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Osteoarthritis of the Knee (Knee Arthritis): "Degenerative Joint Disease" can cause pain, stiffness, and cartilage breakdown.

Edited By: Seth S. Leopold, M.D.
Last updated Monday, January 14, 2008

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Incidence and risk factors

Incidence

It is not possible to predict who will get osteoarthritis of the knee. However, there are some risk factors that may increase the likelihood that knees will become arthritic. These risk factors include:

  1. Genetics. Arthritis often runs in families.
  2. Severe trauma. Fractures (broken bones) and total removal of the supporting cartilages of the knee (meniscus) both increase the likelihood of knee arthritis.
  3. Obesity. This is associated with arthritis of the knees.

Acquisition

Osteoarthritis is not caused by an infection, though severe bacterial infections certainly can cause “post-infectious arthritis,” which is in many ways even worse than osteoarthritis of the knee.

There are some risk factors that may increase the likelihood that knees will become arthritic. These risk factors include:

  1. Genetics. Arthritis often runs in families.
  2. Severe trauma. Fractures (broken bones) and total removal of the supporting cartilages of the knee (meniscus) both increase the likelihood of knee arthritis.
  3. Obesity. This is associated with arthritis of the knees.

Genetics

Some arthritis indeed appears to run in families.

Communicability

Osteoarthritis of the knee is not contagious.

Lifestyle risk factors

There are two important “environmental” risk factors associated with arthritis of the knee. These are:

  1. Severe trauma. Fractures (broken bones) and total removal of the supporting cartilages of the knee (meniscus) both increase the likelihood of knee arthritis.
  2. Obesity. This is associated with arthritis of the knees.

Injury & trauma risk factors

Severe trauma, including fractures (broken bones) that involve the knee joint can, in time, result in arthritis of the knee. Whether this really is “osteoarthritis” or should be considered a separate kind of arthritis (post-traumatic arthritis) remains an open question, though in the severe stages of this condition, the treatments are the same.

In the ‘60s and ‘70s, it was common for surgeons to remove the supporting cartilages of the knee (meniscus) if the meniscus was torn as part of a trauma. It is now known that this, too, results in the development of knee arthritis. As a result of learning this fact, surgeons now either try to repair or minimize the portion of the meniscus that is removed should it become torn.

Prevention

By maintaining an ideal body weight and avoiding severe trauma to the knee, it is possible to minimize the risk of arthritis. However, many patients with osteoarthritis are slender and have never severely injured their knees, so there is no “guaranteed” way to avoid getting this condition.

Surgery for Knee Arthritis at the University of Washington

If you are interested in making an appointment to discuss this procedure, you can request an appointment using our online referrals website. To request a referral online, please click here. You can also call the Bone & Joint Surgery Center at 206-598-3354 or Eastside Specialty Clinic at 425-646-7777 to make an appointment.


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