Osteoarthritis of the knee
Everything you need to know

The articular surfaces of the knee joint are covered by a layer of cartilage. When this layer gradually starts to wear, the diagnosis will be: osteoarthritis of the knee joint. Physicians also describe this joint wear as gonarthrosis. It is one of the most common conditions caused by joint wear. Owing to the damaged cartilage in the knee, the pressure on the bone underneath increases. To compensate, the articular surface gets bigger and bony points develop on the edge. This makes the knee joint less mobile, and the cartilage damage increases. The bones move closer together, and the joint space becomes narrower. In the later stages, when the bones lie on top of each other almost without any protection, and the joint space has disappeared completely, the knee will become immobile and stiff.

Osteoarthritis of the knee is a slowly progressing condition. That’s why those affected feel hardly any pain or restrictions at the beginning. Therefore, osteoarthritis of the knee often remains undetected for a long time. One of the first symptoms: after extended periods of rest, the knees will hurt and make cracking sounds during movement. Over time, every strain on the joint will cause severe pain. This is usually when those affected will visit the physician. Using X-ray imaging, the physician can check the distance between the articular surfaces as well as the characteristics of the joint surfaces and cartilage tissue.

In cases of “primary osteoarthritis”, no causes of the condition can be found. Scientists assume there is a hereditary predisposition. However, the exact reasons have not been sufficiently investigated. When external factors cause cartilage wear in the knee, this is known as “secondary osteoarthritis”. If the knee is subjected to a lot of strain or inappropriate mechanical stress, the result can be osteoarthritis. That’s why osteoarthritis of the knee is more common in occupational groups with a lot of strain on the knee or athletes. Obesity as well as a lack of exercise can also promote the development of osteoarthritis of the knee. A misalignment of the legs can cause one-sided wear. Knock knees, for example, lead to osteoarthritis of the outside of the knee (valgus osteoarthritis), and bandy legs result in osteoarthritis of the inside of the knee (varus osteoarthritis).

Existing cartilage damage cannot be reversed. The aim of treatment is therefore to delay the progression of the condition, to alleviate pain, and by doing so, to improve the quality of life for those affected. An important aspect of treatment is physiotherapy because movement is the proven method for pain reduction. However, many patients rest their knees because the pain increases with strain. How can we escape from this vicious circle? The answer is to wear a knee support or orthosis during the activity. This is based on the fact that supports or orthoses for osteoarthritis of the knee gently distribute the pressure on the joint and thus significantly reduce pain. An active and healthy lifestyle with the appropriate diet can delay surgery and prevent the need for knee replacement.

Self-test: do you suffer from osteoarthritis of the knee?

If you’re not sure whether you suffer from osteoarthritis of the knee, our self-test can provide an initial assessment. You should, however, visit an experienced physician to get a more precise, reliable diagnosis.

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Osteoarthritis of the knee

How Jana gets going despite the condition

Osteoarthritis patient Jana dismissed the early signs of her osteoarthritis of the knee for many years. It was a painful fall that eventually caused her to wake up. Now she does everything to remain mobile and to enjoy life.

Find out more about Jana and her story

Osteoarthritis of the knee – what can be done at diagnosis and beyond?

Whether you have only just been diagnosed with osteoarthritis of the knee or you have known about your condition for a while – visit our advice portal to find treatment options, patient journeys and information about our products. We will help you choose a suitable medical product and get your pain under control.

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The basic concept of conservative osteoarthritis treatment is: lots of exercise, little stress.

Prof. Dr. med. Stefan Sell
Medical Director Gelenkzentrum Schwarzwald

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