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2. Osteoarthritis - Wikipedia

   en.wikipedia.org/wiki/Osteoarthritis

   Osteoarthritis (OA) is a type of degenerative joint disease that results from breakdown of joint cartilage and underlying bone. [5] [6] It is believed to be the fourth leading cause of disability in the world, affecting 1 in 7 adults in the United States alone. [7]

3. Knee arthritis - Wikipedia

   en.wikipedia.org/wiki/Knee_arthritis

   In osteoarthritis, there is a loss of articular hyaluronic acid activity, likely contributing to pain and stiffness associated with the condition. Hyaluronic acid injections are an FDA-approved treatment for osteoarthritis of the knee, and are sometimes also used for other joints. However, the merits of HA injections are still disputed.

4. Radiographic classification of osteoarthritis - Wikipedia

   en.wikipedia.org/wiki/Radiographic...

   Joint space narrowing is defined by this system as a joint space less than 3 mm, or less than half of the space in the other compartment, or less than half of the space of the homologous compartment of the other knee. II: Obliteration of the joint space III: Bone defect/loss < 5 mm IV: Bone defect/loss between 5 and 10 mm V

5. Knee pain in the US increased 65% over the past 20 years ...

   www.aol.com/help-knees-doing-easy-exercises...

   Osteoarthritis is often the cause of knee pain, especially for women and older adults, according to the Arthritis Foundation. But sore knees may also result from an injury, weak or tight muscles ...

6. Knee - Wikipedia

   en.wikipedia.org/wiki/Knee

   The knee is a modified hinge joint, a type of synovial joint, which is composed of three functional compartments: the patellofemoral articulation, consisting of the patella, or "kneecap", and the patellar groove on the front of the femur through which it slides; and the medial and lateral tibiofemoral articulations linking the femur, or thigh bone, with the tibia, the main bone of the lower ...

7. Knee cartilage replacement therapy - Wikipedia

   en.wikipedia.org/wiki/Knee_cartilage_replacement...

   Osteoarthritis is a common condition of cartilage failure that can lead to limited range of motion, bone damage and invariably, pain. Due to a combination of acute stress and chronic fatigue, osteoarthritis directly manifests itself in a wearing away of the articular surface and, in extreme cases, bone can be exposed in the joint.