In recent years, the amount of extremity disability, caused by the natural disasters and traffic accidents, is continually increasing and the lower extremity disability takes a big proportion.

What are the actual situations for incidence,etiology,characteristics,medical requirement of disabled people in China? How about the orthopedic staff training and academic research?Are the orthopedic surgeries for the massive patients with limb disabilities right?There is a lack of such analysis in orthopedic field.