what is avn lunate
Kienbock's disease (avascular necrosis of the lunate) Overview. Kienbockâs disease is an idiopathic condition, meaning there is no known cause. Narrowing of the arteries reduces blood supply and subsequent necrosis (death of cells and tissue) in the lunate, one of the primary bones of the wrist.
Kienbockâs is avascular necrosis of the lunate, which a central bone of the wrist, or radiocarpal joint. The lunate articulates directly with the radius (one of two bones in the lower arm) and has key ligament attachments that stabilize the wrist area.