Prosthesis for the trapeze-metacarpal joint of the thumb

A trapezium prosthesis (1) for the trapezio-metacarpal joint of the thumb, said trapezium prosthesis (1) comprising a solid body (2) having an inner core (3), said solid body (2) suitable for being arranged between the scaphoid (31) and the metacarpus (30) of the thumb, said solid body being suitable for operating as a spacer between said scaphoid (31) and metacarpus (30), characterized in that the solid body (2) has the shape of an Archimedean solid having a plurality of facets (17),

• wherein the solid body (2) is provided with surface grooves (16) between the facets (17),
• wherein a net or grid (10) is wrapped around the solid body (2), and wherein portions of said net or grid (10) are inserted into the surface grooves (16) of the solid body (2), and
• wherein the trapezium prosthesis further comprises fixing means (13, 18) suitable for allowing a constraint of the solid body (2) to the scaphoid (31) and the metacarpus (30).