Patent ID: 8603101
Filing Date: 2013-12-10
Classification: A61B,A61F

Abstract:
1. A provisional tibial prosthesis system for a prosthetic knee joint for implantation in a natural knee, the provisional tibial prosthesis system capable of alternatively mimicking the geometry of a first final tibial prosthesis and a second final tibial prosthesis, the natural knee comprising a proximal tibia and a distal femur and having a medial/lateral axis, an anterior/posterior axis, and a proximal/distal axis, the medial/lateral axis corresponding to a medial/lateral direction, the anterior/posterior axis corresponding to an anterior/posterior direction, and the proximal/distal axis corresponding to a proximal/distal direction, the provisional tibial prosthesis system comprising: a tibial base plate having a bone contacting surface and an opposing base plate superior surface; a tibial bearing component having a tibial bearing component height, said tibial bearing component attachable to said tibial base plate, said tibial bearing component height representing the first final tibial prosthesis; a shim having a shim height, said shim slidable relative to both said tibial base plate and said tibial bearing component to be slidably receivable between said tibial base plate and said tibial bearing component in the anterior/posterior direction when said tibial base plate and said tibial bearing component are separated by a distance along the proximal/distal axis equal to said shim height, said shim height cooperating with said tibial bearing component height to represent the second final tibial prosthesis; and a base component attachable to said tibial bearing component, said base component positionable between said tibial bearing component and said tibial base plate, said shim slidably receivable between said tibial bearing component and said base component in the anterior/posterior direction when said base component and said tibial bearing component are separated by said distance along the proximal/distal axis equal to said shim height.