Degenerative diseases of the elderly population are a medical term used to describe several chronic health conditions that often occur in the elderly. These diseases usually progress over time and cause a gradual loss of function in the affected parts of the body. One of the most common is osteoarthritis. This is the most common type of arthritis that occurs in the elderly and causes the cartilage in the joints to wear away, leading to pain, limited mobility, and stiffness. They usually require long-term treatment, care, and adjustment of daily life. Prevention, proper nutrition, physical activity and regular health check-ups play a key role in preserving the health of the elderly and reducing the risk of these diseases. One of the most commonly affected joints is the hip joint. Hip arthroplasty is a medical procedure that relieves pain, increases mobility, and improves the quality of life of patients. This technique represents one of the most significant achievements of modern orthopedics, enabling patients to regain the functionality and independence they have lost due to illness. Endoprosthetics consists of replacing damaged parts of the hip joint with artificial components, which restores the structure and function of the joint. Today, this procedure is a routine operation performed all over the world, with exceptional success in improving the quality of life of patients of different ages. Postoperative physiotherapy during rehabilitation after hip joint endoprosthesis has a key role in restoring the patient's functionality, mobility, and quality of life. With the expert guidance of physiotherapy procedures during the rehabilitation phases, the patient gradually achieves progress in increasing the range of motion, strengthening the muscles, and returning to normal daily activities. The plan and program of physiotherapy are adjusted individually and adjusted to the health condition and needs of the patient by applying procedures aimed at safe and effective recovery. The paper will describe the basic aspects of hip joint endoprosthesis, including indications for surgery, types of endoprostheses used, and postoperative physiotherapy in rehabilitation. Possible risks and complications associated with this procedure will also be described. Through a complete review of this topic, the understanding of the installation of hip joint endoprosthesis in restoring mobility and increasing the quality of life of people with an artificial hip joint will be approached.