Q: Could you tell us more about artificial joint replacement? A: Artificial joint replacement can quickly solve the patient’s pain problem while restoring the function of the joint. Replacement of the acetabulum and femur portion of the joint accomplishes the functions of the damaged joint. Q: Look at the case of a patient who had his knee replaced. Patient: “I have suffered from osteoarthritis for 8 years, I started to take painkillers, and after a few years I ate my stomach, and after replacing the artificial joints in both knees, after less than half a year of gradual recovery, I don’t feel any pain when walking anymore.” A: Osteoarthritis in the late stages will appear O-shaped legs, this is because the inside of the joints are subject to wear and tear, almost worn out, and the knee joints can not be straightened, almost impossible to walk, as shown in the figure of the joints in the walking not only flexion and extension movements, meniscus and rotary movements, we are now using the third-generation emulation knee joints better imitate the knee joints of the movement, you can maximize the restoration of the human joints of the original function. Q: Let’s look at the situation of a patient who had his hip joint replaced. Patient: “I am 81 years old this year, paralyzed after a fall at the end of last year, thought there was no hope, carried out artificial joint replacement surgery, one week after the operation can go down to the ground, and now even can play tai chi.” A: The patient suffered femoral neck fracture because of trauma, femoral neck fracture is very common among elderly patients with fracture, femoral neck fracture has a characteristic that the closer the fracture site is to the femoral head, the worse the healing rate is, and it may cause necrosis of the femoral head, and the possibility of healing is very small if the elderly patients are treated with the traditional methods of traction or nail fixation, and the patients can recover very quickly through the artificial total hip replacement surgery. With artificial total hip replacement surgery, patients can recover very quickly and can get off the ground in 2-3 days after surgery. Q: I am 26 years old, I got arthritis ten years ago, both hip and knee joints are necrotic, can not move, muscle atrophy, femur is enlarged, is it necessary to do artificial joint replacement in this case? A: The cause of the disease should be diagnosed clearly in the first place. Young patients are more likely to develop such as ankylosing spondylitis, rheumatoid arthritis and so on. The necrosis of the femoral head mainly affects both sides of the femoral head. Early stage of necrosis does not require replacement of the joint if timely and proper treatment can be provided, but once it develops to the advanced stage, artificial joint replacement is the only option. Let’s look at a case. This is a patient with ankylosing spondylitis, in addition to the spine, both hips and knees are completely stiff, through the X-ray you can see that the hip joints have grown together, this patient’s condition is a big challenge for us, because before this there is no precedent in the world to replace 4 joints at the same time, the operation was very successful, 4 months after the operation to review the situation, you can stand, and life can be self-care. Q: I had a hip replacement 6 years ago and now I want to have a new one, what should I pay attention to? A: This is a joint renovation problem, first of all, we should find out what causes the failure of the surgery, the most common late complication is aseptic loosening i.e. non-infectious loosening, in addition, if the patient does not have enough bone, he/she needs allograft bone grafting to rebuild the structure of the bone, and then proceed with the joint replacement again. A: The longest follow-up case of joint replacement surgery is 20 years. Typically, after 10 years of joint replacement, there is a survival rate of more than 95%, and after 15 years of joint replacement, there is a survival rate of 85%. Q: I got septic osteomyelitis when I was 8 months old and had a pathological fracture of the femur 2 cm above the knee joint. The doctor immobilized me in a cast and now my knee joint is straight. A: Artificial joint replacement is possible, but for infected cases it should be checked whether the patient still has potential foci of infection now. The artificial joint replacement should be done after the infection has been controlled for 1-2 years. Q: How long does an artificial joint replacement last? Does it need to be replaced after a certain period of time? A: Many factors can affect the lifespan of a joint, including the patient’s own bone mass, obesity level, activity level, etc. From the point of view of indications, if the indications are strictly controlled, the result should be very good, if the scope of indications is expanded, the life expectancy of the joint will be relatively shorter. Patients should also be aware of the need to choose a good prosthesis. Surgical technique is also an important factor in the longevity of the joint. Q: Look at an elderly patient. Patient: “I am 88 years old, due to a traumatic fracture, I had an artificial femoral head replacement, the pain disappeared after the operation, the joint function recovered after six months, and I can take care of my own life.” A: For the elderly if they are treated conservatively instead of joint replacement, some other complications such as urinary tract infection, pulmonary complications, respiratory tract infection will be brought about due to prolonged bed rest. It is very dangerous for the elderly. At present, patients are generally concerned about the price A: the price of imported joints is about 3-7 million yuan, the price of domestic joints is often within 20,000 yuan. Q: I have been suffering from osteoarthritis in both knees for more than 6 years, and the pain has become more and more severe in the past two years, and my legs have been deformed, with a little bit of rotundity. If I have knee replacement surgery, can the function of my legs be restored? Can the leg be straightened? A: Let’s take a look at a case, as shown in the picture, the patient’s leg could not be straightened at all before the operation, and it was very difficult to walk, but 4 months after the operation, the leg could not only be straightened, but also recovered its function very well. Q: My father had a fall when he had a stroke last month and fractured his hip, can he have artificial joint replacement surgery now? A: It should be said that for patients with stroke and hemiplegia, it is more important to do artificial joint replacement after fracture, so as to facilitate patient care and avoid some complications. Q: I have osteoarthritis of both knees, osteoporosis, and difficulty in walking up the stairs, can I have joint replacement in this case? A: Patients can have artificial joint replacement and it should be done bilaterally at the same time, because it is good for patients’ postoperative recovery, and when patients start to walk after the operation, the calcium will be well deposited and the bone quality will be improved. Q: I had a comminuted fracture of the femoral head due to a fall two years ago and had an artificial joint replacement. Now my thigh hurts when I walk for a long time and my foot is mildly swollen. A: First of all, we have to take an X-ray to check if the problem is caused by the surgery. In addition, some patients (especially the elderly) may have some embolism or phlebitis of small veins after the joint replacement due to the slow return of blood after the surgery, which may also cause swelling of the legs, and with the increase of walking after the surgery and gradual recovery of the function, these conditions may gradually improve.