Importance

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Abstract

Asymmetric and axisymmetric prostheses for replacement of the radial head are shown which are designed to smoothly interengage with the annular ligament of the radius and effectively allow a patient to recover normal functioning of the forearm. These prostheses have head, collar and stem sections, and the undersurface of the head which surrounds the collar provides a shoulder which is excellently gripped by the annular ligament through which the prosthesis is inserted during implantation, assuring achievement of the desired juxtaposition between the periphery of the prosthesis head and the radial notch of the ulna. In the asymmetric embodiment, shaping the head to provide a proximal surface of generally oval cross-section having an offset concave surface and a medial region of greater thickness offers particular advantages.

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First Claim