Compression and tension instruments and methods of use to reinforce ligaments
The disclosure provides apparatus and methods of use pertaining to syndesmosis reinforcement. Embodiments include a clamp having two jaws that extend toward each other to clamp two bone portions therebetween. The clamp may include an angle gauge and an adjustment mechanism having a force gauge that combine to enable the compression of the two bone portions in an optimal direction or angle and at an optimal, measurable compression force. Embodiments also include a tension instrument configured to knotlessly lock a flexible strand construct between two anchors at the same optimal direction and tension applied by the clamp. Further embodiments include an exemplary syndesmosis reinforcement procedure that employs the clamp and the tension instrument to construct a ligament reinforcement construct that achieves optimal anatomic positioning in both directional alignment and the reduction force applied by the construct. Other embodiments are disclosed.
1. A clamp for compressing first and second bone portions together to reduce a space therebetween, comprising: a body comprising opposing first and second ends, the first and second ends comprising respective first and second jaws that define a longitudinal clamp axis, the first jaw engageable with the first bone portion and the second jaw engageable with the second bone portion to define a directional force vector between the first and the second bone portions that is parallel with the longitudinal clamp axis; and an adjustment mechanism coupled with the second jaw and configured to translate the second jaw distally toward the first jaw along the longitudinal axis to compress the first and the second bone portions between the first and the second jaws, the adjustment mechanism including a force gauge configured to indicate a compression force placed upon the first and the second bone portions by the first and the second jaws along the directional force vector, wherein: the body forms a bow-shaped angle gauge presenting a series of angle indicia; and when a reference line defined by a portion of a patient's anatomy aligns with a zero-degree marking on the angle indicia, the reference line is perpendicular to the longitudinal clamp axis and the directional force vector.
2. The clamp of claim 1 , wherein the clamp further comprises a guide configured for insertion of a drill to form coaxial bone tunnels, parallel with the longitudinal clamp axis, in the first and second bone portions.
3. The clamp of claim 1 , wherein the adjustment mechanism includes a gross adjustment control and a fine adjustment control.
4. The clamp axis of claim 1 , wherein the clamp includes finger grips and a thumb grip configured to enable one-handed operation to apply compression force.
5. The clamp of claim 1 , wherein the clamp includes a release trigger configured to release compression force.
6. The clamp of claim 5 , wherein the release trigger is configured to enable one-handed operation for both application of compression force and release of compression force.
7. The clamp of claim 1 , wherein the longitudinal clamp axis and the directional force vector are parallel with a native ligament extending between the first and the second bone portions.
8. The clamp of claim 1 , wherein the angle indicia on either side of the zero-degree marking indicate an amount of angular deviation between the reference line and the perpendicular.
9. The clamp of claim 1 , wherein the first jaw comprises a v-notch configured to register directly upon the first bone portion.
10. The clamp of claim 1 , wherein the first jaw comprises a spherical end configured to register upon a bone plate coupled with the first bone portion.
11. The clamp axis of claim 10 , wherein the clamp further comprises a guide configured for insertion of a drill to form coaxial bone tunnels, parallel with the longitudinal clamp axis, in the first and second bone portions, wherein the coaxial bone tunnels are coaxial with a hole in the bone plate.
12. The clamp of claim 1 , wherein the longitudinal guide comprises a pin, a drill, or a length of k-wire.
13. A clamp for compressing first and second bone portions together to reduce a space therebetween, comprising: a body comprising opposing first and second ends, the first and second ends comprising respective first and second jaws that define a longitudinal clamp axis, the first jaw engageable with the first bone portion and the second jaw engageable with the second bone portion to define a directional force vector between the first and the second bone portions that is parallel with the longitudinal clamp axis; and an adjustment mechanism coupled with the second jaw and configured to translate the second jaw distally toward the first jaw along the longitudinal axis to compress the first and the second bone portions between the first and the second jaws, the adjustment mechanism including a force gauge configured to indicate a compression force placed upon the first and the second bone portions by the first and the second jaws along the directional force vector, wherein the first end of the body comprises: a C-shaped arm that is coaxial with the longitudinal clamp axis; and a sheath rotatively coupled about the C-shaped arm, the sheath forming a U-shaped groove that is coaxial with the longitudinal clamp axis, wherein: when the sheath is rotated into a closed configuration, a wall of the C-shaped arm aligns with the U-shaped groove such that the U-shaped groove is configured to receive and retain a longitudinal guide; and when the sheath is rotated into an open configuration, an opening of the C-shaped arm aligns with the U-shaped groove such that the clamp is transversely removable from the first and the second bone portions and the longitudinal guide.