Inserter for glenosphere
A glenosphere handling tool, which can be an impactor, is provided that includes an elongate body and a retention portion. The retention portion is disposed at a distal end of the elongate body. The retention portion includes a plurality of wall segments of the elongate body separated from each other by one or more slots. The slot(s) extends proximally from the distal end of the elongate body. The retention portion also includes an enlarged periphery at the distal end of the elongate body. The enlarged periphery comprising a proximally facing edge configured to engage an inner wall surface of a glenosphere. The retention portion is configured such that when the retention portion is in a free state the proximally facing edge faces and may contact a surface of a glenosphere to retain the glenosphere. The retention portion is configured to be deflected at the distal end of the elongate body such that the enlarged periphery has a reduced profile for separating the handling tool from a glenosphere.
1 . A glenosphere handling tool, comprising:
a handle assembly comprising:
an outer elongate body extending between the proximal end and the distal end;
an inner elongate body disposed within a first lumen defined by the outer elongate body, the inner elongate body defining a second lumen therethrough and a including a deflectable tip portion disposed at a distal end thereof; and
an actuator configured to slide the inner elongate body and deflectable tip portion relative to the outer elongate body along a longitudinal axis defined by the first lumen between a first position and a second position that is located more distal relative to the outer elongate body than the first position;
wherein, when the inner elongate body and the deflectable tip portion are disposed in the first position, the deflectable tip portion is disposed in a deflected position, and
wherein, when the inner elongate body and the deflectable tip portion are disposed in the second position, the deflectable tip portion is disposed distal of the distal end of the outer elongate body and in an undeflected position such that deflectable tip portion is sized and configured to be received within a cavity of a glenosphere and to apply a force to the glenosphere.
2 . The glenoid handling tool of claim 1 , wherein the actuator extends from outside the outer elongate body through a slot in the outer elongate body into engagement with a first portion of the inner elongate body.
3 . The glenosphere handling tool of claim 2 , wherein the first portion of the inner elongate body is enlarged compared to a second portion of the inner elongate body that is disposed distal of the first portion.
4 . The glenosphere handling tool of claim 1 , wherein the inner elongate body comprises an enlarged portion configured to engage a first end of a compression spring, a second end of the compression spring configured to engage an inner surface of the outer elongate body.
5 . The glenosphere handling tool of claim 1 , further comprising a strike plate coupled with the outer elongate body, the strike plate having an aperture aligned with the first lumen and the second lumen to provide access from the strike plate to the distal end of the inner elongate body.
6 . The glenosphere handling tool of claim 1 , wherein the second lumen defined by the inner elongate body is sized to slideably receive a control member in a first position in which a distal end of the control member is disposed proximal of the deflectable tip portion and a second position in which the distal end of the control member is disposed within or distal of the deflectable tip portion.
7 . The glenosphere handling tool of claim 1 , wherein the deflectable tip portion is configured to be maintained in the undeflected position when the lumen is occupied.
8 . The glenosphere handling tool of claim 1 , further comprising a compression spring, the compression spring including a first end and a second end, the first end of the compression spring configured to engage an enlarged portion of the inner elongate body, and the second end of the compression spring configured to engage an inner surface of the outer elongate body.
9 . The glenosphere handling tool of claim 1 , wherein the actuator is received within a slot defined by the outer elongate body that extends in a direction corresponding to a longitudinal axis of the glenosphere handling tool, the slot including a first position, a second position, and a third position.
10 . The glenosphere handling tool of claim 9 , wherein, when the actuator is disposed in the first position of the slot, a distal portion of the inner elongate body is fully extended from an impaction tip that is disposed at the distal end of the outer elongate body.
11 . The glenosphere handling tool of claim 9 , wherein the third position is disposed between the first position and the third position.
12 . The glenosphere handling tool of claim 11 , wherein the third position is circumferentially displaced relative to the first position and the second position.
13 . The glenosphere handling tool of claim 12 , wherein the deflectable tip portion is extended to engage the glenosphere when the actuator is disposed in the third position of the slot.
14 . The glenosphere handling tool of claim 1 , wherein the deflectable tip portion includes an enlarged portion at the distal end of the inner elongate body, the enlarged portion having a greater diameter than a diameter of a portion of the inner elongate body adjacent to the enlarged portion.
15 . The glenosphere handling tool of claim 14 , wherein the portion of the inner elongate body adjacent to the enlarged tip portion is located between the enlarged tip portion and a tapered portion of the inner elongate body.
16 . The glenosphere handling tool of claim 15 , wherein the inner elongate body defines a slot that extends from the distal end of the inner elongate body to the tapered portion of the inner elongate body.
17 . A glenosphere handling tool, comprising:
an outer impactor assembly comprising an outer elongate body, a handle disposed at a proximal portion of the glenosphere handling tool, and an impaction tip at a distal portion of the glenosphere handling tool;
an inner impactor assembly comprising an inner elongate body, a deflectable distal portion, the inner elongate body slideably disposed within the outer elongate body;
a lumen disposed through the inner elongate body and the deflectable distal portion disposed at a distal end thereof; and
an actuator configured to slide the inner elongate body axially relative to the outer elongate body to move the deflectable distal portion from a first position in which the deflectable distal portion is disposed proximal of the impaction tip to a second position in which the deflectable distal portion is disposed distally of the impaction tip,
wherein the deflectable distal portion is configured to be deflected within a cavity of a glenosphere and to apply a force to the glenosphere toward the handle of the outer impactor assembly,
wherein the actuator is disposed within a slot defined by the outer elongate body, the slot defining a plurality of discrete positions along its length.
