Unicondylar knee replacement

A system of parts for use in unicondylar knee replacement of a patient having a femur and a tibia, comprising:

• a drill guide and an intramedullary rod, the intramedullary rod being sized to fit within the intramedullary canal of the femur of the patient, the drill guide being configured to engage a distal end of the intramedullary rod to that which is configured to engage the patient's intramedullary canal, the drill guide being formed with a foot portion sized to fit between the patient's femur and tibia before any bone is removed from the femur or tibia, the drill guide providing a guide for drilling of at least one hole in the femur laterally offset from the intramedullary rod, and
• a linkage for connecting the drill guide to the intramedullary rod, the linkage comprising at least one rod which couples to an end of the intramedullary rod, and an additional rod which couples to at least two holes in the drill guide;
• wherein at least two holes in the drill guide are positioned such that, for a left knee the linkage engages a first hole and not a second hole, and for a right knee the linkage engages the second hole and not the first hole;
• and further comprising:
• a femoral component for implantation in the femur, the femoral component having a bearing surface having a radius of curvature, and a guide spoon, the guide spoon having a bowl-shaped portion with an internal radius of curvature same as that of the bearing surface, and a handle portion extending from the bowl-shaped portion.

A unicondylar knee replacement system comprising:

• a drill guide comprising:
• a body configured to engage a distal end of a femur;
• a foot portion extending from the body and configured to engage a posterior portion of the femur;
• a first drill hole extending through the body and configured as a guide for drilling a hole into a distal end of a condyle of the femur along a first axis;
• a first rod hole extending into the body and diverging to a first side of the body at a first angle relative to the first axis;
• and
• a second rod hole extending into the body and diverging to a second side of the body at a second angle relative to the first axis;
• and
• a linkage for connecting to the drill guide comprising:
• a linkage body;
• a first rod extending from the linkage body along a second axis;
• and
• a second rod extending from the linkage body parallel to the second axis.