Abstract: A knotless suture fixation device (1) and method having a anchor (2) with a top portion (4), a middle portion (5) and a bottom portion (6). The top portion having at least two wings (7) and the bottom portion having an aperture (8) that passes through the anchor. The interior of the middle portion is threaded to accept a screw (3). The screw pushes against the wings to spread the wings outward as the screw is tightened. An opening (29) between the middle portion of the anchor and the bottom portion of the anchor allows the screw to pass through the aperture and make contact with a tip (10) of the anchor as the screw is tightened, thereby locking any sutures that have been inserted through the aperture in place. In an alternative embodiment, the anchor may have one or more press fit ridges (31) instead of wings.

Abstract: A fixation suture device (12) wherein an anchor (1) has a top (6), a core (2) and a tip (5) and external threads (4) located on the anchor core (2). An anchor aperture (3) is located on the anchor (1) for acceptance of sutures (13). To use the device (12), a surgeon passes the sutures (13) through a rotator cuff tendon (14). Then, the sutures (13) are passed through the anchor aperture (3) and the anchor tip (5) is positioned against a humerus (21) via a handle (22) and cannula (23). The surgeon pushes downward on the handle (22) to provide a downward force on the anchor (1) while pulling upward on the sutures (13) in order to produce a desired tension on the rotator cuff tendon (14). The surgeon rotates the anchor (1) into the humerus (21) while maintaining tension on the sutures (13).

Abstract: A knee joint prosthesis used in total knee arthroplasty having tibial components (5) and tibial bearing inserts (20) with predetermined shapes that allow for an additional degree of freedom in both an anterior-posterior direction and rotation. The tibial bearing inserts (20) include a predeterminedly-shaped extension (17), such as a sphere (8), disc (12) or trapezoid (13), that extends downwardly from the bearing (4). The tibial components (5) include a socket (9) having a corresponding predetermined shape of the extension (17) and retaining edges (10) located at a top of the socket (9) so the extension (17) may be “dropped into” the socket (9) and therein retained. In this manner, disengagement of the tibial bearing inserts (20) at extremes of anterior or posterior translation of the bearing relative to the tibial component (5) is prevented without affected the translation and rotation of the tibial component (5) and tibial bearing inserts (20).