It should be whether the epiphysis is closed or not. To know whether your epiphysis is closed, you can judge by the epiphysis of the metaphysis of the long bone. It is recommended to go to the regular hospital for X-ray examination, and finally the doctor to give the correct judgment. If you want to know whether your epiphysis is closed or not, you can take an X-ray examination. By taking an orthopedic X-ray of the knee joint, you can see whether the epiphysis of the lower end of the femur and the upper end of the tibia are closed or not. X-rays of the forearm, including the elbow and wrist joints, can also be taken to see whether the epiphyses of the proximal ulnar radius and the ulnar radius at the wrist are closed. By observing the X-ray, if it shows a wide translucent band, it proves the presence of epiphyses, indicating that the bone is not yet closed; if it shows a tight slit, and it is seen that the epiphyses of the ends of the long bones have disappeared, it can be judged that the bone is closed.