The term “Kienböck’s disease” refers to  a disease in which the lunate, one of the small bones in the wrist, loses blood supply.

As living tissue, Bone requires a regular blood supply for nutrients. If the bone loses blood supply,  the bone can eventually die in a state known as osteonecrosis.

Damaging  the lunate bone can cause a stiff, painful wrist and  lead to arthritis over time.