SHOULDER PROSTHESIS COMPONENTS AND ASSEMBLIES

1 . An instrument to insert a humeral anchor, comprising:

a handle including a shaft extending from a first end to a second end;

a manual grip at the first end configured to rotate the shaft; and

a humeral anchor grip at the second end,

wherein the handle is configured to actuate the humeral anchor grip between a first configuration to apply a radially outward force to an interior surface of the humeral anchor and a second configuration to separate the humeral anchor grip from the interior surface of the humeral anchor.

2 . The instrument of claim 1 , wherein the humeral anchor grip includes an expansion disc having a peripheral surface configured to engage the interior surface of the humeral anchor and a slot configured to receive a wedge member to enlarge the peripheral surface when the humeral anchor grip is in the first configuration.

3 . The instrument of claim 2 , wherein the expansion disc is configured to expand radially outward and contract radially inward based on a force from the wedge member.

4 . The instrument of claim 1 , wherein the radially outward force is generated by rotating the manual grip to actuate the humeral anchor grip.

5 . The instrument of claim 2 , wherein

the expansion disc includes a central opening, and

the slot passes through the central opening and defines an outer gap in the expansion disc.

6 . The instrument of claim 2 , wherein the expansion disc includes a thinned torsional spring section around the peripheral surface to reduce torque while enlarging the peripheral surface.

7 . The instrument of claim 1 , further comprising a bolt disposed through an opening of an expansion disc, the bolt threadably engaged with the shaft at the second end such that rotation of the shaft draws a head of the bolt proximally to bear against the opening to enlarge a slot of the expansion disc to apply the radially outward force.

8 . The instrument of claim 1 , wherein the humeral anchor grip includes an expansion disc that is configured to engage a groove of the humeral anchor when the expansion disc is expanded by the radially outward force.

9 . The instrument of claim 8 , wherein the expansion disc is configured to be disengaged from and not apply a radially outward force on the groove of the humeral anchor when the humeral anchor grip is in the second configuration.

10 . The instrument of claim 7 , further comprising a faceplate including at least one lug extending distally from the faceplate and through the slot of the expansion disc, wherein the lug includes a wider head engaging a back side of the expansion disc.

11 . The instrument of claim 1 , wherein the expandable grip includes a split collet having a peripheral surface configured to engage the interior surface of the humeral anchor and an opening configured to receive a wedge member to enlarge the peripheral surface when the humeral anchor grip is in the first configuration.

12 . The instrument of claim 11 , wherein the split collet is configured to expand radially outward and contract radially inward based on a force from the wedge member.

13 . The instrument of claim 11 , wherein the split collet further includes two substantially perpendicular slots centered on the opening.

14 . A humeral anchor insertion instrument, comprising:

an elongate shaft having a first end and a second end;

a handle disposed at the first end of the elongate shaft; and

an expandable grip disposed at the second end of the elongate shaft,

wherein the handle is configured to actuate the expandable grip between a first configuration to apply a radially outward force to an interior surface of a humeral anchor and a second configuration to separate the expandable grip from the interior surface of the humeral anchor.

15 . The humeral anchor insertion instrument of claim 14 , wherein actuation of the expandable grip is generated by rotating the handle in a first direction and the radially outward force is relaxed by rotating the handle in a second direction.

16 . The humeral anchor insertion instrument of claim 14 , wherein the expandable grip includes an expansion disc having a peripheral surface configured to engage the interior surface of the humeral anchor and a slot configured to receive a wedge member to enlarge the peripheral surface when the expandable grip is in the first configuration.

17 . The humeral anchor insertion instrument of claim 14 , wherein the expandable grip includes a split collet having a peripheral surface configured to engage the interior surface of the humeral anchor and an opening configured to receive a wedge member to enlarge the peripheral surface when the expandable grip is in the first configuration.

18 . The humeral anchor insertion instrument of claim 17 , wherein the split collet further includes two substantially perpendicular slots centered on the opening.

19 . The humeral anchor insertion instrument of claim 17 , wherein the split collet includes an anti-rotation feature configured to engage with a corresponding feature on the humeral anchor to limit rotation between the humeral anchor insertion instrument and the humeral anchor.

20 . The humeral anchor insertion instrument of claim 14 , wherein the second end of the shaft is threadably engaged with a collet such that actuation of the expandable grip to the first configuration causes distal motion of a tapered surface at the second end of the shaft to engage an opening, radially outward expansion of the slots of the collet, and an outermost edge of a distal portion of the collet to be at the interior surface of the humeral anchor.