patellar dislocation
Pronunciation: pah-TEL-ar
Traumatic displacement of the kneecap from its normal position in the patellofemoral groove.
Full Definition
An acute injury where the patella (kneecap) moves completely out of the patellofemoral groove, typically laterally due to the anatomical forces acting on it. This injury commonly occurs in young athletes during cutting or pivoting movements, particularly in sports like basketball and soccer. The patella usually relocates spontaneously or with gentle manipulation, but the injury often damages the medial patellofemoral ligament and may cause osteochondral fractures. Initial treatment focuses on pain control and swelling reduction, followed by rehabilitation to strengthen the vastus medialis obliquus and address predisposing factors.
Usage
Usage note: Distinguish from knee dislocation (complete joint disruption) and patellar subluxation (partial displacement).
In Context
- "The soccer player sustained an acute patellar dislocation during a cutting maneuver on the field." — Injury report
- "Recurrent patellar dislocation may require surgical reconstruction of the medial patellofemoral ligament." — Surgical consultation