceps type, i.e. having two jaw elements moving relative to each other
• CPC Class Codes: A61B 17/1617 with mobile or detachable parts
• CPC Class Codes: A61B 17/1637 Hollow drills or saws producing a curved cut, e.g. cylindrical A61B10/025, A61B17/1695 take precedence
• CPC Class Codes: A61B 17/1684 for the shoulder
• CPC Class Codes: A61B 17/1703 using imaging means, e.g. by X-rays
• CPC Class Codes: A61B 17/1721 for applying pins along or parallel to the axis of the femoral neck
• CPC Class Codes: A61B 17/1735 for rasps or chisels
• CPC Class Codes: A61B 17/1778 for the shoulder
• CPC Class Codes: A61B 17/8875 Screwdrivers, spanners or wrenches
• CPC Class Codes: A61B 2090/061 for measuring dimensions, e.g. length
• CPC Class Codes: A61B 2090/08021 of the patient or his organs
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• 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 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2/4612 of shoulders
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30934 Special articulating surfaces
• CPC Class Codes: A61F 2002/4018 Heads or epiphyseal parts of humerus
• CPC Class Codes: A61F 2002/4635 : using minimally invasive surgery
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00131 : Tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures

Abstract

The present invention provides a method and devices for shoulder replacement surgery that spares the rotator cuff. The method utilizes two anterosuperior passages to gain access to the glenohumeral joint, neither of which requires transaction of the rotator cuff. In addition a transhumeral portal created through the second anterosuperior passage for use as a working tunnel. Specialized instruments and implants are provided to work through both the anterosuperior passage as well as the transhumeral portal.

Claims

1. A humeral implant comprising a first component removably attached to a second component.

2. The humeral implant of claim 1 wherein said first component is a humeral surface and said second component is a removably attachable stem.

3. The implant of claim 2 wherein said humeral surface has a coronal radius of curvature and an axial radius of curvature.

4. The implant of claim 3 wherein said coronal radius of curvature has a range of 10 to 50 mm.

5. The implant of claim 3 wherein said axial radius of curvature has a range of from 10 to 50 mm.

6. The implant of claim 3 wherein said humeral surface has a depth with a range of from 5 to 40 mm.

7. The implant of claim 3 wherein said humeral surface has a thickness with a range of from 0.1 to 10 mm.

8. The implant of claim 3 wherein a ratio of a depth of said humeral surface to said coronal radius of curvature is from about 0.7 to about 0.9.

9. The implant of claim 3 wherein said humeral surface is spherically or elliptically shaped.

10. The implant of claim 3 wherein said humeral surface is made of a material selected from the group consisting of cobalt chrome alloy, ceramic, metal, and magnet materials.

11. The implant of claim 3 wherein said humeral surface further comprises fins or spikes on a concave undersurface of said humeral surface.

12. The implant of claim 3 further comprising a concave undersurface for bony ingrowth material.

13. The implant of claim 3 wherein said humeral surface has a smooth articulating surface.

14. The implant of claim 3 wherein said attachable stem has a diameter with a range of from 0.1 to 5.0 cm.

15. The implant of claim 14 wherein said attachable stem is made of a material selected from the group consisting of titanium, stainless steel, tantalum, porous metal and trabecular metal.

16. The implant of claim 15 wherein said removably attached stem further comprises a smooth, textured or threaded surface.

17. The implant of claim 16 wherein said removably attached stem is round, square, or triangular.

18. The implant of claim 17 wherein said removably attached stem further comprises fins.

19. The implant of claim 17 wherein said removably attached stem further comprises a bony ingrowth surface.

20. The implant of claim 2 wherein said removably attached stem has a variable length wherein said stem extends from a lateral cortex of said humerus to a center of a head of said humerus.

21. The implant of claim 2 wherein said humeral surface connects to said removably attached stem.

22. The implant of claim 21 wherein said humeral surface connects to said removably attached stem by a technique selected from the group consisting of morse taper, and a screw.

23. A humeral head surface protective guard comprising a protective surface.

24. The protective guard of claim 23 further comprising a handle.

25. The protective guard of claim 23 wherein said protective surface comprises a shell that is centrally cannulated.

26. The protective guard of claim 25 wherein said protective surface has a thickness with a range of from 0.1 to 2.0 mm.

27. A glenohumeral joint comprising a transhumeral portal along a central axis of a neck of a proximal humerus and an implant.

28. The glenohumeral joint of claim 27 wherein said implant is a humeral implant

29. A repaired humerus bone comprising a modular implant with a humeral surface and a stem, wherein said stem is anchored in the epiphyseal-metaphyseal portion of said humerus bone.

30. The repaired humerus bone of claim 29 wherein said stem has a diameter with a range of from 0.1 to 5.0 cm.

31. The repaired humerus bone of claim 30 wherein said stem is linear.

32. A humeral implant comprising a humeral surface component and no stem.