Patent ID: 9233004
Filing Date: 2016-01-12
CPC Classification: A61B,A61F

Claim Text:
1. An implantable wrist prosthesis for implantation in a wrist, the wrist including a distal end of a radius presenting a substantially concave end surface contour and a carpus, the implantable wrist prosthesis comprising: a radius component comprising an articular receiver and an intramedullary stem extending from the articular receiver, the articular receiver having an inner receiver wall and further having an outer receiver wall adapted to substantially conform to the end surface at the distal end of the radius; a carpal plate having a hole and a bone interface surface and a spheroidal protrusion extending outwardly from a side opposite the bone interface surface; a first carpal screw positioned through the hole in the carpal plate, wherein with the carpal plate secured to the carpus and the screw through the hole in the carpal plate, a portion of a head of the first carpal screw stands proud of the carpal plate; and a carpal piece having a first articulation with the radius component and a second articulation with the carpal plate between a spheroidal cavity on the carpal piece and the spheroidal protrusion, wherein the carpal piece includes an excavation into which a screw head extends, the excavation having a perimeter that impinges on the screw head to limit the second articulation of the carpal piece and the carpal plate.