tibial component with mobile bearing knee.

摘要

An orthopedic component (10) of the knee to be implanted in a proximal tibia (12), comprising a tibial tray (18) with a proximal tibial plateau (22) and a distal stem (24), and a bearing (20) carried by said tibial tray (18) having an articular surface (34) of the bearing for engagement with a femoral component (14), which component is characterized in that: the tibial tray has a recess (32) penetrating the tibial plateau and is it configured to define a first rotational stop (33) and a second rotational stop (35), further having said tibial tray (48) a post (28) generally cylindrical within said cavity (32), the post (28) extends generally perpendicular to said tibial plateau (22) and defines an axis of rotation, and that said bearing (20) has an opening (38) in which said post (28) is arranged, allowing said opening (38) and said post ( 28) the pivotal movement of said bearing (20) on d icho axis of rotation (30) relative to said tibial plateau (22) further having said bearing (20) a projection (44) projecting into said cavity (32) of said tibial tray (18), which projection (44) is configured to abut said first rotational stop (33) when said bearing (20) is in a first rotational limit and to abut said second rotational stop (35) when said bearing (20) is in a second limit rotational.