Alignment jig for a bone fixation device
A jig for a bone fixation device, including those that comprise a guide; and a connecting element reversibly engagable with the bone fixation device; wherein the guide defines a non-rectilinear path and is adapted to receive the connecting element; and wherein the connecting element is remotely operable, and is adapted to permit a tool to be engaged with the bone fixation device. Other embodiments of the present invention include methods for placing a bone fixation device in a bone, using a jig of the present invention comprising the step of reversibly engaging the bone fixation device with the jig.
1. A jig for a bone fixation device, the jig comprising a guide; and a connecting element reversibly engagable with the bone fixation device; wherein the guide defines a non-rectilinear path and has a hollow cylindrical body and first and second open ends to allow the passage of the connecting element therethrough; and wherein the first end of the guide is in non-parallel orientation with respect to the second end of the guide; and wherein the connecting element is remotely operable, and is adapted to permit a tool to be engaged with the bone fixation device; and wherein the connecting element comprises an actuator arranged for rotational motion relative to the guide; and wherein the actuator comprises a hollow cylindrical body, which is, in use, co-axial with, and extends between the first and second ends of, the guide and wherein the actuator comprises at least two segments, which are each arranged for reciprocal movement relative to the other segment with respect to the longitudinal axis of the actuator, and wherein each segment is crenulated and comprises crenels arranged to receive crenels of an adjacent segment.
2. A jig according to claim 1 , wherein the connecting element is adapted for threaded engagement with the bone fixation device.
3. A jig according to claim 1 , wherein the connecting element comprises an aperture to allow the passage of a tool therethrough.
4. A jig according to claim 1 , wherein the actuator is arranged to permit rotation of the connecting means at the first end of the guide by rotation of the actuator at the second end of the guide.
5. A jig according to claim 1 , wherein at least part of each segment of the actuator is arranged for reversible displacement relative to an adjacent segment of the actuator with respect to the longitudinal axis of the actuator.
6. A jig according to claim 1 , wherein each segment is arranged for limited reversible displacement relative to an adjacent segment of the actuator with respect to the longitudinal axis of the actuator.
7. A jig according to claim 1 , wherein the crenels of each segment are arranged for limited reversible displacement relative to the crenels of an adjacent segment of the actuator with respect to the longitudinal axis of the actuator.
8. A jig according to claim 7 , wherein the tip of each crenel has a greater dimension relative to the root of each crenel.
9. A jig according to claim 1 , wherein, in use, the guide, the actuator, and the tool are co-axial and capable of independent rotational movement relative to one another.
10. A jig according to claim 1 , wherein the bone fixation device further comprises a device to fix a fracture in the bone, and wherein the bone fixation device is adapted to be reversibly engagable with the fracture-fixing device.
11. A method for placing a bone fixation device in a bone, using a jig according to claim 1 , the method comprising the step of reversibly engaging the bone fixation device with the jig.
12. A method according to claim 11 , wherein the engaging step further comprises rotating the connecting means at the first end of the guide by rotating the actuator at the second end of the guide.
13. A method according to claim 12 , wherein the engaging step comprises passing the actuator through the guide such that the guide and the actuator are co-axial and capable of rotational movement relative to one another.
14. A method according to claim 11 , wherein the method further comprises the step of introducing the bone fixation device into the bone.
15. A method according to claim 11 , wherein the method further comprises the step of fixing a fracture in the bone, the fixing step comprising introducing a fracture-fixing device across the fracture in the bone.
16. A method according to claim 15 , wherein the fixing step further comprises engaging the fracture-fixing device with the bone fixation device.
17. A method according to claim 15 , wherein the fixing step comprises passing the tool through the actuator such that the tool and the actuator are co-axial and capable of rotational movement relative to one another.
18. A method according to claim 15 , wherein the fixing step comprises passing the tool through the actuator such that the tool and the actuator and the guide are co-axial and capable of independent rotational movement relative to one another.