Acetabular spacer device comprising a pharmaceutical substance
OwnerAugusto Magagnoli, Robert Michael Meneghini +3inventors
InventorsAugusto Magagnoli, Robert Michael Meneghini, Bryan Donald Springer, Scott Matthew Sporer, Stephen Joseph Incavo
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Abstract
An acetabular spacer device, of a type that is temporary and disposable, adapted to be implanted in use in a bone cavity placed at a joint of the human body, such as a hip or shoulder joint, has a cup-like shape, substantially hemispherical, and includes a first convex surface, adapted to be positioned at the bone cavity, a second concave surface, which defines a cavity, further includes at least one pharmaceutical or medical substance, such as at least one antibiotic, adapted to treat during use an ongoing infection in the bone cavity.
Claims19
An acetabular spacer device adapted to be implanted in a bone cavity at a joint of a human body, the acetabular spacer device comprising:
- a body made from polymethylmethacrylate and having,
- a substantially hemispherical cup shape,
- an outer first surface that is convex and is configured to be positioned in the bone cavity, and
- an inner second surface that is concave and that defines an inner cavity;
- and
- a pharmaceutical or medical substance adapted to treat an ongoing infection in the bone cavity, the pharmaceutical or medical substance being provided within the body of the acetabular spacer device,
- wherein the inner second surface is configured to be articulated with a head of a stem component that is present at the joint of the human body, or with a head of a stem of a permanent prosthesis or of a spacer device configured to be arranged at the joint of the human body,
- wherein the outer first surface comprises a plurality of elongated recesses or projections that have perimeters that each defines a linear segment or a trapezoidal shape or a substantially rectangular shape and that extend inwardly or outwardly in relation to the outer first surface;
- a base, an apex of the outer first surface being opposite to the base at a top point of the outer first surface;
- and
- an annular tab disposed at the base or at a terminal circular perimeter of the outer first surface, the annular tab extending outwardly for a distance in relation to the outer first surface and/or to the elongated recesses or projections,
- wherein the annular tab provides an abutment or support for a patient's articular seat or acetabular bone, so as to increase stability of positioning or implantation of the acetabular spacer device.
An acetabular spacer device adapted to be implanted in a bone cavity at a joint of a human body, the acetabular spacer device comprising:
- a body made from polymethylmethacrylate, the body having a substantially hemispherical cup shape and defining,
- an outer first surface that is convex and configured to be positioned in the bone cavity,
- an inner second surface that is concave and defines an inner cavity,
- a base, and
- an apex opposite to the base and positioned at a top point of the outer first surface,
- wherein the outer first surface defines a plurality of elongated recesses or projections that extend inwardly or respectively outwardly in relation to the outer first surface,
- wherein the plurality of elongated recesses or projections have a radial arrangement in relation to the apex and depart from the apex or from a surrounding zone of the apex, and
- wherein the inner second surface is configured to be articulated with a head of a stem component that is present at the joint of the human body, or with a head of a stem of a corresponding permanent prosthesis or spacer device of the joint of the human body.
Dependencies are inferred from the claim text.