Patient: description of the disease (onset time, main symptoms, hospital, etc.): 2006, due to traffic accidents in the right leg at the upper part of the knee fracture fracture, in Wafangdian City, a hospital did bone grafting surgery, in 2009, the leg plate removed, to the present has not been able to bend. Recently, in Wafangdian City, Xiongyue Township Hospital, took X-rays, according to the countryside clinic in Haicheng City, Liaoning Province, orthopedic hospital doctors said that after surgery can only be bent to 90 degrees. At present, the operation is not carried out for the time being. I would like to ask an expert to help me diagnose whether I need leg bending surgery and to what extent I can bend my leg after the surgery. Which hospital can do it well and what is the approximate cost of the surgery? Sichuan Orthopaedic Hospital Orthopaedics Liu Zhigang: can do joint release surgery, can cut to do can also be done under the arthroscope release, but the effect is not necessarily, the process of postoperative practice is more painful, but also some people will give up, if you you are determined to do it can be put effort. Patient: he is now working out at home, insisting on refusing to go to the hospital for surgery, I wonder what I need to pay attention to? Will exercising by himself cause some harm?