Methods and apparatus for performing knee arthroplasty

Abstract

Methods and apparatus for performing knee arthroplasty, including, but not limited to, bicruciate retaining knee arthroplasty, are described herein. Methods and apparatus for preparing a distal femur for a femoral implant as well as methods and apparatus for preparing a proximal tibia for a tibial implant are described. These methods and apparatus, in at least some embodiments and uses, facilitate decreasing the complexity of knee arthroplasty procedures such as bicruciate retaining procedures, while maintaining, if not improving on, the safety, accuracy and/or effectiveness of such procedures.

1 . A cutting guide assembly for conducting arthroplasty on a knee joint, comprising:
 (a) a navigation instrument configured to be directly or indirectly connected to a proximal tibia, the navigation instrument including a cutting guide connector that can be oriented in at least the following angulations relative to the proximal tibia: neutral varus valgus; predetermined anterior/posterior slope; desired medial/lateral translation; and desired internal external rotation; and   (b) a medial tibial resection cutting guide, comprising:
 (i) a support connector configured to connect the medial tibial resection cutting guide to the cutting guide connector of the navigation instrument; 
 (ii) a medial cutting guide surface configured to guide a cutting or milling instrument to remove a medial portion of the proximal tibia, the medial cutting guide surface oriented on the medial tibial resection cutting guide in substantially the same angulations as the cutting guide connector of the navigation instrument; and 
 (iii) a medial resection opening and a lateral resection opening, the openings oriented in the medial tibial resection cutting guide in substantially the same angulations as the cutting guide connector of the navigation instrument, each opening configured to guide formation of a bore in the proximal tibia.