Acetabular implant and method for deforming this implant
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%.
Claims19
An acetabular implant to be placed in a hip socket having a bone surface, the acetabular implant having a bone side with a contact surface to be fixed against the bone surface 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 strut elements of said zone are made of a material having an elongation at break of at least 15%, wherein said zone has a yield strength comprised between a minimum value and a maximum value, wherein said minimum value corresponds to a maximum load of said zone in vivo, after attaching the implant to the bone surface of the hip socket, and wherein said maximum value corresponds to a medically justifiable maximum load exerted on said bone surface when placing the implant against the bone of the hip socket, wherein said minimum value of the yield strength of said zone amounts to 0.1 MPa.
An acetabular implant to be placed in a hip socket having a bone surface, the acetabular implant having a bone side with a contact surface to be fixed against the bone surface 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 strut elements of said zone are made of a material having an elongation at break of at least 15%, wherein said strut elements have a length between 3 mm and 10 mm.
An acetabular implant to be placed in a hip socket having a bone surface, the acetabular implant having a bone side with a contact surface to be fixed against the bone surface 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 strut elements of said zone are made of a material having an elongation at break of at least 15%, wherein said zone has a yield strength comprised between a minimum value and a maximum value, wherein said minimum value corresponds to a maximum load of said zone in vivo, after attaching the implant to the bone surface of the hip socket, and wherein said maximum value corresponds to a medically justifiable maximum load exerted on said bone surface when placing the implant against the bone, and wherein said maximum value of the yield strength of said zone amounts to 1 MPa.
Dependencies are inferred from the claim text.