The knee incorporates two crescent-formed cartilage constructions referred to as menisci, which work as shock absorbers and aid smooth motion of the joint. Tears during the meniscus or cartilage can establish from sudden twists, deep squats, or degenerative adjustments eventually.  Injuries for the PCL can result in a reduced selection https://www.theorthopaedicandpainpractice.com/what-happens-if-i-injure-my-posterior-cruciate-ligament/