Hinge joint system with distal femoral replacement prosthetic knee

A hinge knee system comprising:

• a femoral component;
• an insert;
• a tibial tray configured to be coupled to the insert;
• a tibial bushing configured to be disposed between the tibial tray and the insert;
• a poly locking screw configured to secure the tibial tray to the insert;
• a hinge box configured to be disposed between the femoral component and the insert;
• a hinge post configured to couple the hinge box to the tibial tray;
• and
• a hinge post set screw configured to secure the hinge box to the hinge post,
• wherein the poly locking screw is pre-assembled into the insert.

A hinge knee system comprising:

• a femoral component;
• an insert;
• a tibial tray configured to be coupled to the insert;
• a tibial bushing configured to be disposed between the tibial tray and the insert;
• a hinge box configured to be disposed between the femoral component and the insert;
• a hinge post configured to couple the hinge box to the tibial tray;
• and
• a hinge post set screw configured to secure the hinge box to the hinge post,
• wherein the tibial bushing comprises one or more cut outs configured to engage with a hinge post tab of the hinge post.

A hinge knee system comprising:

• a femoral component;
• an insert;
• a tibial tray configured to be coupled to the insert;
• a tibial bushing configured to be disposed between the tibial tray and the insert;
• a hinge box configured to be disposed between the femoral component and the insert;
• a hinge post configured to couple the hinge box to the tibial tray;
• and
• a hinge post set screw configured to secure the hinge box to the hinge post,
• wherein the hinge post comprises a hinge post body, a hinge post shaft, a hinge post tab, and a hinge post spring,
• wherein the hinge post shaft comprises a proximal head, a proximal portion below the head, a distal shaft portion below the proximal shaft portion and smaller in diameter than the proximal shaft portion, and a distal feature on a distal end thereof, and
• wherein hinge post shaft further comprises an aperture on a proximal end thereof configured to engage with a hinge post assembly instrument for rotation.