Cotyloid insert for total hip prosthesis
OwnerAndre Rambert, Jean-Paul Carret +4inventors
InventorsAndre Rambert, Jean-Paul Carret, Jean-Paul Cisterne, Michel-Henri Fessy, Emmanuel Baulot, Frederic Farizon
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Abstract
Acetabular insert comprising a spherical head arranged at one end of a medullary stem and mounted with articulation inside a core, which is itself mounted with articulation inside an acetabular component. The spherical head is made of zirconia and the core comprises an inner cup consisting of an alumina cup on which is immobilized a polyethylene cup overmolded on the alumina cup. In addition, the spherical head is configured so as to be able to be engaged without stress in the cup and be retained directly and exclusively by the latter.
Claims8
An acetabular insert for a total hip prosthesis of the type comprising a spherical head arranged at one end of a medullary stem, which is intended to be fixed to the bone inside the femur, and mounted with articulation inside a core, which is itself mounted with articulation inside an acetabular component consisting, for example, of a metal cup fixed in the acetabular cavity, wherein the spherical head is made of zirconia and the core comprises an inner cup which, intended for the fitting of the spherical head, consists of an alumina cup on which is immobilized a polyethylene cup overmolded on the alumina cup, and wherein the spherical head is configured so as to be able to be engaged without stress in the inner cup and to be able to be retained directly in this cup.
Dependencies are inferred from the claim text.