Once thought to be vestigial and functionless, the menisci are now believed to play a critical role in knee biomechanics. The meniscus cushions the proximal tibia from impact, distributes the load of weight bearing over an area of maximal size, helps stabilize the joint against anterior displacement, helps lubricate the joint, and assists with proprioception (Fig. 1). Figure 1 The medial compartment of the knee showing the articulation of the menisci (M) with the condyles of the femur (F) and tibia (T). As shown, the meniscus increases contact between the bones and therefore distributes stress. (Reproduced with permission from Warren...