18 . The glenosphere handling tool of claim 17 , wherein the inner impactor assembly comprises an enlarged proximal portion and a spring member disposed between the enlarged proximal portion and an inner surface of the outer impactor assembly, the spring member configured to apply a traction force to a glenosphere toward the handle when a glenosphere is coupled with the deflectable distal portion.
19 . The glenosphere handling tool of claim 17 , further comprising a compression member disposed within the outer elongate body and in engagement with the inner elongate body, the compression member configured to store strain energy.
20 . The glenosphere handling tool of claim 19 , wherein the compression member is disposed between a proximal facing surface of the outer elongate body and a distal facing surface of the inner elongate body.
21 . The glenosphere handling tool of claim 17 , wherein the deflectable distal portion includes an enlarged portion disposed at a distal end of the inner elongate body.
22 . The glenosphere handling tool of claim 21 , wherein the inner elongate body defines a slot that extends proximally from the distal end of the inner elongate body.
23 . The glenosphere handling tool of claim 17 , wherein at least one position of the plurality of discrete positions along the length of the slot is circumferentially displaced relative to at least one other position of the plurality of discrete positions.
24 . A glenosphere handling tool, comprising:
an elongate body comprising a proximal end and a distal end;
a retention portion disposed at the distal end of the elongate body, the retention portion comprising:
a plurality of wall segments of the elongate body separated from each other by a slot, the slot extending from a proximal end of the slot to a distal end of the slot at the distal end of the elongate body; and
an enlarged periphery at the distal end of the elongate body, the enlarged periphery comprising a proximally facing edge configured to engage an inner wall surface of a glenosphere;
wherein the retention portion is configured such that the when the retention portion is in a free state the proximally facing edge faces and may contact a surface of a glenosphere to retain the glenosphere,
wherein the retention portion is configured to be deflected at the distal end of the elongate body such that the enlarged periphery has a reduced profile for separating the handling tool from a glenosphere,
wherein the elongate body comprises an inner elongate body and further comprising an outer elongate body, the inner elongate body being slideably disposed int eh outer elongate body, and
wherein the retention portion of the inner elongate body is extended from the other elongate body of the inner elongate body and is resiliently biased toward the proximal end of the outer elongate body.
25 . The glenosphere handling tool of claim 24 , further comprising a control member configurable to cause the retention portion to retain a glenosphere.
26 . The glenosphere handling tool of claim 25 , wherein the control member has a configuration in which the control member is separated from the retention portion.
27 . The glenosphere handling tool of claim 24 , further comprising a wire and wherein the elongate body comprises a lumen extending between the proximal end and the distal, the retention portion being configured for retaining a glenosphere when the wire is disposed within the retention portion.
28 . The glenosphere handling tool of claim 24 , wherein when the inner elongate body is resiliently biased to apply a retention force on a glenosphere which retention force is transferred through the glenosphere to an impaction tip, the impaction tip applying a reaction force opposing the retention force.
29 . The glenosphere handling tool of claim 24 , wherein the outer elongate body comprises a slot and further comprising an actuator disposed through the slot and engaged with the inner elongate body, the actuator moveable along the slot to a first position in which the retention portion is exposed at a distal end, a second position in which the retention portion is retracted and a third position disposed between the first position and the second position.
30 . The glenosphere handling tool of claim 29 , wherein the slot comprises a first portion aligned with a longitudinal axis of the glenosphere handling tool and a second portion transverse to the first portion, the first position and the second position corresponding to positions along the first portion of the slot and the third position corresponding to a position along the second portion of the slot.
31 . The glenosphere handling tool of claim 24 , further comprising a strike plate disposed at the proximal end of the outer elongate body and an impaction tip disposed at the distal end of the outer elongate body.
32 . The glenosphere handling tool of claim 31 , wherein application of an impaction load causes proximal motion of the inner elongate body relative to the outer elongate body.
33 . The glenosphere handling tool of claim 24 , wherein the outer elongate body comprises a handle at a proximal end, an impaction tip opposite the handle, and a low profile portion disposed between the handle and the impaction tip, the low profile portion being smaller in width than both the handle portion and the impaction tip and comprising a continuously concave curve in side view.
34 . The glenosphere handling tool of claim 31 , wherein the impaction tip is removeably mounted to a recess in the outer elongate body.
35 . The glenosphere handling tool of claim 31 , wherein the impaction tip comprises an aperture configured to slideably receive the enlarged periphery of the distal end of the inner elongate body.
36 . The glenosphere handling tool of claim 24 , further comprising an outer member disposed over an outer surface of the elongate body, the outer member configured to be disposed on a side of a glenosphere opposite the enlarged periphery of the retention portion when the enlarged periphery has a profile configured for retaining the glenosphere.
37 . The glenosphere handling tool of claim 36 , wherein the outer member is configured to be moved toward the distal end of the elongate body to apply a load to a glenosphere engaged with the retention portion and to deflect the distal end of the retention portion such that the enlarged periphery has a profile to allow the retention portion to separate from the glenosphere.