Femur endoprosthesis for articial hip joint
AssigneeESKA Implants GmbH & Co.
InventorsHans Grundei, Wolfram Thomas
Life of this patent
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Abstract
A femur endoprosthesis for an artificial hip joint is provided with a stem (1) which can be implanted without cement in the upper region of a femur below the greater trochanter. The proximal end (8) of the stem is connectable with an adapter (2) for accommodating an artificial spherical part of a joint (20). The exterior of the stem is at least partially covered with an open-meshed three-dimensional spatial lattice structure (9). A distal end of the stem is bent caudally with a caudally oriented step (31) in the transition area and constructed as a stem end (30), which is also at least partially covered with an open-meshed three-dimensional spatial lattice structure (9).
Claims12
A femur endoprosthesis for an artificial hip joint, comprising a stem (1) implantable without cement in a metaphysial region of a femur (40) below the greater trochanter while partially conserving the femural neck, a proximal end (8) of the stem being connectable with an artificial spherical joint part (20), a distal end of the stem being bent caudally and constructed as a stem end (30), an exterior of the stem (1) and the stem end (30) being at least partially covered with a lattice structure, and the stem having a caudally oriented step (31) in an area of transition into the stem end (30).
A method of implanting a femur endoprosthesis for an artificial hip joint, comprising the steps of:
- providing a stem (1) adapted for implantation without cement in a metaphysial region of a femur (40) and below the greater trochanter in natural spongiosa, the stem having a stem end (30) with a distal portion which is bent caudally, an exterior of the stem (1) and the stem end (30) being at least partially covered with a lattice structure, and a caudally oriented step (31) in an area of transition into the stem end (30);
- implanting the stem with only a proximal end (8) of the stem (1) protruding from the femur;
- positioning the stem (1) so that the caudally bent distal portion of the stem end (30) is generally parallel to a longitudinal axis (47) of the femur and lies laterally on a cortical side of the natural spongiosa;
- and
- connecting the proximal end (8) with an artificial spherical joint part (20).
Dependencies are inferred from the claim text.