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Static quads
Static quads are very early knee rehabilitation exercises to activate the quadriceps muscle of the lap.
Stem cell
A stem cell is an unspecialised cell with a remarkable ability to divide over and over and become differentiated into another type of cell, replacing damaged body tissue.
Stem cell line
A stem cell line is a commercial culture of stem cells all derived from the same original cell source, which has been allowed to multiply.
Stem cells
Stem cells are unspecialised cells with a remarkable ability to reproduce and become differentiated into another type of cell, replacing damaged body tissue.
Step ups
Step ups are knee rehabilitation exercises for rebuilding early quadriceps muscle strength.
Steroids
Steroids used in orthopaedics are hormonal drugs used to suppress inflammation.
Stiff knee
Knee stiffness can be a result of fluid in the joint, adhesions or scar tissue in the tissue folds, bony deformity or other mechanical obstructions. Page updated February 2024 by Dr Sheila Strover (Clinical Editor)
Straight leg raise
A straight leg raise is knee rehabilitation exercise to strengthen the quads muscles, but it is also used by surgeons to give a quick idea of the activity of the quads after surgery.
Stromal vascular fraction
Stromal vascular fraction is the name given to a portion of tissue extracted by enzymes from microfragmented fat.
Stutter test
The stutter test is a test for the presence of a symptomatic medial synovial plica in the knee. Page updated May 2024 by Dr Sheila Strover (Clinical Editor)