The knee is the largest and strongest joint in your body. It bears almost half your weight. It is made up of the lower end of the femur (thighbone), the upper end of the tibia (shinbone), and the patella (kneecap). These bones are stabilised by muscles, tendons and ligaments. In a healthy and pain-free knee the ends of the three bones where they touch are covered with articular cartilage. This smooth, slippery substance protects and cushions the bones as you bend and straighten your knee.
Two C-shaped pieces of cartilage called menisci act as shock absorbers between your thighbone and shinbone. They are tough and rubbery to help cushion the joint and keep it stable.
The knee joint is surrounded by a thin lining called the synovial membrane. This membrane releases a fluid that lubricates the cartilage and reduces friction.
You can find out more about the pain and the knee conditions and injuries which Dr Kennedy treats below. Dr Kennedy stresses the importance of having an accurate diagnosis of your particular condition or injury in the first instance and using this information as a guide.