We Claim:
1. A bidirectional knotless suture anchor for repairing a damaged soft tissue, the anchor comprising of:
an external hollow conical structure, the structure having an external region and an internal region, the external region provided with threads, the internal region having a top portion and a bottom portion; and
a detachably mounted internal support, the support configured to form two distinct parts, a first part comprising of a flange, and a second part configured to form a partially threaded screw, the said screw capable of interlocking with the bottom portion of internal region,
wherein the movement of the internal support enables the bidirectional adjustment of the suture.
2. The anchor as claimed in claim 1, wherein the top portion of the internal region of the hollow conical structure is configured to form a quadrilateral to facilitate the toggle motion of the flange.
3. The anchor as claimed in claim 1, wherein the bottom portion of the internal region is provided with a partially threaded surface towards the tapering end of the internal region.
4. The anchor as claimed in claim 1, wherein the partially threaded screw is capable of interlocking with the partially threaded surface of the bottom portion of the internal region.
5. The anchor as claimed in claim 1, wherein the partially threaded screw of the internal support is capable of being adjustably screwed into the partially threaded internal region to form a passage towards the tapering end of the internal region.
6. The anchor as claimed in claim 1, wherein the formation of the passage enables the introduction of a guidewire.
7. The anchor as claimed in claim 1, wherein the guidewire enables movement of a suture.
8. The anchor as claimed in claim 1, wherein the partially threaded screw of the internal support allows easy movement of the suture within the anchor.
9. The anchor as claimed in claim 1, wherein the toggle motion of the flange allows bidirectional movement of the suture.
10. The anchor as claimed in claim 1, wherein the anchor is additionally provided with a detachably mounted lock to arrest the motion of the flange.
11. The anchor as claimed in claim 1, wherein the arrested motion of the flange allows the suture to be knotless.
12. A method for fixation of a soft tissue using a bidirectional knotless suture anchor, the method comprising of:
identifying at least one desired position on a bone proximal to the soft tissue;
implanting the anchor at each of the said positions on the bone;
inserting a guidewire through an internal passage of the anchor to form a loop;
passing at least one tension member through the soft tissue;
orienting the tension member by passing the tension member through the loop;
adjusting the tension member by determining a load for the identified soft tissue; and
arresting the tension member at the adjusted load to form a knotless suture.