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How TT-TG Distance is measured, and what it means.
Interpretation by the Editor of a 2017 published medical paper studying long term problems in patients whose original patellar dislocations were not surgically managed.
Video demonstrating the J sign
This is the Editor's interpretation of a paper published in the orthopaedic literature in 2016.
An overview by Dr Lars Blond.
This discussion and video relates to the basic...
Instability in the patella means that it jumps to the edge or out of the normal track in the femur in which it lies.