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Knee Conditions

The knee is the largest joint in the body. It is built for weight bearing, stability and mobility. The knee complex is composed of four bones and three osseous bone-to-bone joints. These are the patellafemoral joint, tibiofemoral joint, and the tibiofibular joint.

When the knee is in its fully extended position it depends on its ligaments, meniscus, and mechanical screw home mechanism for stability. When it is in the bent position it is unstable but allows for movement in several planes.

Knee Conditions

Common conditions of joints of the knee include:

  • Knee osteoarthritis
  • Rheumatoid arthritis
  • Tibial plateau fractures
  • Patellofemoral syndrome
  • Degenerative joint disease
  • Chondromalacia

Common conditions of the muscles and tendon of the knee include:

  • Patella tendinitis
  • Ruptured quadriceps tendon
  • Quadriceps strain
  • Hamstring strain
  • Torn hamstring
  • Muscle strain
  • Gastrocnemius tear
  • Gastrocnemius strain

Common conditions of ligaments and meniscus of the knee include:

  • Anterior Cruciate Ligament (ACL) tear
  • ACL insufficiency
  • Posterior Cruciate Ligament (PCL) tear
  • Medial meniscus tear
  • Lateral meniscus tear
  • Meniscus tear
  • Unhappy triad
  • Meniscectomy
  • ACL reconstruction
  • PCL reconstruction

Common conditions of the bursa of the knee include:

  • Prepatella bursitis
  • Pes anserinus bursitis, “fluid on the knee”