Cartilage is a smooth, highly specialized tissue that coats the
surface of the joint. Although it is only a few millimeters thick, it has
exceptional stiffness to compression and resilience and is able to distribute
loads1. It is
susceptible to injury and is limited in regenerative
biological function of cartilage is to permit articular movement while
minimizing surface friction, to absorb loads in the weight-bearing joints, and
to reduce the stress on the subchondral bone.