Joint space narrowing is when the bones of femur and tibia are closer together than normal, recognised on an X-ray taken from the front.

 

What causes joint space narrowing?

Joint space narrowing is usually due to loss of the meniscus tissue which normally pads the space between these bones. It may also be due to thinning of the joint cartilage.

medial joint space narrowing on both sides joint space narrowing in the knee  
Medial (M) joint space narrowing on both sides. The lateral (L) side is normal. X-ray demonstrating joint space narrowing on the one side of the knee.  
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Discussion looking at the alternatives to a joint replacement in active patients whose osteoarthritis tends to be limited.

The reasons why doctors nowadays try to preserve the meniscus.

An 'interpretation' of a 2006 publication where the conclusions were rather uncertain as to the benefits of strength training in preventing the progression of osteoarthritis.

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CLINICAL PUBLICATIONS

Quadriceps weakness predicts risk for knee joint space narrowing in women in the MOST cohort. Segal NA, Glass NA, Torner J, Yang M, Felson DT, Sharma L, Nevitt M and Lewis CE. Osteoarthritis Cartilage. 2010 Jun; 18(6): 769–775.


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