There are two meniscal cartilages in the knee that act as shock-absorbers – one on the inner and one on the outer side. They are made up of a different type of cartilage to joint surface cartilage and sit between the thigh bone and the shin bone. Their job is to evenly distribute forces across the knee, allowing the bones to glide smoothly without friction. They also provide stability in the joint.
Loss of meniscal tissue means that there is uneven weight distribution and force between the joint surfaces in the knee, which can lead to arthritis.