Patent ID: 9585759
Date: 2017-03-07
CPC Classifications: A61B,A61F

Claim:
1. A method of preparing a tibia for knee arthroplasty to accommodate the anterior cruciate ligament, the tibia having an articular surface that interacts with a femur, a posterior edge, an anterior edge, a lateral edge, a medial edge, a central compartment, a lateral compartment, a medial compartment, a longitudinal axis located within a dividing plane, the dividing plane extending parallel to a sagittal plane and from the posterior edge to the anterior edge of the tibia, and a spinous process to which the anterior cruciate ligament attaches, the method comprising the steps of: making a sagittal cut in the articular surface of the tibia, the sagittal cut extending from the posterior edge to the anterior edge of the tibia, at least a portion of the sagittal cut extending obliquely to the dividing plane, whereby the obliquely extending portion of the sagittal cut extends away from the central compartment of the tibia; making a transverse cut beneath the articular surface of the tibia, the transverse cut extending from one of the lateral edge of the tibia and the medial edge of the tibia to the sagittal cut and generally transversely to the longitudinal axis of the tibia, thereby forming a cut edge between the transverse cut and the sagittal cut; and resecting one of the medial and lateral compartments of the tibia along the cut edge, while retaining at least a portion of the central compartment of the tibia and at least a portion of the spinous process to which the anterior cruciate ligament attaches.