subluxation
Pronunciation: sub-luk-SAY-shun
Partial dislocation of a joint where bone surfaces remain in partial contact but are not properly aligned.
Full Definition
An incomplete joint dislocation where the articular surfaces of bones lose normal contact but maintain some degree of overlap, unlike a complete dislocation where contact is entirely lost. Subluxation can result from trauma, ligamentous laxity, or developmental abnormalities. The condition may be acute (sudden onset) or chronic (recurrent), and can affect any joint in the body. Treatment depends on the severity and may range from closed reduction and immobilization to surgical stabilization.
Usage
Usage note: Distinguish from complete dislocation (total loss of contact) and sprain (ligament injury without joint displacement).
In Context
- "X-rays revealed anterior subluxation of the humeral head." — Radiology report
- "The patient experienced recurrent patellar subluxation during sports activities." — History and physical