The extensor mechanism consists of the anatomical structures which work together to straighten the knee.
The patella plays a key role in this process by altering the 'lever arm' and thus the mechanical forces involved.
|The patella is a sesamoid bone, which means that it is integrated in the tendon of the quadriceps muscle.|
|The rectus femoris is the central part of the quadriceps muscle.||The four heads of the quadriceps all pull through the common quadriceps tendon|
Extensor Mechanism Disruption after Total Knee Arthroplasty: A Case Series and Review of Literature. Vaishya R,Amit Kumar Agarwal AK and Vijay V. Cureus. 2016 Feb; 8(2): e479.