| CPC A61B 17/7091 (2013.01) [A61B 17/7005 (2013.01); A61B 17/7032 (2013.01); A61B 17/7076 (2013.01); A61B 17/7082 (2013.01); A61B 17/7085 (2013.01); A61B 17/8875 (2013.01); A61B 2090/037 (2016.02)] | 10 Claims |
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1. A bone screw kit, comprising:
a support member, including a bottom portion and two wings, the bottom portion having a hole, the two wings being oppositely disposed and parallel to each other and extending in a first direction to protrude over a top surface of the bottom portion, each of the two wings having an internal wall furnished with a first internal thread, a concave portion being formed between the bottom portion and the two wings;
a screw, having a thread portion, pivotally disposed at the bottom portion, the thread portion penetrating through the hole of the bottom portion to swing out of the bottom portion;
an extension sleeve, including a connecting piece and two extension wings, the two extension wings being oppositely disposed at the connecting piece and parallel to each other and extending in the first direction, each of the two extension wings having an external wall furnished with a first external thread, engagement structures being furnished between the internal wall of each of the two extension wings and the corresponding external wall of each of the two wings, the extension sleeve sleeving the two wings of the support member in the first direction, the internal wall of each of the two extension wings being engaged with the corresponding external wall of each of the two wings via the engagement structures;
a connecting rod, disposed between the two wings and axially perpendicular to the first direction;
a screw driver, having axially and oppositely a first axial end and a second axial end, an external wall of the first axial end of the screw driver being furnished with a plurality of ribs, each of the plurality of ribs having a longitudinal direction parallel to the first direction, the first axial end of the screw driver being furnished with a first snap protruding out of the plurality of ribs in the first direction, the first snap having an end with a first outer diameter close to the plurality of ribs and another end with a second outer diameter away from the plurality of ribs, the second outer diameter being less than the first outer diameter;
a locking screw, shaped as a ring, having oppositely a third axial end and a fourth axial end, having a through hole extending in the first direction, an internal wall of the locking screw being furnished with a plurality of grooves parallel to each other and extending in the first direction, an external wall of the locking screw being furnished with a second external thread, a second snap being provided to the third axial end of the through hole close to the locking screw, the second snap having a first inner diameter less than the first outer diameter but larger than the second outer diameter; wherein the first axial end of the screw driver is inserted into the through hole of the locking screw in the first direction, the plurality of ribs are correspondingly engaged with the plurality of grooves, the first snap are engaged with the second snap with a length of the first snap being protruded out of the third axial end, and thus the screw driver is engaged with the locking screw; wherein the screw driver rotates the locking screw to engage the second external thread and the first internal thread so as to clip the connecting rod between the locking screw and the bottom portion; and
an extension sleeve remover, including a socket having two opposite axial ends having an opening and an innermost cavity, respectively, an internal wall of the socket being furnished with a second internal thread, the socket being to sleeve the extension sleeve via the second internal thread engaging the first external thread; wherein the socket is rotated to have the second axial end of the screw driver to contact against the innermost cavity so as to separate the extension sleeve from the support member.
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