A - Human Necessities
61
F
A61F 2/34 (2006.01) A61F 2/30 (2006.01) A61B 17/86 (2006.01) A61F 2/00 (2006.01) A61F 2/46 (2006.01)
Patent
CA 2166803
The invention relates to a cup-shaped member for a hip joint prosthesis, for implantation into a cavity in the bone tissue in the acetabulum, comprising an acetabular cup (1) made of metal, a ceramic material or any other suitable material, preferably of titanium, the outside of said cup being rotationally symmetrical around a central axis of symmetry. The outer side of the cup (1), that is the side which is to face the bone tissue, is provided with at least one circumferential bead (5) close to the edge of the cup (1), said bead (5) having a barb-like shape in section and consequently allowing the cup (1) to be pushed into said cavity but counteracting the removal of said cup (1) from said cavity, said outer side including said bead(s) (5) being provided with a rough structure serving as a file when said cup (1) is moved or rotated in said cavity.
L'invention concerne un élément cupulaire pour prothèse de l'articulation de la hanche destiné à être implanté dans une cavité du tissu osseux de l'acétabulum. Ledit élément comporte une cupule acétabulaire (1) en métal, en céramique ou en tout autre matériau approprié, de préférence en titane, dont l'extérieur est symétrique en rotation sur un axe central de symétrie. Le côté externe de la cupule (1) destiné à faire face au tissu osseux est doté d'au moins un bourrelet circonférentiel (5) à proximité du bord de la cupule (1) présentant une section en forme de barbe permettant de pousser ladite cupule dans ladite cavité empêchant que cette dernière ne sorte de la cavité, ledit côté interne comportant le(s)dit(s) bourrelet(s) présentant une structure rugueuse servant de lime lorsque ladite coupe (2) se déplace ou tourne dans ladite cavité.
Albrektsson Bjorn
Carlsson Lars
Jacobsson Magnus
Rostlund Tord
Wennberg Stig
Astra Aktiebolag
Fetherstonhaugh & Co.
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