Now China has entered the elderly society, such as bilateral knee swelling pain, to the inner knee pain is obvious, one station up to walk the inner knee are very painful, more can not go up and down the stairs, squatting in the toilet are very difficult, sometimes squatting can not stand up, double lower limbs standing position like “O” leg, this patient is now really a lot, the quality of life is very poor, the family is also very painful. The quality of life is very poor, and the family is also very painful, like this patient how to do? In fact, patients like this is called “degenerative knee joint”, medically called “knee osteoarthritis (OA)”, osteoarthritis (OA) is a serious health risk to the elderly chronic progressive bone and joint disease, with the aging of the social population, The incidence of the disease is on a significant rise, reaching 50% in people over the age of 60. The incidence of osteoarthritis is increasing significantly with the aging of the population, reaching 50% in people over the age of 60. The ultimate disability rate of the disease is 53%. Clinically, joint pain, osteophytes and restricted movement are most common, mainly due to degenerative wear and tear of joint cartilage, radiographs show osteophytes, with any conservative method can only treat the symptoms but not the root cause, the only best method is late surgical treatment —- knee surface replacement, after surgery in about three months never say pain, joint function is also good, the following are some of the diseases I have done in the past two years to take out to everyone Look, I hope you can understand this disease. I: first, let you know the normal knee radiographs, this is the normal knee film: two, the following are a few patients with osteoarthritis of the knee pre-operative and post-operative X-rays: this is the pre-operative X-rays, the patient female, 76 years old, bilateral knee pain for five years, aggravated for six months, to the right side of the pain is obvious, walking difficulties, can not go up the stairs, double lower limbs O-leg, this is the pre-operative film: she is now mainly the right side of the pain is obvious, but both sides of the knee inversion deformity. I did the right side first, and this is the post-op film of the right side. Four months later, she had no pain on the right side, but the pain on the left side was obvious, and she asked me to do the other leg for her. This is her second post-operative film.