Surgery for bone augmentation is generally performed by osteotomy of the long tubular bones of the lower extremities, followed by the use of a circular external fixation frame. The cost of the surgery generally includes the following items: materials cost about 30,000 yuan, surgery cost about 5,000 yuan, general anesthesia cost about 5,000 yuan, and epidural anesthesia about 1,000 yuan, preoperative examination and treatment about 3,000 yuan, medication about 3,000 yuan, and the sum of the above costs is the total hospitalization cost The sum of the above is the total hospitalization cost.