System and method for joint resurface repair

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/38 (2006.01)

Patent

CA 2516789

An implant for installation into a portion of an articular surface includes an implant shell component having a proximal load bearing wall with an outer proximal load bearing surface. A peripheral rim extending distally relative to the load bearing wall may provide a bone-facing distal pocket on the shell component. An inner implant component may be received in the bone-facing distal pocket of the implant such that a proximal surface of the inner component is spaced apart from a distal surface of the load bearing wall. The contour of the load bearing surface may be based on an original surface contour of an articular surface, and the load bearing wall of the shell component may be a deflectable wall, so that the load bearing surface can deflect under an applied load. The space between the load bearing wall and the inner implant may include a compressible fluid such as elastomeric gels.

La présente invention concerne un implant venant s'installer dans une partie d'une surface articulaire et qui est constitué d'un élément de boîtier implantable doté d'une paroi porteuse de charge proximale avec une surface externe porteuse de charge proximale. Un rebord périphérique ayant une extrémité distale par rapport à la paroi porteuse de charge peut fournir une poche distale faisant face à l'os sur l'élément boîtier. La poche distale faisant face à l'os peut accueillir un élément d'implantation interne de sorte qu'une surface proximale du composant interne est séparée d'une surface distale de la paroi porteuse de charge. La périphérie de la surface porteuse de charge peut être réalisée sur la base du pourtour surfacique d'origine d'une surface articulaire, et la paroi porteuse de charge de l'élément boîtier est réorientable, de sorte que la surface porteuse de charge peut s'orienter sous l'effet d'une charge exercée. On peut introduire un liquide compressible, tel qu'un gel élastomère, dans l'espace se trouvant entre la paroi porteuse de charge et l'élément d'implantation interne.

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