Patent ID: 11890198
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. An arthroplasty system for a knee joint between a femur and a tibia, the femur comprising a mechanical axis, the system comprising:
a femoral arthroplasty prosthesis configured to be fixed to the femur, the femoral arthroplasty prosthesis comprising a receptacle;
a first adapter configured to be fixed within the receptacle, the first adapter comprising a first constraint feature; and
a first tibial arthroplasty prosthesis configured to be fixed to the tibia such that the first tibial prosthesis articulates with the femoral arthroplasty prosthesis, the first tibial arthroplasty prosthesis comprising a second constraint feature that engages the first constraint feature to constrain motion of the knee to a first range of motion;
wherein:
the first adapter comprises an interior surface that defines a cavity, the interior surface comprising the first constraint feature;
the second constraint feature comprises an exterior surface that, upon insertion into the cavity, provides a cam interaction with the interior surface that limits superior translation, medial-lateral translation, and/or anterior-posterior translation of the first tibial arthroplasty prosthesis relative to the femoral arthroplasty prosthesis; and
the first adapter is configured to be inserted into the receptacle along an anterior direction generally perpendicular to the mechanical axis.