For the treatment of osteoarthritis of the hip caused by acetabular dysplasia with artificial joint replacement surgery, the most important concern for patients, their families, and physicians is the service life of the artificial joint. In this regard, experts suggest that before deciding to adopt the joint replacement treatment program, it is necessary to repeatedly communicate and discuss with the doctor, and the replacement surgery should pay attention to the individuality and the details of post-operative maintenance. Generally speaking, there are many factors that determine the lifespan of an artificial joint (joint prosthesis), but there are two main factors, i.e. wear and loosening. That is, the more wear-resistant the artificial joint is and the less it loosens, the longer its service life will be. Wear and loosening of artificial joints are related to the following: First, the degree of wear and loosening depends on the materials used to make the artificial joint and the manufacturing process. First, the degree of wear and loosening depends on the material and manufacturing process of the artificial joint. The friction interface of the traditional artificial joint is cobalt chromium molybdenum alloy corresponding to polymer polyethylene (i.e., the alloy rubs against polymer plastic). Obviously, polymer plastics are softer than alloys, and their average wear rate is only 0.1-0.17 millimeters per year. The powder-like particles produced as a result of wear can lead to osteolysis of the bone surrounding the artificial joint, and may eventually cause loosening of the artificial joint and necessitate a second revision surgery for the artificial joint. In recent years, the materials used in the manufacture of artificial joints have been continuously developed, using ceramic-to-ceramic or alloy-to-alloy methods at the friction interface. It can reduce the wear and tear of the artificial joint, thus prolonging the service life of the artificial joint. The artificial hip joint surface replacement technology, which is newly applied to the clinic, and the metal-to-metal joint replacement surgery using a large-diameter femoral head can not only reduce the wear and tear of the artificial joint, but also obtain a range of motion similar to that of a normal hip joint, and the patient can almost restore his original life and work and improve his quality of life. Secondly, the surgical technique of artificial joint installation also directly affects the service life of the artificial joint. Improper installation of joint prosthesis may lead to impingement or change in the mechanical relationship of the joint prosthesis, which may easily cause loosening of the artificial joint prosthesis. Since patients with acetabular dysplasia are accompanied by deformities in the joint, especially the acetabulum becomes shallow, making the acetabulum unable to accommodate the artificial joint well. Therefore, if the joint is not handled properly during the joint replacement surgery, the joint can easily loosen and eventually lead to surgical failure. In addition, patients’ joint pathologies vary, and the design concepts of different types of joint prostheses vary, which in turn determines the technical differences. Therefore, it is important for the surgeon to understand the specifics of each patient’s arthropathy, to select the appropriate prosthesis, and to plan the surgery in detail in order to ensure the success of the surgery and the long term stability of the prosthesis. Useful links 4 tips for rehabilitation after joint replacement surgery Patients with acetabular dysplasia should follow their physician’s instructions for rehabilitation after joint replacement surgery and receive regular follow-ups. The following 4 practical rehabilitation tips are important to remember: 1. Walking long distances or carrying inappropriate weights will undoubtedly increase the wear and tear of the prosthesis and should be avoided as much as possible. 2. 2. Swimming, cycling and golfing are not only good for your health, but also minimize the wear and tear on your joint prosthesis. 3.Sitting on a low stool or squatting may cause the artificial joint to impact, which may lead to loosening or even dislocation of the artificial joint, which should be paid attention to. 4.Regular follow-up is good for early detection of problems and timely treatment. It also helps to prolong the service life of the joint.