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US 2019/0290341 A1Published application
Bone screw and tool for use therewith
OwnerThomas Stuart Loftusinventor
Life of this patent
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Abstract
A bone screw comprises a main body including a shank portion, a head portion attached to the shank portion, and a cap moveably attached to the head portion. The head portion includes a tool interface structure therein having a closed end portion, an open end portion and sidewall extending therebetween. A tool lock recess is provided in at least one of the sidewalls of the tool interface structure. The tool interface structure is accessible through an opening within an exterior surface of the cap.
Claims20
A bone screw, comprising:
- a shank portion having a proximal end and a distal end, wherein the shank portion includes at least one thread on an exterior surface thereof extending from adjacent the proximal end of the shank portion to adjacent the distal end of the shank portion;
- and
- a head portion attached to the shank portion at the proximate end thereof, wherein the head portion includes a tool interface structure therein and wherein the tool interface structure includes a plurality of sidewalls, a floor and a tool lock recess located within at least one of the sidewalls.
A bone screw, comprising:
- a main body including a shank portion and a head portion attached to the shank portion, wherein the head portion includes a tool interface structure therein having a closed end portion, an open end portion and sidewall extending therebetween, wherein a tool lock recess is provided in at least one of the sidewalls of the tool interface structure;
- and
- a cap moveably attached to the head portion, wherein the tool interface structure is accessible through an opening within an exterior surface of the cap.
The bone screw of claim 15 wherein:
- a width of the at least one bone material aperture is equal to about a thread pitch distance of the at least one thread;
- and
- the one or more leading edge faces of the at least one thread is reclined such that a transverse tip-to-tip distance between opposing edge faces of the tread is at least about 25% greater than the thread pitch distance of the at least one thread.
A bone screw, comprising:
- a shank portion having at least one helically shaped thread on an exterior surface thereof, wherein the thread extends from adjacent a proximal end of the shank portion to adjacent a distal end of the shank portion, wherein the shank portion includes a cannulation passage extending longitudinally therethrough, wherein the cannulation passage defines an interior surface of the shank portion, wherein the shank portion includes at least one bone material aperture therein extending between the exterior surface of the shank portion and the interior surface of the shank portion such that an aperture sidewall is defined between the exterior surface of the shank portion and the interior surface of the shank portion;
- a head portion attached to the shank portion at the proximal end thereof, wherein the head portion includes a tool interface structure therein, wherein the tool interface structure includes a closed end portion, an open end portion and sidewalls extending therebetween, wherein the tool interface structure includes a tool lock enabling feature provided in at least one of the sidewalls thereof and wherein the cannulation passage is exposed at the closed end portion of the tool interface structure;
- and
- a cap moveably attached to the head portion, wherein the tool interface structure is accessible through an opening within an exterior surface of the cap.
1 more element
The bone screw of claim 19 wherein:
- the at least one bone material aperture extends through the at least one thread over at least a portion of an entire length of the shank portion;
- a width of the at least one bone material aperture is equal to about a thread pitch distance of the at least one thread;
- and
- one or more leading edge faces of the at least one thread is reclined with respect to the aperture sidewall such that a transverse tip-to-tip distance between opposing edge faces of the tread is at least about 25% greater than the thread pitch distance of the at least one thread.
1 more element
Dependencies are inferred from the claim text.