Glenoid implant for a shoulder prosthesis, and surgical kit
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.
1. A glenoid implant for implantation in a glenoid, the glenoid implant comprising:
a fixation element comprising a body having a proximal end, a distal end, and a longitudinally-extending recess extending distally from the proximal end and through the distal end of the body, the recess centered about a longitudinal axis of the fixation element, the fixation element further comprising a groove disposed in the recess;
an articular body configured for articulation with a humerus, the articular body comprising a plate and a protrusion integrally formed with the plate, the plate extending radially outward beyond an outermost periphery of the proximal end of the fixation element, the articular body further comprising a peripheral projection extending radially outward from the protrusion, wherein the fixation element and the protrusion are configured for mechanical engagement when the groove cooperates with the peripheral projection, the peripheral projection configured to undergo flexible deformation when placed into engagement with the groove.
2. The glenoid implant of claim 1 , further comprising a locking mechanism configured to lock rotation of the articular body with respect to the glenoid.
3. The glenoid implant of claim 2 , wherein the locking mechanism is a lateral post.
4. The glenoid implant of claim 1 , wherein the fixation element comprises a locking feature configured to deter rotation of the fixation element with respect to the glenoid.
5. The glenoid implant of claim 1 , wherein the protrusion comprises a superior portion and an inferior portion, the inferior portion comprising a circular cross-section that is smaller in diameter than the superior portion.
6. The glenoid implant of claim 1 , wherein the fixation element comprises surface features on an external surface of the fixation element configured to fixate the articular body to the glenoid.
7. The glenoid implant of claim 1 , wherein a superior portion of the recess is tronconical and a superior portion of the protrusion is tronconical.
8. The glenoid implant of claim 1 , wherein a superior portion of the recess is cylindrical and a superior portion of the protrusion is cylindrical.
9. The glenoid implant of claim 1 , wherein the fixation element comprises a tapered distal end.
10. The glenoid implant of claim 1 , wherein a distal portion of the recess is threaded and configured to receive a screw.
11. The glenoid implant of claim 1 , wherein the fixation element comprises a flared-proximal opening in the proximal end of the fixation element.
12. The glenoid implant of claim 1 , wherein the fixation element and the articular body comprise different materials.