Arthrosis of the knee joint is an age-related disease. The normal cartilage surface of the joint is worn away, the main reason for this being long-lasting knee overuse (especially in overweight patients), injuries to the meniscus or tendons, and above all, fractures in the knee region.
A worn-out knee is characterised by thinning and degradation of the joint cartilage. This condition is commonly called arthrosis and is frequently accompanied by pain. At first, the pain only occurs on straining, but progresses over time until it is also felt while resting. The pain increases gradually, often over several years.
The knee is a very complex joint connecting the femur (thigh bone) and tibia (shin bone). More specifically it consists of the round femoral condyles and the flat tibial plateaus. The joint surface is covered by a smooth articular cartilage that cushions and enables smooth movements of the joint. After long years of use, the cartilage layer may wear thin or even wear out completely. Knee movement becomes restricted and painful. Additionally, bone spurs emerge, which only worsen the already limited joint mobility. In advanced cases, the knee mobility is severely impaired. Also, the weight-bearing axis is changed, which only worsens the problems.