First of all, it should be clear that both imported and domestic prosthesis are tested and qualified by the relevant national departments before entering the market, so there is a safety guarantee. However, the imported prosthesis is better than the domestic prosthesis in terms of material and technology. With the progress of domestic technology, this gap has a tendency to narrow gradually. In addition, the surgical instruments accompanying imported prosthesis are easy to operate, so the operation time can be shortened. However, the price of imported prosthesis is 1-2 times more expensive than domestic ones. Domestic joints were copied from imported joints in the early days, and the materials are basically the same, the only difference is in the production process. Meanwhile, the imported joints may have been updated to the fourth generation, while the domestic joints are still stuck in the third generation, which will affect the delicacy of the joints. As for the service life, domestic joints are a little less than imported joints. However, imported joints are more expensive than domestic joints, so the choice between the two still needs to be based on the individual’s economic situation. From what we have observed so far, there is not much difference between using domestic joints and imported joints within 10-15 years, and there may be a significant difference after 15 years, but it is impossible to predict at present. Does osteoporosis affect the longevity of artificial joints? This is a more controversial issue. On the one hand, osteoporosis is commonly referred to as the bones becoming “bad and brittle”. After joint replacement surgery, osteoporosis patients have a poor grip on the artificial joint, just like a stick in a pile of sand, it will easily fall down. Therefore, osteoporosis patients are prone to loosening of the prosthesis, which in turn affects the service life of the artificial joint. However, on the other hand, nowadays, most of the knee replacements in China are fixed with bone cement. Osteoporosis leads to “fragile” bones, and when the bone cement fixes the artificial joint, it also sticks the “fragile” bones, i.e. the bones and the prosthesis grow together. This reduces the impact of osteoporosis on the loosening of the artificial joint. Osteoporosis is often caused by diseases or medications, such as rheumatoid arthritis or hormone use. In addition, joint pain that prevents walking can also cause bone loss. After artificial knee replacement, patients are able to walk for exercise and sunbathing, so that the bone quality can be improved instead.