Knotless suture anchor and method for knotlessly securing tissues

1. A method for knotlessly securing first and second tissues with a suture anchor comprising the steps of:

forming a borehole in the first tissue whereby the suture anchor is received in the borehole of the first tissue;

threading a suture through the second tissue forming a loop in the suture with the tissue thereby secured in the loop, the loop defining two suture portions;

attaching the two suture portions to the anchor whereby at least one of the two suture portions is threaded through the anchor and initially movable with respect to the anchor; and

providing a force to a shaft of the anchor, the force causing clamping of the at least one of the two suture portions in the anchor and deformation of a deformable portion of the anchor to cause the deformable portion to engage a wall of the borehole thereby to secure the suture anchor in the first tissue and the loop holding the second tissue to the suture anchor,

further comprising locking said deformable portion and shaft together to ensure that said at least one of the two suture portions is securely held to said anchor.

2. The method of claim 1 , wherein the step of locking comprises providing at least one proximally disposed stop member directed proximally on a first concentric member surrounding the shaft for engagement with a shoulder on the shaft to prevent movement of the shaft and the concentric member after deformation of the deformable portion.

3. The method of claim 2 , further comprising crimping said stop member radially inwardly securely against the shaft and in abutment with the shoulder.