A tubular anchor may have a polygonal cross-sectional configuration with flat outer side surfaces areas connected by a plurality of outer corner portions. A passage through the anchor may be formed by flat inner side surfaces interconnected by inner corner portions. A suture is inserted through the passage. A concentrated force may be applied against a limited area on a trailing end of the anchor to rotate the anchor to move an outer corner portion of the anchor into engagement with body tissue. The suture may engage an inner corner portion of the anchor. The suture may be inserted through a plurality of anchors and the anchors moved through a tubular member into the body tissue under the influence of force transmitted from a trailing anchor to a leading anchor. When the leading anchor is moved into the body tissue, it is rotated under the influence of force applied against a trailing end of the leading anchor. If desired, two anchors may be interconnected. A groove may advantageously be provided along the leading end and side of an anchor to receive the suture.
This application is a continuation of U.S. patent application Ser. No. 08/929,168, filed Sep. 12, 1997, now U.S. Pat. No. 5,941,900. The aforementioned application Ser. No. 08/929,168 is itself a continuation of U.S. patent application Ser. No. 08/667,549 filed Jun. 21, 1996, now U.S. Pat. No. 5,733,306. The aforementioned application Ser. No. 08/667,549 is itself a divisional of U.S. patent application Ser. No. 08/452,310 filed May 26, 1995 and issued as U.S. Pat. No. 5,584,862 on Dec. 17, 1996. The aforementioned application Ser. No. 08/453,310 is itself a divisional of U.S. patent application Ser. No. 08/291,970 filed Aug. 17, 1994 and issued as U.S. Pat. No. 5,549,630. The aforementioned application Ser. No. 08/291,970 is itself a continuation-in-part of U.S. patent application Ser. No. 08/062,295 filed May 14, 1993 and issued as U.S. Pat. No. 5,403,348. The benefit, under Title 35 United States Code, .sctn.120, of the aforementioned applications is hereby claimed.
To secure a first body tissue with a second body tissue, a first anchor is moved along a first path through the first body tissue into the second body tissue. A second anchor is moved along a second path through the first body tissue into the second body tissue. A suture extending between the anchors may be tightened by moving the second anchor along a path which extends transverse to the path of the first anchor. The suture which extends between the anchors may have free ends which are connected with a suture retainer. The free ends of the suture may be interconnected either before or after the anchors are moved along the first and second paths. Alternatively, the suture may be a continuous loop which extends between the two anchors. A guide assembly may be provided to guide movement of the anchors along the two paths. The paths along which the anchors move may intersect so that the anchors may be interconnected at the intersection between the two paths.
To secure a first body tissue with a second body tissue, a first anchor is moved along a first path through the first body tissue into the second body tissue. A second anchor is moved along a second path through the first body tissue into the second body tissue. A suture extending between the anchors may be tightened by moving the second anchor along a path which extends transverse to the path of the first anchor. The suture which extends between the anchors may have free ends which are connected with a suture retainer. The free ends of the suture may be interconnected either before or after the anchors are moved along the first and second paths. Alternatively, the suture may be a continuous loop which extends between the two anchors. A guide assembly may be provided to guide movement of the anchors along the two paths. The paths along which the anchors move may intersect so that the anchors may be interconnected at the intersection between the two paths.
A suture anchor includes a placement portion frangably connected to an attachment portion. The attachment portion includes an outwardly projecting barb. During insertion of the suture anchor within a bore hole formed on a bone, the barb scores at least a portion of the bone bounding the bore hole. Once the suture anchor is disposed within the bore hole, a withdrawal force is applied to the suture anchor such that the attachment portion thereof rotates within the bore hole and disconnects from the placement portion. In an alternative embodiment, the suture anchor can be formed without the outwardly projecting barb.
