Patent ID: 11911050
Assignee: KNIMBLE DESIGNS, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 9:
10. The system for total knee replacement of claim 1:
wherein the proximal tibial alignment guide is configured to locate on the tibia and the distal femoral alignment guide is configured to locate on the femur with the knee located in extension, a medial ligament of a knee in the leg tensioned to a target extension tension, and a lateral ligament of the knee tensioned to a target extension tension;
wherein the tibial reference surface locates the distal femoral alignment guide with the first set of pin guides distally offset from the second set of pin guides by a first distance;
wherein the proximal tibial cut guide:
locates on the tibia via the first set of pins; and
defines the proximal tibial cut plane offset from the first set of pins by a second distance;

wherein the distal femoral tibial cut guide:
locates on the femur via the second set of pins; and
defines the distal femoral cut plane parallel to the proximal tibial cut plane and offset from the first set of pins by a third distance;

wherein a first sum of the second distance, the third distance, and a target combined distance between an inner proximal tibial face of an artificial tibial component and an inner distal femoral face of an artificial femoral component approximates the first distance to produce the target extension tension on the medial ligament and the lateral ligament with the artificial tibial component and the artificial femoral component installed in the knee and with the knee in extension;
wherein the intermediate femoral alignment guide defines a nominal geometry between the tibial side and the femoral side that approximates a first target geometry between the inner proximal tibial face of the artificial tibial component and the inner distal femoral face of the artificial femoral component when the artificial tibial component and the artificial femoral component are assembled and form the intermediate angle;
wherein the intermediate femoral alignment guide defines the second set of femoral pin guides at a first offset from the tibial side and the femoral side;
wherein the posterior femoral cut guide defines the posterior femoral cut plane at a second offset from the third set of pins when located on the femur; and
wherein a second sum of the first offset and the second offset approximates relative positions of the inner proximal tibial face of the artificial tibial component, the inner distal femoral face of the artificial femoral component, and the inner posterior femoral face of the artificial femoral component when the artificial tibial component and the artificial femoral component are assembled and form the intermediate angle to produce the target partial-flexion tension on the medial ligament and the lateral ligament with the artificial tibial component and the artificial femoral component installed in the knee and with the knee forming the intermediate angle.