The lunate is a crescent-shaped carpal bone in the central proximal row that is the most commonly dislocated carpal bone, typically from a fall on an outstretched hand forcing the bone to dislocate anteriorly into the carpal tunnel.
The lunate is the most commonly dislocated carpal bone, typically following a fall on the outstretched hand that fails the perilunate ligaments progressively from lateral to medial. Perilunate dislocations and lunate dislocations require urgent closed reduction and surgical stabilisation of the carpal ligaments. Kienbock disease is idiopathic avascular necrosis of the lunate producing progressive wrist pain and collapse, related to negative ulnar variance in some patients.
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