Therapeutic apparatus of femoral head necrosis was invented by Professor Huang through 20 years of research with intense focus. There is no similar apparatus overseas or in China, as recognized by many experts. Later, Dr. Jinguo He, a postdoc of National Laboratory on Machine Perception, Peking University, joined the research to standardize the therapeutic system through computerized autocontrol.

        The apparatus was designed on the basis of the WOLLF’s law―osseous rebuilding is determined by the application of intraosseous stress. Later, the law was developed from the theory that intraosseous SGP (stress-generated potentials) can cause reaction of osteocytes and specific electric signals can also cause intraosseous stress. Both the stress and the electric signals can cause reaction of osteocytes. The apparatus can output electrical stimulation of different wave forms according to specific conditions of individual patients, to the acupuncture points of the necrotic femoral head. The stimulation is delivered along with valuable traditional Chinese medicine, being introduced to the necrotic area of femoral head. The electric signal reinforces infiltration of the medicine using a heating effect. The medicine has the following functions: supplies microelements such as: Ca, P, Mg, Zn, dilate capillaries, eliminates inflammation, and promotes the synthesis of VitD. In this way, two strong factors contribute to the regeneration, rebuilding and remodeling of the necrotic femoral head.   

        So the characteristics of the apparatus are attractive as there is no operation, no injury and no suffering involved. The result of using the apparatus is that necrotic femoral head can be repaired, the form and structure of the head can be rebuilt, weight-bearing ability of the head can be improved, and the joint space and function of hip joint can be increased. 

         The size of the apparatus is relatively small. The results are strong. The operation of the apparatus is simple and safe. The efficacy is definite, with an efficacy ratio of 97.2%.