Glenoid implant for a shoulder prosthesis, and surgical kit

Patent metadata

Field	Value
Publication number	US-9498345-B2
Application number	US-201213363159-A
Country	US
Kind code	B2
Filing date	Jan 31, 2012
Priority date	Feb 1, 2011
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A glenoid implant for a shoulder prosthesis for implantation in the glenoid of a scapula according to embodiments of the present invention includes a central fixation element; an articular body configured for articulation with a humerus, the articular body comprising a plate, the plate comprising a side configured to be oriented toward the glenoid, the side comprising a central protrusion, wherein the central fixation element comprises a means for mechanically engaging with the central protrusion; a first means for locking rotation of the central fixation element with respect to the glenoid; and a second means for locking rotation of the articular body with respect to the glenoid.

First claim

What is claimed is:

1. A glenoid implant for a shoulder prosthesis for implantation in the glenoid of a scapula, the glenoid implant comprising:
a central fixation element having a proximal portion, an external surface, a longitudinal axis, and at least one feature extending outwardly from the external surface, each of the at least one feature extending about the longitudinal axis and being adapted to engage bone and translatably secure the central fixation element from pull-out relative to the glenoid;
an articular body configured for articulation with a humerus, the articular body comprising a plate, the plate comprising a side configured to be oriented toward the glenoid, the side comprising a central protrusion defining a recess extending between a first end located adjacent to the plate and a second end opposite the plate, the recess having a constriction between the first end and the second end, the constriction having a first inner periphery, the second end defining an opening at a distal-most edge of the central protrusion, the opening having a second inner periphery larger than the first inner periphery, the opening configured to receive the proximal portion of the central fixation element, wherein the central fixation element comprises a means for mechanically engaging with the central protrusion, and the means for mechanically engaging with the central protrusion comprises a peripheral protrusion or a peripheral groove disposed in the recess and adapted to cooperate with, respectively, a peripheral groove or a peripheral protrusion disposed on the proximal portion of the central fixation element, and wherein the articular body is adapted to be mechanically engaged with the central fixation element after the central fixation element is secured relative to the glenoid; and
a means for locking rotation of the articular body with respect to the glenoid.

2. The glenoid implant of claim 1 , wherein the means for mechanically engaging with the central protrusion is configured to cooperate with a metallic, ceramic, or synthetic articular body.

3. The glenoid implant of claim 2 , wherein the means for mechanically engaging with the central protrusion comprises a tronconical portion or a tronconical receptacle adapted to engage with a tronconical receptacle or a tronconical portion of the central protrusion.

4. The glenoid implant of claim 2 , wherein the means for mechanically engaging with the central protrusion comprises a tronconical portion or a tronconical receptacle adapted to engage in a Morse cone fashion with a tronconical receptacle or a tronconical portion of the central protrusion.

5. The glenoid implant of claim 1 , wherein the side is a first side, wherein the plate comprises a second side configured to articulate with a humerus.

6. The glenoid implant of claim 1 , wherein the central fixation element comprises the peripheral groove and the central protrusion comprises the peripheral protrusion.

7. The glenoid implant of claim 1 , wherein the central fixation element is a screw and the at least one feature adapted to engage bone comprises a threading adapted to couple the screw to the glenoid.

8. The glenoid implant of claim 7 , wherein the screw further comprises a superior portion coupled to the threading, and the superior portion of the screw includes an opening adapted to receive a tool for inserting the screw into the glenoid.

9. The glenoid implant of claim 7 , wherein the screw further comprises a superior portion coupled to the threading, and the central protrusion comprises a receptacle adapted to receive the superior portion of the screw.

10. The glenoid implant of claim 9 , wherein the superior portion of the screw comprises the peripheral groove and the receptacle comprises the peripheral protrusion.

11. The glenoid implant of claim 1 , wherein the articular body further comprises:
at least one receptacle;
an insert rotatably received by the receptacle, the insert being adapted to receive a screw, the screw being adapted to fix the articular body to the glenoid.

12. The glenoid implant of claim 1 , wherein the central protrusion has a lumen and the lumen has a maximum diameter, wherein the central fixation element has a longitudinal axis, a proximal portion, and wherein the proximal portion of the central fixation element has a maximum dimension transverse to the longitudinal axis that is smaller than the maximum diameter of the lumen such that the proximal portion can be received in the recess and a portion of the central fixation element distal of the proximal portion has a maximum dimension transverse to the longitudinal axis that is greater than the maximum diameter of the lumen.

13. The glenoid implant of claim 1 , wherein the articular body further comprises a plate and a head, the head having a recess sized to receive the plate.

14. The glenoid implant of claim 13 , where the articular body has an articular surface adapted for articulation with the humerus, and the articular surface is convex.

15. The glenoid implant of claim 1 , where the articular body has an articular surface adapted for articulation with the humerus, and the articular surface is convex.

16. The glenoid implant of claim 1 , where the articular body has an articular surface adapted for articulation with the humerus, and the articular surface is concave.

17. The glenoid implant of claim 1 , wherein the distal-most end of the recess comprises a continuous boundary about the recess.

18. The glenoid implant of claim 1 , wherein the proximal end of the central fixation element comprises a flat face with a perimeter and wherein a perimeter of a distal end of the central protrusion is greater than the perimeter of the proximal end of the central fixation element.

19. The glenoid implant of claim 1 , wherein the proximal portion of the central fixation element comprises an opening configured to receive a tool for driving the central fixation element into the bone.

20. The glenoid implant of claim 1 , wherein the central protrusion comprises the peripheral protrusion.

21. The glenoid implant of claim 20 , wherein the peripheral protrusion is a monolithic extension of the central protrusion.

22. The glenoid implant of claim 1 , wherein the constriction is positioned closer to the second end than the first end.

23. A glenoid implant comprising:
a central fixation element having an external surface, a longitudinal axis, and at least one feature extending outwardly from the external surface, each of the at least one feature extending about the longitudinal axis and being adapted to engage bone and translatably secure the central fixation element from pull-out relative to the glenoid;
an articular body configured for articulation with a humerus, the articular body comprising a hollow central protrusion comprising an interior space and a distal opening at a distal-most edge of the central protrusion, the distal opening configured to receive the central fixation element, the interior space having an area transverse to a longitudinal axis of the hollow central protrusion at the distal opening that is larger than an area transverse to the longitudinal axis at a location spaced away from the distal opening, wherein the central fixation element comprises a peripheral protrusion or a peripheral groove adapted for mechanical engagement with, respectively, a peripheral groove or a peripheral protrusion disposed in the hollow central protrusion, and wherein the articular body is adapted t

Assignees

• Burkhead Jr Wayne Z
• Boileau Pascal
• Walch Gilles
• Deransart Pierric
• Tornier Sas

Inventors

• Burkhead Jr Wayne Z
• Boileau Pascal
• Walch Gilles
• Deransart Pierric

Classifications

• A61F2002/305

  Snap connection · CPC title

• A61F2002/30367

  with additional means for preventing said rotation · CPC title

• A61F2310/00023

  Titanium or titanium-based alloys, e.g. Ti-Ni alloys · CPC title

• A61F2002/30485

  plastically deformable · CPC title

• A61F2002/30616

  Sets comprising a plurality of prosthetic parts of different sizes or orientations · CPC title