Artificial joint knowledge

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The artificial joint is designed based on artificial organs, metallurgy, biological materials science, biomechanics and orthopedic surgery d


The artificial joint is designed based on artificial organs, metallurgy, biological materials science, biomechanics and orthopedic surgery development on the destruction and loss of function has been used to replace human joints, relieve symptoms, improve the function of the objective. According to the characteristics of the joints of the body, a variety of artificial joints are designed. At present, artificial joint is the best artificial organ, and the artificial joint and artificial hip joint and knee joint are the most effective. Other joints, such as artificial shoulder joint, elbow joint and ankle joint replacement, are also under development.

Since nineteenth Century, people have tried to use artificial joints for the treatment of advanced joint diseases. After a long exploration,

British physician Sir John Charnley in 1962 to design a metal femoral head and a combination of high molecular polyethylene acetabular prosthesis. Because of its low friction, stability and low loosening rate, artificial hip replacement has been greatly developed. So far, Charnley artificial hip joint is still used as a measure of other artificial hip joint "gold standard", so he is also recognized as the father of modern artificial joint.

On the basis of the success of the artificial hip joint, people have carried on the thorough research to other joints. After more than 30 years of clinical practice, with the progress of processing technology and material science, a variety of artificial knee joints have been introduced. The curative effect of artificial knee joint has been further improved, making it one of the best artificial organs, John n. Insall has made a great contribution.

Why artificial joint replacement

Artificial joint replacement is already lost function of the joints to be trimmed, in particular the artificial joint to regain function, relieve pain, joint deformity correction and stability, to improve joint activities. The artificial joint is very important for the patients who have been destroyed by the joint and the other methods are invalid. The emergence of artificial joints, so that many of the past can not cure the joint disease has a cure. So that many can only rely on crutches to walk the severe destruction of patients with advanced joints, can walk like a normal person, so that some patients in bed for a long time, to get the walking function, began a new life.

The effect of artificial joint replacement

The effect of artificial joint replacement is determined by patient confidence, physician skills, bioengineering, and the design of prosthesis and instrumentation. Over the past half century, the technology of artificial joint has been developed and improved, which has become a major method for the treatment of advanced joint diseases in the Department of orthopedics. It is regarded as a milestone in the development of Department of orthopedics in twentieth Century. At present, artificial joint surgery has become a very successful operation, it can relieve and eliminate joint pain, restore joint function. People who suffer from long-term joint pain can walk, travel, work, shop and do physical exercises like normal people after surgery. Because of the accuracy and feasibility of artificial joint surgery, more patients are willing to accept this kind of operation. Currently, only about 550 thousand people in the United States each year to receive artificial joint replacement surgery, and there is an increasing trend year by year.

What is hip arthroplasty and hip replacement

The artificial hip joint consists of two parts: the femoral prosthesis and the acetabular component. The prosthesis is composed of a metal alloy with good biocompatibility and a wear resistant high molecular polyethylene liner. The femoral prosthesis includes bulb and body dry bulb, smooth solid alloy made of body is conical, can be inserted into the proximal femur bone marrow cavity, closely combined with the femur head and body part can be assembled together. The other part is combined with pelvic acetabulum, the inner layer of polyethylene liner, a smooth wear-resistant joint with a metal ball head.

Artificial hip replacement prosthesis is used instead of the body lose the function of hip joint lesion. Total hip arthroplasty with total hip arthroplasty and total hip arthroplasty in patients with total hip arthroplasty. According to the different fixation methods, it can be divided into bone cement fixation and non bone cement fixation. Cemented total hip arthroplasty consists of three parts: a polyethylene acetabular prosthesis, a metal ball head, and a metal femoral stem prosthesis. Cementless total hip arthroplasty consists of four parts: a metal cup, a polyethylene liner, a metal or ceramic ball head, and a metal femoral stem prosthesis. The type and the fixation of artificial joint should be chosen according to the age of the patient, the pathological changes of the hip and the condition of the bone.

What disease requires pedestrian hip replacement

Total hip replacement surgery for illness or injury caused by the destruction of the hip, joint pain, disability, and seriously affected the daily life and quality of life after conservative treatment can ease the symptoms and improve. Common osteonecrosis of the femoral head, osteoarthritis, ankylosing arthritis, rheumatoid arthritis, traumatic arthritis of the hip joint destruction, pain and functional limitations. In addition to congenital dislocation of the hip, hip dysplasia, chronic dislocation or subluxation caused secondary osteoarthritis.

For elderly patients with displaced or subcapital femoral neck fractures in the elderly, because of nonunion and femoral head necrosis incidence rate is very high, also advocated by the artificial joint replacement in patients with early rehabilitation, self-care, improve the quality of life

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