Patent ID: 6136035
Filing Date: 2000-10-24
Classification: A61F

Abstract:
A modular hip joint prosthesis, comprising:a head part, including a connection for a ball of the joint;a shaft part connectable to the head part in a connection region having a curved contour region, in longitudinal section, corresponding to Shenton's arc, the head part including a distal region and the shaft part including a proximal region that together define an insert connection having peripheral edges separated by a gap in the curved contour region; andmeans for locking the insert connection;wherein the head part and the shaft part have respective contours in the connection region, in longitudinal section, which merge with one another without substantially changing direction, regardless of a particular relative alignment of the head and shaft parts, except for the gap in the connection region; andwherein:the head part and/or the shaft part has a conical bore on its underside;the shaft part, on its top side, has a conical peg adapted to the conical bore, for connection to the head part or a further shaft part; anda notch in the head part and/or the shaft part, extending all the way around on the outer wall in the vicinity of the end of the mouth of the conical bore, which notch reduces the mechanical stress occurring due to a bending stress at the edge of the mouth of the conical bore.