MRI Right Knee 27^th June 2008

TECHNIQUE: Standard sequences with additional sagittal T2 and axial STIR

This survey is part of a study to compare two different scoring systems commonly used by surgeons to assess the success of knee surgeries.

This survey is part of a study to compare two different scoring systems commonly used by surgeons to assess the success of knee surgeries.

Patellar instability - subluxation or dislocation - can be congenital or acquired. A congenital condition is a condition someone is born with. An acquired condition is a condition that comes on due to injury or incorrect surgery.

Previous blogs have discussed the patella as a sesamoid bone and on the patella as part of the extensor mechanism.

I mentioned there that the patella is a bone that exists within the tendon of the quadriceps muscle, and that the muscle is tethered above to the hip and bits of it to the upper femur, and that it is tethered below to the tibia bone.

There are quite a lot of medical words that need to be absorbed before one can confidently talk about the patella and its problems, and the extensor mechanism falls into that group.

The patella (kneecap) is a 'sesamoid bone'. A sesamoid bone is a bone that develops in a muscle tendon, rather than being attached by ligaments to another bone. The tendon in which the patella develops is the tendon of the quadriceps muscle, the big muscle that makes up the bulk of your 'lap'.