The surgical procedure for radial head replacement is as follows: 1. The patient is placed in the supine or lateral position with the affected limb on top, the affected limb is disinfected, the surgical sheet is laid, the elbow joint is exposed, the affected limb is placed on the chest, a balloon tourniquet is used, the incision starts above the lateral epicondyle of the humerus, the ulnar carpal extensor and posterior elbow muscles are extended distally through the elbow joint, the length is about 6 cm, the gap between these two muscles is separated, the joint capsule of the elbow joint is exposed, the external measurement of the joint capsule is revealed. According to the type of fracture, the annular ligament is cut longitudinally perpendicular to the fibrous course, and the motor branch of the radial nerve (posterior interosseous nerve) passes around the radial head, and the forearm should be kept rotated forward and the posterior rotator muscle should be avoided to protect this nerve during the exposure. The radial neck is cut close to the biceps node. The proximal radial cavity is trimmed and polished with a special medullary file to facilitate implantation of the prosthesis. The proximal articular surface of the radius is excised smoothly so that the radius and the neck of the prosthesis can be completely anastomosed. 2, first use the medullary file to expand the medulla, after which the prosthesis is disassembled, using the prosthesis as a trial model, the direction is as described before, reset after installation in place, check the stability after reset, flexion and extension for dislocation, if the check is appropriate, disassemble the bone cement, wait until the dough period, roll it into thin strips, place it in the medullary cavity, compact it by hand, after which the prosthesis is placed, the direction is the proximal articular surface facing outward, while removing the bone cement, wait for the bone cement to harden After the cement hardens, the joint is reset and checked again for stability. 3, suture the annular ligament, leave the negative pressure drainage tube, layered suture, elbow joint flexion 90 degrees position, compression bandage, postoperative treatment; 3-5 days to remove the compression bandage, replaced by a thinner dressing bandage, elbow joint light activity, should avoid the elbow joint too rough functional exercise, prosthesis specifications: head diameter 20mm ,head height 9mm, shank length 50mm, shank diameter 5mm, the current according to At present, according to the average diameter of the radial tuberosity in China, there is only the smallest (1) type of prosthesis, which can meet the needs of most patients, but for patients below 1.5 meters, this type of prosthesis may be slightly larger and is not recommended.