US 11,911,050 B2
System for total knee replacement
Derek Amanatullah, Palo Alto, CA (US); and Thomas J Blumenfeld, Palo Alto, CA (US)
Assigned to Knimble Designs, Inc., Dover, DE (US)
Filed by Arthrology Consulting, LLC, Palo Alto, CA (US)
Filed on Oct. 29, 2021, as Appl. No. 17/515,205.
Claims priority of provisional application 63/108,243, filed on Oct. 30, 2020.
Prior Publication US 2022/0133338 A1, May 5, 2022
Int. Cl. A61B 17/17 (2006.01)
CPC A61B 17/1764 (2013.01) [A61B 17/1721 (2013.01); A61B 17/1742 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for total knee replacement comprising:
a proximal tibial alignment guide:
configured to locate on a tibia of a leg in extension;
defining a first set of tibial pin guides configured to guide location of a first set of pins on the tibia; and
defining a tibial reference surface relative to the first set of tibial pin guides;
a distal femoral alignment guide:
configured to locate on a femur of the leg in extension;
constrained relative to the proximal tibial alignment guide by the tibial reference surface; and
defining a first set of femoral pin guides, relative to the first set of tibial pin guides, configured to guide location of a second set of pins on the femur;
a proximal tibial cut guide:
configured to locate on the tibia via the first set of pins; and
defining a proximal tibial cut plane for resecting a proximal structure of the tibia to form a resected proximal tibial face;
a distal femoral cut guide:
configured to locate on the femur via the second set of pins; and
defining a distal femoral cut plane, linearly offset from the proximal tibial cut plane, for resecting a distal structure of the femur to form a resected distal femoral face;
an intermediate femoral alignment guide:
configured to insert between the tibia and the femur in partial flexion;
comprising a tibial side configured to mate with the resected proximal tibial face;
comprising a femoral side angularly offset from the tibial side by an intermediate angle and configured to mate with the resected distal femoral face; and
defining a second set of femoral pin guides, relative to the tibial side and the femoral side, configured to guide location of a third set of pins on the femur; and
a posterior femoral cut guide:
configured to locate on the third set of pins; and
defining a posterior femoral cut plane, angularly offset from the resected distal femoral face, for resecting a posterior structure of the tibia to form a resected distal femoral face.