After the artificial knee replacement, many patients have been relieved of their painful symptoms! However, while they are happy, many patients are also worried that the prosthesis will not be as durable as their original one. Is it easy to loosen? In fact, with the continuous improvement and updating of surgical techniques, materials and prosthesis design, the life span of joint prosthesis has been greatly extended, and for most people, “lifetime” has become possible. However, this does not mean that all people are 100% immune to loosening. So, what are the causes of joint prosthesis loosening for some people? 1. Loosening due to joint infection. For patients after artificial knee replacement, infection is a disaster, joint infection can lead to loosening of the artificial joint; 2, polyethylene liner wear sequelae. Simply put, the polyethylene material in the joint prosthesis wears away, and these worn particles can act between the prosthesis and the bone, gradually “eating” the bone and causing the joint to loosen as it erodes the bone. Of course, this polyethylene material has been greatly improved and the chances of this happening are greatly reduced. In addition to the above factors, many elderly patients are also very concerned about their own osteoporosis, whether they are more likely to loose joint prosthesis? There is no denying that the support of the bones of osteoporotic patients for joint prostheses is reduced. With a conventional knee prosthesis, the chances of early joint prosthesis loosening are higher for patients with severe osteoporosis. Although the likelihood of prosthesis loosening is higher in osteoporotic patients than in the general population, this is not without remedy: 1. Install joint prosthesis extension rods. Conventional joint prosthesis surface and bone contact area is limited, in this limited area, if the bone itself “quality” is not good, of course, there will be insufficient support. But if at this time in the conventional joint prosthesis based on the assembly of a lengthening rod, as if more bones together to support the prosthesis, so that the chance of loosening will be greatly reduced; 2, enhance the bone itself “quality”. For patients suffering from osteoporosis, post-operative rehabilitation exercises according to the doctor’s guidance, to increase a certain amount of activity, while targeted anti-osteoporosis treatment, so that the bones themselves hardened, the support is strong.