Patent ID: 6139580
Filing Date: 2000-10-31
Classification: A61F

Abstract:
Joint endoprosthesis, which by a first implant component (1) can be attached to a first epiphysis and by a second implant component (2) to a second epiphysis of two epiphyses that form a joint, wherein the first implant component (1) and the second implant component (2) each have articulation surfaces for the formation of a swivel joint enabling swiveling about a swivel axis (3) directed roughly transversally with respect to the longitudinal extent of the first and second bones that have the first and second epiphyses, and which furthermore has a sliding piece (11, 22) which additionally enables a rotational movement (D) and a translational movement (V) of the epiphyses relative to each other, with the rotational movement (D) being about an axis of rotation (15) roughly transversal to the swivel axis (3) and roughly in the longitudinal direction of the first bone and the translational movement (V) being in a plane that is roughly parallel to the swivel axis (3) and roughly transversal with respect to the axis of rotation (15), characterized inthat the first implant component (1) has a housing (4) that can be embedded in the first epiphysis and anchored in that first epiphysis,that in the housing (4) a first sliding body (11) is mounted so as to be rotatable about the axis of rotation (15),that in the first sliding body (11) a second sliding body (22) is mounted so as to be translatable in a direction roughly transversal to the axis of rotation (15),that the second sliding body (22) projects out of the housing (4),that the second sliding body (22) at its portion that projects out of the housing (4) is fitted with an articulation surface (29) against which the second implant component (2) rests by the articulation surface arranged thereupon andthat the second sliding body (22) by a sliding surface rests against a mating sliding surface provided on the housing (4).