Magnetically mounted artificial joint
AssigneeUniversitäT Rostock
InventorGeorg Gradl
Life of this patent
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Abstract
The invention relates to a prosthesis for replacing a joint connection, wherein like magnetic fields from the condyle 10, socket 12 and joint collar 14 overlap in such a way that the repulsive forces generate a suspended state of the condyle 10 in the bearing and the damping effect is maximized. The invention is also directed to a method for replacing a bone junction in a mammal, wherein the prosthesis is fastened to the articular bone and repulsive forces generate a levitated state of the condyle 10 under load.
Claims27
A prosthesis for replacing a bone junction, said prosthesis comprising a condyle (10) and a socket (12) of complementary spatial shape and a collar (14), said condyle (10), socket (12) and collar (14) each comprising a permanent magnet layer (18) and a shielding layer (20), the condyle (10) and the socket (12) as well as the condyle (10) and the collar (14) being separated by a gap (24), said permanent magnet layers (18) of condyle (10), socket (12) and collar (14) having like polarity, the flux density of said permanent magnet layers (18) of condyle (10) and socket (12) being at least 0.4 Tesla, and the permanent magnet layer (18) of collar (14) having at most the flux density of the permanent magnet layers (18) of condyle (10) and socket (12).
A method for replacing a bone junction in a mammal by fastening a condyle (10) of a prosthesis to an articular bone of the mammal, a socket (12) of the prosthesis with a shape complementary to that of condyle (10) to another articular bone of the mammal, and a collar (14) of the prosthesis to the socket (12) or a part of the mammal, said condyle (10), socket (12) and collar (14) each having a permanent magnet layer (18) and a shielding layer (20), the permanent magnet layers (18) of condyle (10), socket (12) and collar (14) being provided with like polarity and configured in such a way that repulsive magnetic forces produce a gap (24) between the condyle (10) and the socket (12) and between the condyle (10) and collar (14) when articular bone and prosthesis are under load.
Dependencies are inferred from the claim text.