Hello, As per our knowledge, Kienbock disease also known as avascular necrosis in which the lunate bone, one of eight bones in the wrist, suffers the blood loss which leads to death of the bone. Basically, the treatment options depend upon the severity of the disease.
In the early stages, the treatment can be observation or immobilization. And for more advanced stages, usually, surgery is recommended. Hand therapy is only designed to relieve pain and restore function and not for changing the course of the disease. For further and better treatment, you can consult any orthopedist.
To ease your search, you can refer to our list of - Orthopedists in Kolkata.
Hope our answer helps you.