Bone joint prosthesis (commonly known as artificial joint) among surgical implants is a biomaterial product mainly used for the treatment of deformity, pain or loss of function caused by degenerative lesions and other advanced bone and joint diseases. So far, knee, hip, elbow, shoulder, finger and toe joint prostheses have been developed, especially the artificial hip and knee joint replacement surgeries are becoming more and more common, and their clinical effects are remarkable, greatly improving the quality of life of the general public. How to choose a suitable artificial joint ? As we all know, the success of artificial joint replacement is closely related to the reasonable choice of prosthesis material, which is directly related to whether the artificial joint in the human body can really relieve the patient’s pain and provide long-term strong and stable joint operation. Once the artificial joint prosthesis is put into the human body, it is not easy to “replace” at will, and even if it is “replaced”, the cost is also very large, so how to choose a good artificial joint should be made under the guidance of experts to make a careful choice. Artificial hip joint The friction interface mainly includes metal-to-polyethylene, ceramic-to-polyethylene, ceramic-to-ceramic and metal-to-metal, etc., which have their own advantages and disadvantages. Metal-to-polyethylene is the most widely used friction interface at present, which is relatively inexpensive but prone to produce polyethylene wear particles inducing loosening of the prosthesis; ceramic-to-polyethylene wear interface has a smaller degree of abrasion than the former, with good impact resistance, and is now well promoted at home and abroad; ceramic-to-ceramic interface, with an annual abrasion rate of only 1/10 of that of the traditional metal-to-polyethylene interface, is suitable for young patients with a greater amount of activity, but it is prone to fragmentation, and it is not suitable for patients with a greater amount of activity. It is suitable for young and active patients, but it is easy to break and have abnormal noise; Metal-to-metal joint interface is more used in foreign countries, and the wear rate is the smallest, but it can be due to the wear of metal debris metal deposit disease, and its safety needs to be further researched. Artificial knee joint Its friction interface is mainly metal to polyethylene at present. The fixation of artificial hip joints mainly includes biotype fixation and bone cement fixation. Cemented fixation may be considered for some patients with poor bone quality around the hip (e.g., osteoporosis) or for older patients with a shorter life expectancy, while biologic prostheses are recommended for fixation in most younger patients with better bone quality. Bioprostheses allow for good fixation with the ability of autogenous bone to grow in, and they are easier to remove for revision with less bone loss. There are two methods of artificial knee prosthesis fixation: cemented fixation and biologic fixation, but the mainstream fixation is cemented fixation, which has been proved to be clinically effective by evidence-based medicine.