COTYLOID ELEMENT OF A HIP PROSTHESIS, AND TOTAL HIP PROSTHESIS COMPRISING SAME

The invention relates to a cotyloid component of a hip prosthesis, said cotyloid component being hollow and in the form of a cup whose outer part has a thread allowing it to be fixed in the iliac bone, said thread being a discontinuous self-cutting double thread (20, 21), and said cotyloid component...

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Main Authors THEILLEZ, BORIS, CHANZY, NICOLAS, ADAM, PHILIPPE, PROVOST, GILLES, CAMILLERI, JEAN-PHILIPPE, FARISON, FREDERIC, LIMOZIN, RODOLPHE, PHILIPPOT, REMI, FAVRE, ERIC, DOYCINOVICH, SERGE
Format Patent
LanguageEnglish
French
Published 29.10.2009
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Summary:The invention relates to a cotyloid component of a hip prosthesis, said cotyloid component being hollow and in the form of a cup whose outer part has a thread allowing it to be fixed in the iliac bone, said thread being a discontinuous self-cutting double thread (20, 21), and said cotyloid component having a flattened upper pole (1), a coating that promotes osseointegration on its outer face (10), and a concave, substantially hemispherical and polished inner surface (11), characterized in that: (a) the pitch of the threads (20, 21) decreases from the upper pole (1) towards the equatorial periphery (3) of the cotyloid component, (b) the thicknesses of the threads (20, 21) increase from the upper pole (1) of the cotyloid component towards its periphery (3), (c) the crest of the threads (20, 21) is sharp towards the pole (1) of the cotyloid component and rounded or substantially trapezoidal towards the equatorial periphery (3) of the cotyloid component. L' invention concerne un composant cotyloïdien de prothèse de hanche, creux et en forme de cupule, dont la partie externe comporte un filetage pour permettre sa fixation dans l' os iliaque, ledit filetage comportant un double filet (20, 21) auto- taraudant interrompu, ledit composant cotyloïdien comportant un pôle supérieur effacé (1), un revêtement favorisant l' ostéo- intégration sur sa face externe (10), une surface interne concave sensiblement hémi-sphérique polie (11), et caractérisé en ce que : (a) le pas des filetages (20, 21) est décroissant du pôle supérieur (1) vers la périphérie équatoriale (3) du composant cotyloïdien, (b) les épaisseurs des filets (20, 21) sont croissantes du pôle supérieur (1) du composant cotyloïdien vers sa périphérie (3), (c) l' arête des filets (20, 21) est coupante du côté du pôle (1) du composant cotyloïdien et arrondie ou sensiblement trapézoïdale du côté de la périphérie équatoriale (3) du composant cotyloïdien.
Bibliography:Application Number: WO2009FR00341