Femoral head necrosis, known as aseptic necrosis of the femoral head or ischemic necrosis of the femoral head, is a lesion caused by localized poor blood flow to the femoral head due to various reasons, which leads to further ischemia, necrosis of bone tissue, fracture of bone trabeculae and collapse of the femoral head. According to incomplete statistics, there are about 30 million people suffering from this disease worldwide, and about 4 million in China. Especially since the introduction and widespread use of hormones, the incidence of femoral head necrosis has gradually increased. The Department of Orthopaedics of Shanghai Second Medical University Ninth Hospital introduced the international leading orthopaedic extracorporeal shock wave technology and OssaTron shock wave therapy instrument into China, and used this non-surgical method to launch an attack on the orthopaedic disease of femoral head necrosis. On January 28, 2005, the treatment was approved by the Shanghai Medical Association for clinical access. Shockwave therapy is performed under local anesthesia or epidural anesthesia. 3-5 shock points are selected for each site, with 1,000 shocks per point, and one treatment session lasts one hour and 1-2 days of hospitalization. Shock wave treatment can also be used for bone discontinuity, frozen shoulder, muscle attachment point inflammation and other diseases. Shockwave therapy for bone nonunion Bone nonunion, i.e., non-union of fractures, is a common complication of fractures. The increase in traffic accidents has led to an increase in the number of serious bone injuries and the subsequent increase in the occurrence of osteonecrosis. Once bone discontinuity occurs, the bone healing process will stop and the bones will lose their continuity, making it impossible for the patient to perform normal activities, resulting in functional disability of the limb. The main symptoms of the patient are pain, limited movement, and abnormal movement of the fracture site. Traditional conservative treatments are helpless for these diseases, and repeated surgeries bring great pain and huge financial burden to patients. Orthopedic extracorporeal shock wave technology first originated in urology with extracorporeal shock wave lithotripsy. 20 years ago, when urologists used shock wave lithotripters to treat ureteral and bladder stones, the energy of the shock wave was increased because the shock wave had to pass through the patient’s iliac bone. A very significant phenomenon occurred at this time, as all patients experienced thickening of the iliac bone after treatment, which was most pronounced in the area through which the shock waves passed. Obviously, the reason for the rapid growth of bone tissue was the stimulation of the shock waves. The scientists did not ignore the “side effects” of this lithotripsy, and subsequent basic research on the effects of shock waves on bone and soft tissue growth showed that shock waves have a significant effect on bone and soft tissue healing, not only from the mechanical stimulation of the shock waves, but also from the biological effect on osteoblasts “waking up”. This effect is not only from the mechanical stimulation of shock waves, but also from the biological effect on osteoblasts. The orthopedic extracorporeal shock wave technique has been widely performed in most countries in continental Europe, the United States, Korea, and Taiwan with world-renowned success. It has been reported to have a 79% success rate in the treatment of bone discontinuities, which is superior to traditional surgical methods. The non-invasive nature of this technique has been universally welcomed by patients. Shockwave therapy is not surgery at all, but is more like traditional physical therapy, except that local anesthesia is used when needed. Our preliminary results also show that shockwave therapy has a good effect on bone discontinuity. Shockwave therapy is usually performed under brachial plexus or lumbar anesthesia in a 2-3 day hospital stay, with 3-4 points per treatment area, 1000 shocks per point, and a duration of about 15 minutes, with no significant discomfort during the treatment.