Thumb metacarpal implant

Details Thumb metacarpal implant Thumb metacarpal implant

A - Human Necessities

61

F

A61F 2/30 (2006.01) A61F 2/42 (2006.01)

Patent

CA 2737490

A hemi-arthroplasty implant (11) joint replacement for the base of the first metacarpal of the CMC joint is created which can effectively restore and reestablish functional joint mechanics. The implant (11) has a unique head section (13) creating a particular interrelation between a spherical head articular surface (19), that is received in a surgically prepared cavity in the trapezium, wherein a supporting neck (21) in a re-entrant region joins the head to a flat, generally oblong collar (15).

Cette invention concerne le remplacement par hémiarthroplastie de la base du premier métacarpien de l'articulation CMC du pouce par un implant (11) apte à restaurer et à rétablir efficacement la mécanique fonctionnelle de l'articulation. L'implant (11) possède une partie tête unique (13) créant une interrelation particulière entre une surface articulaire de tête sphérique (19), qui est logée dans une cavité préparée chirurgicalement dans le trapèze, un col de support (21) dans une région réentrante reliant la tête à un collier plat, généralement oblong (15).

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