Patients often ask what materials are used to make artificial joints. How should I make a choice of materials? What is the approximate cost of these materials? How long is the hospital stay for artificial joint surgery? Here is a general explanation: The selection of materials for artificial joints refers to the selection of the friction interface, which in turn is mainly for artificial hip replacements. The specific friction interface includes: metal to ultra-high polymer polyethylene, ceramic to ultra-high polymer polyethylene and ceramic to ceramic, etc.; the cost of different materials varies from 30,000 to 50,000 sets, and the ceramic to ceramic friction interface is the most expensive, mainly because from the perspective of wear and tear, the ceramic to ceramic friction interface has the least wear and tear, which in layman’s terms is more wear-resistant. So is it the best to choose the most expensive material? The most suitable material for the patient’s condition should be selected. The so-called patient condition refers to the patient’s age, gender, the disease, the general condition, family economic status and lifestyle and even sports hobbies and so on. These are all factors that the surgeon will consider when helping the patient choose the material. The typical length of stay for an artificial joint replacement is 10 to 14 days. After returning home, a period of rehabilitation is required, as instructed by the surgeon. Of course, the above is a general rule, but each patient’s condition is different and requires a specific analysis.