Method and apparatus for attaching tissue to bone, including the provision and use of a novel knotless suture anchor system
Apparatus for securing an object to bone, the apparatus comprising an anchor comprising a body comprising a passageway; and a movable element comprising a deformable portion; wherein the deformable portion is configured so that, (i) at a first level of force, the deformable portion restricts proximal movement of the movable element, and (ii) at a second, greater level of force, the deformable portion deforms and permits proximal movement of the movable element.
1. Apparatus for securing an object to bone, the apparatus comprising:
an anchor comprising:
a body configured to be permanently retained in a bone, the body comprising a passageway, the passageway having a width; and
a movable element comprising a deformable portion, the deformable portion having a width;
wherein the deformable portion is configured so that, (i) at a first level of force, the deformable portion restricts proximal movement of the movable element, and (ii) at a second, greater level of force, the deformable portion deforms to a width which is less than or equal to the width of the passageway of the body, without deforming the passageway of the body, so as to permit proximal movement of the movable element.
2. The apparatus according to claim 1 wherein the movable element binds a suture to the anchor.
3. The apparatus according to claim 1 wherein the movable element expands the anchor.
4. The apparatus according to claim 1 wherein the deformable portion deforms without separating from the remainder of the movable element.
5. The apparatus according to claim 4 wherein deforming without separating from the remainder of the movable element comprises bending.
6. The apparatus according to claim 5 wherein bending comprises bending in a distal direction relative to the remainder of the movable element.
7. The apparatus according to claim 1 wherein the body obstructs proximal movement of the deformable portion.
8. The apparatus according to claim 7 wherein upon deforming, the movable element passes by an obstructing portion of the body.
9. The apparatus according to claim 1 wherein the movable element is at least partially disposed in the passageway of the body, and further wherein the deformable portion forms an interference fit with the body.
10. The apparatus according to claim 9 wherein, in an initial starting position, the deformable portion is adjacent to the body.
11. The apparatus according to claim 10 wherein the deformable portion is in contact with the body.
12. The apparatus according to claim 1 wherein the deformable portion projects laterally from a surface of the movable element.
13. The apparatus according to claim 1 wherein the deformable portion extends along the full circumference of the movable element.
14. The apparatus according to claim 1 wherein the movable element comprises an elongated body having a distal end and a proximal end, wherein the distal end of the elongated body is larger than the proximal end of the elongated body and the distal end of the elongated body comprises the deformable portion.
15. The apparatus according to claim 1 wherein the passageway of the body comprises a distal section and a proximal section, wherein the distal section of the passageway has a wider width than the proximal section of the passageway.
16. The apparatus according to claim 15 wherein the movable element has a dimension equal to or greater than the proximal section of the passageway of the body, whereby proximal movement of the movable element into the proximal section of the passageway of the body causes the body to expand.
17. The apparatus according to claim 1 further comprising an inserter for deploying the anchor in a hole formed in a bone, the inserter comprising:
a shaft for releasably engaging the body of the anchor; and
an actuation element for moving the movable element within the passageway of the body of the anchor.
18. The apparatus according to claim 17 wherein the deformable portion of the movable element assists holding the anchor on the inserter.
19. The apparatus according to claim 18 wherein engagement of the deformable portion with the body of the anchor assists holding the anchor on the inserter.
20. The apparatus according to claim 17 wherein the actuation element is coupled to the movable element such that the actuation element releases from the movable element after the movable element has moved a selected distance within the passageway of the body of the anchor.
21. The apparatus according to claim 17 wherein the actuation element comprises an elongated body having a proximal end, a distal end and an enlarged head at its distal end.
22. The apparatus according to claim 21 wherein the movable element comprises a bore, and further wherein the elongated body is received in the bore.
23. The apparatus according to claim 1 wherein, when the deformable portion deforms and permits proximal movement of the movable element, the movable element moves within the passageway of the body.
24. The apparatus according to claim 1 wherein, before the deformable portion deforms, the width of the deformable portion is larger than the width of the passageway.