Acetabulair implantaat en werkwijze voor het vervormen van dit implantaat
AssigneesCommon Sense Engineering and Consult, UMC Utrecht Holding B.V.
InventorsHermannus Hendricus WEINANS, Peter MERCELIS
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Abstract
Acetabular implant and method for its manufacture, wherein the implant has a bone side with a contact surface to be fixed against the bone of the hip socket. A plastically deformable zone with an open porous structure connects to the contact surface, the zone being formed by a three-dimensional structure composed of strut elements with opposite ends, wherein these strut elements are connected at their ends in nodes. The zone is made of a material having an elongation at break of at least 15%.
Claims25
An acetabular implant to be placed in a hip socket, having a bone side with a contact surface to be fixed against the bone of the hip socket, wherein a plastically deformable zone with an open porous structure connects to said contact surface, said zone being formed by a three-dimensional structure composed of strut elements with opposite ends, wherein these strut elements are connected at their ends in nodes, such that at least three strut elements are connected in each node, wherein said zone is made of a material having an elongation at break of at least 15%, and preferably at least 20%.
A method for manufacturing a patient-specific acetabular implant to be placed in a patient's hip socket, wherein
- a press mold is manufactured whose geometry corresponds to the geometry of the hip socket,
- an acetabular implant is selected which is oversized for the patient's hip socket, wherein this oversized acetabular implant has a bone side with a contact surface which is to be fixed to the bone of the hip socket and a plastically deformable zone with an open porous structure which adjoins said contact surface,
- said oversized acetabular implant is pressed in the press mold with said bone side, thus deforming said plastically deformable zone.
A method for placing an acetabular implant in a patient's hip socket, wherein an acetabular implant is provided which is oversized for said hip socket, wherein this oversized acetabular implant has a bone side with a contact surface which is to be fixed to the bone of the hip socket as well as a plastically deformable zone with an open porous structure adjoining said contact surface,
- wherein said implant is pressed, according to a selected insertion direction, with said contact surface against the inner surface of the hip socket, so that said plastically deformable zone is at least partially deformed and adapted to the shape of the bone of the hip socket.
Dependencies are inferred from the claim text.