The embodiments provided for herein relate to apparatus and methods for
securing tissue to bone using a suture anchoring system that provides
enhanced tactile feedback and does not require tying a suture knot. In
each embodiment, a surgeon can individually tension the free ends of the
suture to fine-tune the placement of the tissue with respect to the bone,
and then secure the suture without tying a knot. In several embodiments,
the device may be transformed between locked and unlocked suture states,
thereby allowing further fine-tuning of the tension in the suture. In
other embodiments, the device may permit unidirectional movement of a
suture, while preventing slippage or movement of the suture and tissue in
the opposite direction.