Don't worry too much. At present, this kind of operation has been very mature in clinical application, with a history of forty or fifty years. In developed countries, people change their femoral heads whenever there is a problem, because they can have a good quality of life in the future. You know, Liu Huan just got this disease, changed it, and now he is recovering well. If you don't believe me, you can find the answer online. After the operation, your father held the crutch for three months, and then checked it again. There is basically no problem. You should pay attention to what the doctor says in your life, and you will be fine!