Surgical fastening

1. A method of treating an acromioclavicular (AC) joint injury, comprising:

forming axially aligned passages through a patient's clavicle and coracoid process;

passing a fastener having a concave surface through the passages;

positioning the concave surface of the fastener against a top surface of the patient's clavicle with a long axis of the fastener extending perpendicular to a long axis of the clavicle;

positioning a fastener having a planar profile below the patient's coracoid process; and

adjusting a suture that couples the fasteners to decrease a distance between the fasteners.

2. The method of claim 1 wherein the suture includes a half-hitch knot and adjusting the suture includes pulling on ends of the suture.

3. The method of claim 1 further comprising tying a knot in the suture such that the knot is against an outer surface of the planar fastener.

4. The method of claim 1 wherein passing the fastener having a concave surface through the passages comprises pulling on a second suture attached to the concave fastener.

5. A method comprising:

positioning a bone graft in contact with a patient's glenoid;

forming at least one axially aligned passage through the patient's glenoid and the bone graft;

passing a first portion of a suture through the passage, wherein a second portion of the suture is coupled to a first fastener;

positioning a surface of the first fastener against a surface of the bone graft opposite a surface of the bone graft in contact with the patient's glenoid;

positioning a surface of a second fastener against a surface of the glenoid opposite a surface of the glenoid in contact with the bone graft, wherein the second fastener is coupled to a third portion of the suture; and

adjusting the suture such that the first fastener and the second fastener apply pressure between the bone graft and the patient's glenoid;

wherein the first fastener and the second fastener are not passed through the passage.

6. The method of claim 5 wherein the bone graft is at least a portion of the patient's coracoid process.

7. The method of claim 6 wherein positioning the portion of the patient's coracoid process in contact with the patient's glenoid includes positioning the portion of the patient's coracoid process upright such that a longest dimension of the patient's coracoid process is oriented substantially orthogonal to the surface of the glenoid in contact with the patient's coracoid process.

8. The method of claim 6 wherein positioning the portion of the patient's coracoid process in contact with the patient's glenoid includes positioning the portion of the patient's coracoid process laying down such that a longest dimension of the patient's coracoid process is oriented substantially parallel to the surface of the glenoid in contact with the patient's coracoid process.

9. The method of claim 5 wherein the first fastener and the second fastener each have a planar profile.

10. The method of claim 5 wherein the first fastener has a planar profile and the second fastener has a curvature along a longitudinal axis of the second fastener, a length of the second fastener along the longitudinal axis being greater than a width of the second fastener along a lateral axis of the second fastener.

11. The method of claim 10 wherein the second fastener further has a curvature along a lateral axis of the second fastener.

12. The method of claim 5 wherein:

the second fastener has a circular body with a convex surface and a corresponding, opposite concave surface; and

the second fastener defines two holes for receiving suture and a neck protruding from the concave surface that surrounds the two holes, an outer diameter of the neck being less than or equal to a diameter of the passage through the bone graft.

13. The method of claim 5 , further comprising folding the suture upon itself prior to passing through the passage.

14. The method of claim 13 , wherein the folded suture includes a closed end and wherein coupling a second portion of the suture to the first fastener comprises passing the folded end of the suture through two holes of the first fastener.

15. The method of claim 5 , wherein the bone graft is not laterally constrained by the patient's anatomy.

16. The method of claim 5 , wherein the bone graft is maintained in place by constraint consisting essentially of the pressure created by the first and second fasteners between the bone graft and the patient's glenoid.

17. The method of claim 5 , wherein the bone graft is not positioned into contact with the glenoid within a cavity formed within the glenoid.

18. A method comprising:

positioning a bone graft in contact with a patient's glenoid;

forming two axially aligned passages through the patient's glenoid and the bone graft;

inserting a bone anchor into each of the two passages in the patient's glenoid, wherein each bone anchor includes a length of suture that protrudes from the patient's glenoid when the bone anchor is inserted;

passing a first portion of suture attached to a first of the bone anchors through a first passage in the bone graft after insertion of the first bone anchor into the patient's glenoid;

passing a second portion of suture attached to a second of the bone anchors through a second passage in the bone graft after insertion of the second bone anchor into the patient's glenoid;

positioning a surface of a first fastener against an outer surface of the bone graft opposite a surface of the glenoid in contact with the bone graft, wherein the first fastener is coupled to the first portion of suture and the second portion of suture and wherein the first fastener does not extend beneath the outer surface of the bone graft; and

adjusting the suture such that the first fastener applies pressure between the bone graft and the patient's glenoid.

19. The method of claim 18 wherein the first fastener has a curvature along a longitudinal axis of the first fastener and a curvature along a lateral axis of the first fastener, a length of the first fastener along the longitudinal axis being greater than a width of the first fastener along a lateral axis of the first fastener.

20. The method of claim 18 wherein:

a third portion of suture is attached to the first bone anchor and the first fastener;

a fourth portion of suture is attached to the second bone anchor and the first fastener; and

the first, second, third, and fourth portions of suture are tied together to form a half-hitch knot.