Soft tissue reconstruction
Methods and instruments for reconstructing soft tissues of a skeletal joint such as for example of the foot or hand are presented.
1. A bone drill guide useable near a metatarsal phalangeal (MTP) joint of a human foot to guide the formation of a hole in a bone that intersects a ligament boney attachment adjacent the joint, the MTP joint including a metatarsal bone having a longitudinal axis and a head with an articular surface, and a phalangeal bone having a head with an articular surface, the bone drill guide comprising:
a body having a reference member comprising a first reference portion, a second reference portion, and a first drill guiding portion, the first and second reference portions positioned on opposing sides of the reference member, the first reference portion engageable with at least one articular surface of the MTP joint and with the second reference portion engageable with at least one other articular surface of the MTP joint, the first drill guiding portion being oriented relative to the first reference portion based on human anatomy relating the location of a first ligament boney attachment to at least one articular surface of the MTP joint, the guide being operable to engage the first reference portion with at least one articular surface of the MTP joint to position the first drill guiding portion in alignment with the boney attachment of the first ligament.
2. The bone drill guide of claim 1 further comprising a second drill guiding portion, the second drill guiding portion being oriented relative to the first and second reference portions to align with a second ligament boney attachment simultaneous with the alignment of the first drill guiding portion with the first ligament boney attachment.
3. The bone drill guide of claim 1 wherein the bone drill guide is operable to engage the first reference portion with an anatomic landmark to position the first drill guiding portion in alignment with the first ligament boney attachment when the landmark is spaced away from the first ligament boney attachment.
4. A bone drill guide useable near a metatarsal phalangeal (MTP) joint of a human foot to guide the formation of a hole in a bone that intersects a ligament boney attachment adjacent the joint, the MTP joint including a metatarsal bone having a longitudinal axis and a head with an articular surface, and a phalangeal bone having a head with an articular surface, the bone drill guide comprising:
a body having a first reference portion engageable with at least one articular surface of the MTP joint and a first drill guiding portion, the first drill guiding portion being oriented relative to the first reference portion based on human anatomy relating the location of a first ligament boney attachment to at least one articular surface of the MTP joint, the guide being operable to engage the first reference portion with at least one articular surface of the MTP joint to position the first drill guiding portion in alignment with the boney attachment of the first ligament, and wherein the first reference portion comprises a member extending away from the body and having a concave surface engageable with the metatarsal head.
5. The bone drill guide of claim 4 wherein the concave surface is spherical and engageable with the metatarsal head, the spherical engagement operable to constrain the guide in three translational degrees of freedom.
6. The bone drill guide of claim 5 wherein the body comprises a guide longitudinal axis and a planar portion, the guide being operable, while the concave surface is engaged with the metatarsal head, to align the guide longitudinal axis parallel to the longitudinal axis of the metatarsal bone to eliminate two degrees of rotational freedom and to align the planar portion parallel to the transverse plane of the foot to eliminate a third degree of rotational freedom.
7. The bone drill guide of claim 4 wherein the concave surface is cylindrical and engageable with the metatarsal head, the cylindrical engagement operable to constrain the guide in two translational degrees of freedom.
8. The bone drill guide of claim 7 wherein the body comprises a guide longitudinal axis and a planar portion, the guide being operable, while the concave surface is engaged with the metatarsal head, to align the guide longitudinal axis with the longitudinal axis of the metatarsal bone to eliminate one degree of translational freedom and two degrees of rotational freedom and to align the planar portion parallel to the transverse plane of the foot to eliminate a third degree of rotational freedom.
9. A bone drill guide useable near a metatarsal phalangeal (MTP) joint of a human foot to guide the formation of a hole in a bone that intersects a ligament boney attachment adjacent the joint, the MTP joint including a metatarsal bone having a longitudinal axis and a head with an articular surface, and a phalangeal bone having a head with an articular surface, the bone drill guide comprising:
a body having a first reference portion engageable with at least one articular surface of the MTP joint and a first drill guiding portion, the first drill guiding portion being oriented relative to the first reference portion based on human anatomy relating the location of a first ligament boney attachment to at least one articular surface of the MTP joint, the guide being operable to engage the first reference portion with at least one articular surface of the MTP joint to position the first drill guiding portion in alignment with the boney attachment of the first ligament, and wherein the body comprises first and second rigid members joined together at a hinge in relative rotating relationship and the first drill guiding portion includes a hole defining a first drill guiding axis through the first rigid member alignable with the boney attachment of a ligament to the metatarsal bone.
