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AssigneeAdvanced Technical Fabrication
InventorsFranck Bresler, Philippe Catier, Philippe Caudal, Jean-Marie Francois, Jean Godefroy, Henri Horoszowski, Daniel Mole, Paul Rivat
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The prosthesis of the invention comprises a shaft (1) with its upper end (3) linked to a neck (2) connecting it to a spherical joint head. The shaft (1) comprises a proximal area (H1, H2) with a reversed spiral double twist, over a length substantially equal to one third or half of the length (H) of the shaft (1). The proximal segment (H2) of the proximal area and the distal area (H3) are generally rectilinear in the antero-posterior plane, while the distal segment (H1) of the proximal area is curved with the center offset frontwards. The invention provides a prosthesis that fits more effectively in the medullary channel and does not need cement to fix it.
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:
Dependencies are inferred from the claim text.