Reverse shoulder humeral adapter trays
View Patent ↗Disclosed herein are components of a reverse shoulder prosthesis. In an embodiment, a reverse shoulder prosthesis includes a humeral adapter tray configured to sit near a resected surface of a humerus, the humeral adapter tray comprising: a cavity; a central bore; and a distal face including a boss, the boss: (i) configured as an extension of the distal face, (ii) posteriorly offset from the central bore by at least 10 mm, and (iii) configured to engage a humeral stem; and a humeral liner comprising: a distal rim configured to sit within the cavity of the humeral adapter tray; and a concave articulating surface configured to mate with a convex articulating surface of a glenosphere. In an embodiment, the boss, in addition to being posteriorly offset, is superiorly offset from the central bore by at least 8 mm. In an embodiment, the reverse shoulder a humeral stem which engages the boss.
1. A reverse shoulder prosthesis comprising:
a humeral adapter tray configured to sit near a resected surface of a humerus, the humeral adapter tray comprising:
a cavity;
a central bore; and
a distal face including a boss, the boss:
(i) configured as an extension of the distal face,
(ii) posteriorly offset from the central bore by at least 10 mm, and
(iii) configured to engage a humeral stem; and
a humeral liner comprising:
a distal rim configured to sit within the cavity of the humeral adapter tray; and
a concave articulating surface configured to mate with a convex articulating surface of a glenosphere.
2. The reverse shoulder prosthesis of claim 1 wherein the posteriorly offset boss is configured to posteriorly shift a position of the humerus in order to:
(i) increase a wrapping angle of a deltoid muscle of a shoulder so as to result in joint stability,
(ii) tension muscles of a shoulder so as to result in joint stability and improved muscle function, and
(iii) increase moment arms of internal and external rotators of a shoulder so as to result in improved muscle function.
3. The reverse shoulder prosthesis of claim 1 wherein the humeral adapter tray includes an anti-rotation feature.
4. The reverse shoulder prosthesis of claim 1 wherein the humeral liner includes an anti-rotation feature.
5. The reverse shoulder prosthesis of claim 1 wherein the humeral adapter tray features a dual locking mechanism.
6. The reverse shoulder prosthesis of claim 1 wherein the humeral liner features a dual locking mechanism.
7. The reverse shoulder prosthesis of claim 1 wherein the boss is posteriorly offset from the central bore by a distance ranging from at least 10 mm to 25 mm.
8. The reverse shoulder prosthesis of claim 1 wherein the boss, in addition to being posteriorly offset, is superiorly offset from the central bore by at least 8 mm.
9. The reverse shoulder prosthesis of claim 8 wherein the boss is superiorly offset from the central bore by a distance ranging from at least 8 mm to 25 mm.
10. A reverse shoulder prosthesis comprising:
a glenoid plate;
a glenosphere;
a humeral stem;
a humeral adapter tray configured to sit near a resected surface of a humerus, the humeral adapter tray comprising:
a cavity;
a central bore; and
a distal face including a boss, the boss:
(i) configured as an extension of the distal face,
(ii) posteriorly offset from the central bore by at least 10 mm, and
(iii) configured to engage a humeral stem; and
a humeral liner comprising:
a distal rim configured to sit within the cavity of the humeral adapter tray; and
a concave articulating surface configured to mate with a convex articulating surface of a glenosphere.
11. The reverse shoulder prosthesis of claim 10 wherein the posteriorly offset boss is configured to posteriorly shift a position of the humerus in order to:
(i) increase a wrapping angle of a deltoid muscle of a shoulder so as to result in joint stability,
(ii) tension muscles of a shoulder so as to result in joint stability and improved muscle function, and
(iii) increase moment arms of internal and external rotators of a shoulder so as to result in improved muscle function.
12. The reverse shoulder prosthesis of claim 10 wherein the humeral adapter tray includes an anti-rotation feature.
13. The reverse shoulder prosthesis of claim 10 wherein the humeral liner includes an anti-rotation feature.
14. The reverse shoulder prosthesis of claim 10 wherein the humeral adapter tray features a dual locking mechanism.
15. The reverse shoulder prosthesis of claim 10 wherein the humeral liner features a dual locking mechanism.
16. The reverse shoulder prosthesis of claim 10 wherein the boss is posteriorly offset from the central bore by a distance ranging from at least 10 mm to 25 mm.
17. The reverse shoulder prosthesis of claim 10 wherein the boss, in addition to being posteriorly offset, is superiorly offset from the central bore by at least 8 mm.
18. The reverse shoulder prosthesis of claim 17 wherein the boss is superiorly offset from the central bore by a distance ranging from at least 8 mm to 25 mm.
19. A reverse shoulder prosthesis comprising:
a humeral adapter tray configured to sit near a resected surface of a humerus, the humeral adapter tray comprising:
a cavity;
a central bore; and
a distal face including a boss, the boss:
(i) configured as an extension of the distal face,
(ii) superiorly offset from the central bore by at least 8 mm, and
(iii) configured to engage a humeral stem; and
a humeral liner comprising:
a distal rim configured to sit within the cavity of the humeral adapter tray; and
a concave articulating surface configured to mate with a convex articulating surface of a glenosphere.
20. The reverse shoulder prosthesis of claim 19 wherein the boss, in addition to being superiorly offset, is posteriorly offset from the central bore by at least 10 mm.