Osteoarthritis of the knee 2

Osteoarthritis occurs when the layer surrounding the bony surfaces of joints is worn and becomes thin. It is often a gradual process but can be hastened by injury. Once the cartilage is thin, there is little likelihood of it regenerating as it has an extremely poor blood supply, so healing proteins and other compounds cannot reach the cartilage. Sometimes the answer to reducing pain and preserving the joint lies in activity modification as shown in the case below.