Implants, systems and methods of using the same
Implants, device, systems and methods for replacing an articulation surface in a joint, for example, shoulder prostheses with stemless humeral components or stemmed humeral components. Methods for using the shoulder prostheses with stemless humeral components or stemmed humeral components are also disclosed.
1. An anchor for use in an orthopedic implant assembly, the anchor comprising:
a base including a proximal surface, an opposing distal bone contacting surface, and a central opening;
a first keel extending across a diameter of the central opening of the base in a direction opposite the proximal surface, and the first keel having a length;
a second keel extending from the base in a direction opposite the bone contacting surface, and the second keel having a length, wherein the second keel length is the same length or smaller than the length of the first keel;
a third keel extending from the base in a direction opposite the bone contacting surface, the third keel disposed medially of the first keel, and the third keel including a length, wherein the length of the third keel is the same length or smaller than the length of the first keel; and
a fourth keel extending from the base in a direction opposite the bone contacting surface, the fourth keel disposed laterally of the first keel and the fourth keel including a length, wherein the length of the fourth keel is the same length or smaller than the length of the first keel;
wherein each keel further comprises:
a proximal end; and
a distal end;
wherein the base is disposed at a constant angle relative to the proximal end of each keel.
2. The anchor of claim 1 , wherein said first keel comprises a plurality of bone engaging fins extending from said first keel.
3. The anchor of claim 2 , wherein said first keel has a constant width in a direction perpendicular to said plurality of bone engaging fins of said first keel.
4. The anchor of claim 1 , wherein said second keel comprises a plurality of bone engaging fins extending from said second keel.
5. The anchor of claim 1 , wherein said third keel comprises a plurality of bone engaging fins extending from said third keel.
6. The anchor of claim 1 , wherein said fourth keel comprises a plurality of bone engaging fins extending from said fourth keel.
7. The anchor of claim 1 , wherein each of said keels comprises a plurality of bone engaging fins extending from said keels and wherein said plurality of bone engaging fins of said second keel, third keel, and fourth keel are oriented perpendicularly relative to said plurality of bone engaging fins of said first keel.
8. The anchor of claim 7 , wherein said first keel has a constant width in a direction perpendicular to said fins of said first keel.
9. The anchor of claim 1 , wherein said first keel length is no more than 45 mm from said bone contacting surface of said base.
10. The anchor of claim 1 , wherein said first keel length is no more than 40 mm from said bone contacting surface of said base.
11. The anchor of claim 1 , wherein said first keel length is no more than 35 mm from said bone contacting surface of said base.
12. The anchor of claim 1 , wherein said first keel length is no more than 30 mm from said bone contacting surface of said base.
13. An orthopedic implant assembly, said assembly comprising:
an anchor for use in the orthopedic implant assembly, said anchor adapted to be inserted into a humeral bone, said anchor comprising:
a base, said base having a proximal surface, an opposing distal bone contacting surface, and an open center;
a first keel, said first keel extending across a diameter of said open center of said base, said first keel extending from said base in a direction opposite said proximal surface;
a second keel, said second keel extending from said base in a direction opposite said bone contacting surface, said second keel;
a third keel, said third keel extending from said base in a direction opposite said bone contacting surface, said third keel disposed medially of said first keel;
a fourth keel, said fourth keel extending from said base in a direction opposite said bone contacting surface, said fourth keel disposed laterally of said first keel,
wherein each keel further comprises a proximal end and a distal end and said base is disposed at a constant angle relative to the proximal end of each said keel; and
a humeral head, said humeral head attached to said proximal surface of said anchor.
14. The anchor of claim 13 , wherein said first keel comprises a plurality of bone engaging fins extending from said first keel.
15. The anchor of claim 14 , wherein said first keel has a constant width in a direction perpendicular to said plurality of bone engaging fins of said first keel.
16. The anchor of claim 13 , wherein said second keel comprises a plurality of bone engaging fins extending from said second keel.
17. The anchor of claim 13 , wherein said third keel comprises a plurality of bone engaging fins extending from said third keel.
18. The anchor of claim 13 , wherein said fourth keel comprises a plurality of bone engaging fins extending from said fourth keel.
19. The anchor of claim 13 , wherein each of said keels comprises a plurality of bone engaging fins extending from said keels and wherein said plurality of bone engaging fins of said second keel, third keel, and fourth keel are oriented perpendicularly relative to said plurality of bone engaging fins of said first keel.
20. The anchor of claim 13 , wherein said first keel has a constant width in a direction perpendicular to said plurality of bone engaging fins of said first keel.
21. An orthopedic implant assembly, said assembly comprising:
an anchor for use in the orthopedic implant assembly, said anchor adapted to be inserted into a humeral bone, said anchor comprising:
a base, said base having a proximal surface, an opposing distal bone contacting surface, and an open center;
a first keel, said first keel extending across a diameter of said open center of said base, said first keel extending from said base in a direction opposite said proximal surface;
a second keel, said second keel extending from said base in a direction opposite said bone contacting surface, said second keel;
a third keel, said third keel extending from said base in a direction opposite said bone contacting surface, said third keel disposed medially of said first keel;
a fourth keel, said fourth keel extending from said base in a direction opposite said bone contacting surface, said fourth keel disposed laterally of said first keel;
wherein each keel further comprises a proximal end and a distal end and said base is disposed at a constant angle relative to the proximal end of each said keel; and
an articular liner, said articular liner having a concave articular surface, said liner attached to said proximal surface of said anchor.
22. The anchor of claim 21 , wherein said first keel length is no more than 45 mm from said bone contacting surface of said base.
23. The anchor of claim 21 , wherein said first keel length is no more than 40 mm from said bone contacting surface of said base.
24. The anchor of claim 21 , wherein said first keel length is no more than 35 mm from said bone contacting surface of said base.
25. The anchor of claim 21 , wherein said first keel length is no more than 30 mm from said bone contacting surface of said base.
26. The anchor of claim 21 , wherein said first keel comprises a plurality of bone engaging fins extending from said first keel.
27. The anchor of claim 26 , wherein said first keel has a constant width in a direction perpendicular to said plurality of bone engaging fins of said first keel.
28. The anchor of claim 21 , wherein said second keel comprises a plurality of bone engaging fins extending from said second keel.
29. The anchor of claim 21 , wherein said third keel comprises a plurality of bone engaging fins extending from said third keel.
30. The anchor of claim 21 , wherein said fourth keel comprises a plurality of bone engaging fins extending from said fourth keel.
31. The anchor of claim 21 , wherein each of said keels comprises a plurality of bone engaging fins extending from said keels and wherein said fins of said second keel, third keel, and fourth keel are oriented perpendicularly relative to said plurality of bone engaging fins of said first keel.
32. The anchor of claim 31 , wherein said first keel has a constant width in a direction perpendicular to said plurality of bone engaging fins of said first keel.