A knee prosthesis (100) includes a femoral component (102), a tibial component (104), and a coupling component (106) interconnecting the femoral component (102) and the tibial component (104). The tibial component (104) includes ball (108). The femoral component (102) is configured to move relative to the tibial component (104). The coupling component (106) defines an internal cavity (166) including a first spherical end portion (168) and a second spherical end portion (170). The internal cavity (166) is dimensioned to receive the ball (108) of the tibial component (104). The ball (108) is repositioned between the first spherical end portion (168) and the second spherical end portion (170) of the internal cavity (166) upon movement of the femoral component (102) relative to the tibial component (104).
