Overview Currently, there is lack of consensus about the universal definition of severe deformity for the arthritic knee. Some consider a deviation of more than 10 degrees for a varus knee as a significant deformity. Others consider a severe deformity…
Overview This chapter reviews the clinical outcome, postoperative alignment, and implant survivorship after kinematically aligned (KA) total knee arthroplasty (TKA) based on results of international randomized controlled trials (RCTs), case-control studies, meta-analyses, and single-surgeon case series. The first section describes…
Overview Tibial forces in the medial and lateral compartments following calipered kinematically aligned (KA) total knee arthroplasty (TKA) are of high interest for two reasons. One reason is that knowledge of the tibial compartment forces provides a quantitative indication of…
Overview The fundamental principle of calipered kinematically aligned total knee arthroplasty (KA TKA) is to reproduce the flexion-extension axis of the prearthritic knee and to maintain the original collateral ligament balance and joint line with controlled, symmetric bony resection. A…
Overview This chapter reviews differences between the morphology of the prosthetic trochlea for four different femoral components set in kinematic alignment (KA) and the native knee in the same femur-cartilage model. Trochlear morphology is described along the arc length of…
Overview This chapter reviews in vitro and in vivo differences in tibiofemoral kinematics between a low-conforming total knee arthroplasty (TKA) implanted with calipered kinematic alignment (KA) and the native knee. Kinematics are defined by laxities and resting positions of the…
Overview Robotic assistance was recently reintroduced in total knee arthroplasty (TKA) to improve surgical precision and to minimize errors. However, the technique stills focuses on mechanical alignment (MA) philosophies, with minor adaptations. This chapter is meant to highlight the surgical…
Introduction Computer-assisted surgery (CAS) or navigation has for the best part of two decades been the gold standard for accuracy and precision in total knee arthroplasty (TKA) in terms of creating neutral coronal and sagittal limb alignment. Accuracy refers to…
Overview This chapter reviews the history of patient-specific instrumentation (PSI) and then outlines the design rationale, surgical techniques, and results seen in kinematically aligned (KA) total knee arthroplasty (TKA). The goals of KA TKA are to (1) restore the native…
Overview This chapter contains discussion and video links that assist the surgeon in performing calipered kinematically aligned (KA) total knee arthroplasty (TKA) with specific manual instruments, a verification worksheet, and a decision tree. The treatment of 4726 primary TKAs performed…