US Patent 8998994 Humeral implant having a floating bearing

A shoulder can include a fixed bearing having a generally spherical articulating surface configured to be coupled to a glenoid. The implant can also include a floating bearing member defining a first spherical bearing surface and a second planar articulating bearing surface. The implant can include a stem defining a stem planar bearing surface coupled to the second planar articulating bearing surface. The second planar articulating bearing surface can cooperate with the stem planar bearing surface to enable the floating bearing to translate relative to the stem.