A femoral prosthesis system comprising: (a) a femoral prosthesis (100) that includes: a femoral tip (104) with a proximal end (116) defining an axis of the proximal tip (128), a neck (108) located by the proximal part of the proximal end and an insertion / extraction cavity (184) that extends distally from a proximal surface of the neck, the cavity defining an axis of the insertion / extraction cavity (200) which, when it is projected in a coronal plane including the axis of the proximal tip, it is not parallel to the axis of the proximal tip, and an insertion / removal instrument (300) having a distal end (348) configured to engage with the insertion cavity / extraction, the insertion / removal instrument that has an impact surface (356) by which an impact force can be applied to the instrument, the impact force that is transferred through the conduit to the distal end of the instrument, character In that the proximal surface (180) of the neck (108) in which the insertion / extraction cavity (184) is provided extends parallel to a transverse plane perpendicular to the axis of the proximal tip (128), and the instrument Insertion / removal includes a conduit (316) defining an axis (340) that extends through the center of the conduit and to its opposite ends (344, 348) and is configured such that the axis of the conduit is parallel and aligned with the axis of the insertion / removal cavity when the insertion / removal instrument is coupled with the femoral prosthesis.Un sistema de prótesis femoral que comprende: (a) una prótesis femoral (100) que incluye: una punta femoral (104) con un extremo proximal (116) que define un eje de la punta proximal (128), un cuello (108) ubicado por la parte proximal del extremo proximal y una cavidad de inserción/extracción (184) que se extiende de forma distal desde una superficie proximal del cuello, la cavidad que define un eje de la cavidad de inserción/extracción (200) que, cuando se proyecta en un plano coronal incluyendo el eje
