grosszehengrundgelenk - prosthesis.

摘要

An endoprosthetic metatarsal-phalangeal replacement joint is described. The joint includes a distal metatarsal component (Figures 5 and 6) having a part-spherical convex distal superior phalangeal articular surface (19), and two inferior "side-by-side" sesamoidal articular surfaces (20, 21), separated by an intersesamoidal ridge (22). The proximal phalangeal component (Figure 7) is provided with a proximal circular surface (28) at least a major portion of which has a part spherical concave surface (29) having similar radius of curvature as the distal superior phalangeal surface (19) of the metatarsal component. Natural, natural-resurfaced or prosthetic sesamoids (8, 9) are secured to a flexible mesh element (32) arranged to be secured between the phalangeal component and the phalanx so that the sesamoids (8,9) are positioned for articulation with the two inferior sesamoidal surfaces (20,21) of the distal metatarsal component.