| 摘要 |
An artificial joint ( 3 ), particularly for replacing a talocrural joint, including a first primary joint surface ( 1 ) that forms an articular fossa ( 4 ) particularly for replacing the tibia composed of concave curvatures extending parallel to a primary function plane of the joint ( 3 ), which corresponds to the sagittal plane, and a second primary joint surface ( 2 ) which cooperates with the first primary joint surface ( 1 ) as a component of a condoyle ( 5 ) that replaces the talus and has convex curvatures ( 7,8,9,10 ) on the primary function plane that are adapted to the first primary joint surface ( 1 ). To achieve high stress resistance and optimal joint mobility, depending on the position of the joint, the radii of the curvatures ( 7,8,9,10 ) are calculated such that the differential amounts arising between the corresponding radii of the first and second primary joint surfaces ( 1,2 ) in an ascending angular position (V) relative to a descending angular position and also simultaneously between a medial face ( 11 ) and a lateral face ( 12 ) of the joint ( 3 ) deviate from one another.
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