Abstract: A flat shaft of a hip-joint prosthesis for anchoring in a femur. The shaft expands on all sides towards a proximal end from a distal end of the shaft and medially merges with a curved section that is continuous with a prosthesis neck. The shaft is additionally expanded in a proximal region along a proximal direction on at least one of an anterior and posterior surfaces.

Abstract: A profiled shaft for anchoring a hip-joint prosthesis in the femur is disclosed, with a shaft section and a fixation section that is formed at the end of the shaft section and that serves for the fixation of a spherical joint head, wherein the shaft section on the lateral surface in the proximal region merges with a trochanter wing at the edges of which beveled surfaces are formed. The essential point of the invention is that the angle formed between the plane of a beveled surface the plane of the adjacent surface is smaller than 135° and larger than 90°. In a construction of this kind the advantage of an improved filling of the empty space in the trochanter-wing region is achieved.

Abstract: Leaflike shaft (1) of a hip-joint prosthesis for anchoring in the femur, according to a towards a distal end (5) [sic], with a femur-anchoring section (1a, . . . 1i) having a long axis (A) and with a prosthesis neck (2), wherein the femur-anchoring section 1a, . . . 1i) has a substantially rectangular external contour in a plane perpendicular to the long axis (A), optionally with recesses in the side edges and/or at the corners.

Abstract: A profiled shaft for anchoring a hip-joint prosthesis in the femur is disclosed, with a shaft section and a fixation section that is formed at the end of the shaft section and that serves for the fixation of a spherical joint head, wherein the shaft section on the lateral surface in the proximal region merges with a trochanter wing at the edges of which beveled surfaces are formed. The essential point of the invention is that the angle formed between the plane of a beveled surface and the plane of the adjacent lateral surface is smaller than 135° and larger than 90°. In a construction of this kind the advantage of an improved filling of the empty space in the trochanter-wing region is achieved.

Abstract: Leaflike shaft (1) of a hip-joint prosthesis for anchoring in the femur, according to a towards a distal end (5) [sic], with a femur-anchoring section (1a, . . . 1i) having a long axis (A) and with a prosthesis neck (2), wherein the femur-anchoring section 1a, . . . 1i) has a substantially rectangular external contour in a plane perpendicular to the long axis (A), optionally with recesses in the side edges and/or at the corners.

Abstract: Hip-joint endoprosthesis system with a plurality of, in particular leaflike, prosthesis shafts (1.1′, 1.2′) for anchoring in the femur, wherein each shaft expands substantially on all sides from a distal end (5) towards proximal and comprises an anchoring section with a shaft long axis (AS) that merges medially with an arch (7.1′, 7.2′) that continues into a prosthesis neck (9.1′, 9.2′) with a prosthesis-neck axis (AH), such that the shafts differ with respect to a reference-point distance (A1′, A2′, A3′) between the shaft long axis and a reference point (R1′, R2′, R3′) on the prosthesis neck axis, which identifies the position of the center point of a joint ball set onto the prosthesis neck, and such that that the length (l) of the projection of the overall extent of the prosthesis shaft from the distal end of the anchoring section to the reference point or to the proximal end of the prosthesis neck is the same in all prosthesis shafts.