P
Pain in the back of the knee
Pain in the back of the knee is common, and may have a number of causes, because the back of the knee is structurally complex. Page updated July 2024 by Dr Sheila Strover (Clinical Editor)
Pain score
A pain score is a scoring system used by doctors to 'measure' pain. Page updated July 2024 by Dr Sheila Strover (Clinical Editor)
Parapatellar
Parapatellar means 'along the sides of the kneecap'.
Parapatellar recesses
Parapatellar recesses are the anatomical 'gutters' alongside the patella or kneeap.
Parrot-beak tear
A parrot-beak tear of the meniscus is an oblique tear of the knee meniscus where the torn end rounds off to resemble a parrot's beak. Page updated March 2024 by Dr Sheila Strover (Clinical Editor)
Partial knee arthroplasty
A partial knee arthroplasty replaces part of the knee joint with an implant. Page updated July 2024 by Dr Sheila Strover (Clinical Editor)
Partial knee replacement
A partial knee replacement (or unicompartmental knee replacement) replaces one region (compartment) of the knee with a metal and plastic implant. Page updated July 2024 by Dr Sheila Strover (Clinical Editor)
Partial meniscal replacement
A partial meniscal replacement substitutes an irreparably-damage portion of meniscus with a substitute, such as tissue-engineered collagen. Page updated July 2024 by Dr Sheila Strover (Clinical Editor)
Partial meniscectomy
A partial meniscectomy is the removal of a part of a knee meniscus. Page updated July 2024 by Dr Sheila Strover (Clinical Editor)
Passive extension
Passive extension is the activity of assessing the amount of knee extension possible without muscle contraction, and a passive extension stretch is an exercise to keep the tissues mobile while the extensor muscles are being rehabilitated. Page updated April 2024 by Dr Sheila Strover (Clinical Editor)