Patent ID: 6030417
Filing Date: 2000-02-29
Classification: A61F

Abstract:
Hip prosthesis including a rod adapted to be inserted and fixed into the medullary canal of a femur, a neck joined to the upper end of the rod to join it to a spherical joint head, the rod having an oblong transverse section proximal area extending from the upper end on either side of an external shoulder to a transition area below the external shoulder and followed by a distal area, the rod being curved in the lateral plane with a centre of curvature offset towards the sagittal plane, the proximal area of the rod having a curved portion, in the anterior-posterior plane, with the centre of curvature offset towards the front, wherein the oblong transverse section proximal area comprises two adjacent segments with opposite spiral twists:a proximal segment having a righthanded spiral twist in a prosthesis for a right femur, and a lefthanded spiral twist in a prosthesis for a left femur,a distal segment having a lefthanded spiral twist in a prosthesis for a right femur, and a righthanded spiral twist in a prosthesis for a left femur.