10. The bone drill guide of claim 9 wherein the second rigid member includes a second drill guiding portion having a hole defining a second drill guiding axis simultaneously alignable with the boney attachment of a ligament to the phalangeal bone.
11. The bone drill guide of claim 10 wherein the first and second rigid members further include holes for receiving fixation members to attach the rigid members to the metatarsal and phalangeal bones.
12. A method of forming a tunnel in a bone near a bone joint to intersect a ligament boney attachment adjacent the bone joint, the method comprising:
positioning a guide adjacent the bone joint, the guide having a body comprising:
a reference member having a first reference portion and a second reference portion, the first reference portion engageable with at least a first articular surface of the bone joint, the second reference portion engageable with at least a second articular surface of the bone joint; and
a first guiding portion oriented relative to the first reference portion based on human anatomy relating anatomic landmarks associated with the kinematic operation of the bone joint to a ligament boney attachment;
engaging the first reference portion with the first articular surface and engaging the second reference portion with the second articular surface to position the first guiding portion in alignment with the ligament boney attachment; and
guiding a cutter with the first guiding portion to form a bone tunnel intersecting the ligament boney attachment.
13. The method of claim 12 wherein the first guiding portion is oriented relative to the second reference portion based on the human anatomy relating anatomic landmarks, and wherein the engaging includes the second reference portion engaging the second articular surface simultaneously with the first reference portion engaging the first articular surface.
14. The method of claim 12 wherein the first guiding portion comprises a drill guide, and wherein the cutter comprises a drill positioned within and guided along the drill guide.
15. The method of claim 12 wherein the bone joint is a metatarsal phalangeal (MTP) joint of a human foot, and wherein the first articular surface is positioned at a metatarsal head of a metatarsal bone of the human foot.
16. A method of forming a tunnel in a bone near a bone joint to intersect a ligament boney attachment adjacent the bone joint, the method comprising:
positioning a guide adjacent the bone joint, the guide having a body comprising:
a first reference portion engageable with the bone joint; and
a first guiding portion oriented relative to the first reference portion based on human anatomy relating anatomic landmarks associated with the kinematic operation of the bone joint to a ligament boney attachment;
engaging the first reference portion with a first anatomic landmark to position the first guiding portion in alignment with the ligament boney attachment; and
guiding a cutter with the first guiding portion to form a bone tunnel intersecting the ligament boney attachment; and
wherein the bone joint is a metatarsal phalangeal (MTP) joint of a human foot, wherein the first anatomic landmark comprises a metatarsal head of a metatarsal bone of the human foot, and wherein the first reference portion comprises a member extending outwardly from the body and having a concave surface, and wherein the engaging the first reference portion comprises engaging the concave surface with the metatarsal head.
17. The method of claim 16 wherein the concave surface is spherical, and wherein engaging the concave surface with the metatarsal head constrains the guide in three translational degrees of freedom.
18. The method of claim 17 wherein the body further comprises a guide longitudinal axis and a planar portion, the method further comprising:
aligning the guide longitudinal axis parallel with a longitudinal axis of the metatarsal bone to eliminate two degrees of rotational freedom; and
aligning the planar portion parallel with a transverse plane of the human foot to eliminate a third degree of rotational freedom.
19. The method of claim 16 wherein the concave surface is cylindrical, and wherein engaging the concave surface with the metatarsal head constrains the guide in two translational degrees of freedom.
20. The method of claim 19 wherein the body further comprises a guide longitudinal axis and a planar portion, the method further comprising:
aligning the guide longitudinal axis with a longitudinal axis of the metatarsal bone to eliminate one degree of translational freedom and two degrees of rotational freedom; and
aligning the planar portion parallel to a transverse plane of the human foot to eliminate a third degree of rotational freedom.