Joint prosthesis
OwnerFranz Copf, Gunter Rentsch +2inventors
InventorsFranz Copf, Gunter Rentsch, Peter Reill, Srecko Herman
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Abstract
A joint prothesis, which is suitable for small joints and can be implanted without using a cement, comprises two prothesis members (12, 14), each having a joint element (20, 22) made from from PE as well as an anchoring unit (16, 18) cast from titan. The anchoring unit (16, 18) each have a mounting plate (28) and at least one anchoring element (38) carried by the latter, which includes a core portion (40) and anchoring disks (42) carried by the latter. At least an end portion of the anchoring elements (38) is elastically and/or plastically deformable thus enabling the enchoring elements to conform to the contour of a cavity cut into a bone.
Claims41
A joint prosthesis for insertion into a bone cavity of a small joint, comprising:
- an anchoring unit and a joint element carried by the anchoring unit, the anchoring unit comprising a mounting plate and a plurality of spaced elongated anchoring elements extending away from the mounting plate and cooperating to define a generally frustoconical outer contour of the anchoring unit, each anchoring element being formed of a histocompatible alloy and comprising a plurality of radial anchoring disks axially spaced along its length and an end portion, the end portion being elastically deformable to automatically conform the anchoring unit to the geometry of the bone cavity when being inserted into the bone cavity.
A joint prosthesis for insertion into a bone cavity of a small joint, comprising:
- an anchoring unit and a joint element carried by the anchoring unit, the anchoring unit comprising a mounting plate and a plurality of spaced elongated anchoring elements extending away from the mounting plate and cooperating to define a generally frustoconical outer contour of the anchoring unit, each anchoring element being formed of titanium and comprising a plurality of radial anchoring disks axially spaced along its length and an end portion, the end portion being elastically deformable to automatically conform the anchoring unit to the geometry of the bone cavity when being inserted into the bone cavity.
A joint prosthesis for insertion into a bone cavity of a small joint, comprising;
- two prosthesis members, each prosthesis member having an anchoring unit and a joint member carried by the anchoring unit, each anchoring unit comprising a mounting plate and a plurality of spaced elongated anchoring elements extending away from the mounting plate and cooperating to define a generally frustoconical outer contour of the anchoring unit, and each anchoring element being formed of a histocompatible alloy and comprising a plurality of radial anchoring disks axially spaced along its length and an end portion, the end portion being elastically deformable to automatically conform the anchoring unit to the geometry of the bone cavity when being inserted into the bone cavity.
A joint prosthesis for insertion into a bone cavity of a small joint, comprising;
- two prosthesis members, each prosthesis member having an anchoring unit and a joint member carried by the anchoring unit, each anchoring unit comprising a mounting plate and a plurality of spaced elongated anchoring elements extending away from the mounting plate and cooperating to define a generally frustoconical outer contour of the anchoring unit, and each anchoring element being formed of titanium and comprising a plurality of radial anchoring disks axially spaced along its length and an end portion, the end portion being elastically deformable to automatically conform the anchoring unit to the geometry of the bone cavity when being inserted into the bone cavity.
A joint prosthesis, comprising a first joint member comprising a cylindrical joint socket and a second joint member comprising a cylindrical joint ball adapted to be coupled to the cylindrical joint socket by a connection comprising a pin and an elongated opening to form an essentially uniaxially cylinder joint, the connection allowing movement in a direction perpendicular to the main plane of movement of the cylinder joint, each joint member being carried by an anchoring unit, each anchoring unit comprising a mounting plate and a plurality of spaced elongated anchoring elements extending away from the mounting plate and cooperating to define a generally frustoconical outer contour of the anchoring unit, and each anchoring element being formed of a histocompatible alloy and comprising a plurality of radial anchoring disks axially spaced along its length and an end portion, the end portion being elastically deformable to automatically conform the anchoring unit to the geometry of the bone cavity when being inserted into the bone cavity.
Dependencies are inferred from the claim text.