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| AuthorsGreg A Erens, MDThomas S Thornhill, MD | Section EditorDaniel E Furst, MD | Deputy EditorPaul L Romain, MD |
Topic Outline
INTRODUCTION
Total hip arthroplasty (THA) is one of the most successful orthopedic procedures performed today. For patients with hip pain due to a variety of conditions, THA can relieve pain, restore function, and improve quality of life. Sir John Charnley, a British Orthopedic surgeon, developed the fundamental principles of the artificial hip and is credited as the father of THA. He designed a hip prosthesis in the mid to late 1960s that still sees use today. It is estimated that over 150,000 total hip arthroplasties are performed each year in the United States [1] and over 500,000 are performed worldwide.
The normal hip functions as a "ball and socket" joint. The femoral head (ball) articulates with the acetabulum (socket), allowing smooth range of motion in multiple planes. Any condition that affects either of these structures can lead to deterioration of the joint. This, in turn, can lead to deformity, pain, and loss of function. The most common condition affecting the hip in this way is osteoarthritis. Other conditions that may affect the hip adversely include inflammatory arthritis (rheumatoid arthritis, psoriatic arthritis, spondyloarthropathies, etc.), developmental dysplasia, childhood hip disorders (Legg-Calve-Perthes disease, slipped capital femoral epiphysis, etc.), trauma, neoplasms, and osteonecrosis. (See appropriate topic reviews.)
THA is a procedure whereby the diseased articular surfaces are replaced with synthetic materials, thus relieving pain and improving joint kinematics and function. Preoperative and operative issues related to THA are discussed in this topic review. Intraoperative and postoperative complications of THA are listed briefly below (see 'Complications' below) and are presented in more detail separately. (See "Complications of total hip arthroplasty".)
THA is an elective procedure and should be considered as an option among other alternatives. The decision to proceed with THA is made with an understanding of the potential risks and benefits. A thorough understanding of both the procedure and anticipated outcome is an important part of the decision-making process. For the appropriate candidate, THA can be a life-altering procedure that relieves pain, improves function, and enhances quality of life.
OUTCOMES
Published results of THA demonstrate excellent clinical, functional, and radiographic results. These results vary depending upon the implant used, surgical technique, type of fixation, biomaterials, patient age, and a myriad of other factors. THA may be performed successfully in patients ranging from the very young [2-4] to older adults (over 80 years of age) [5]. However, young and active patients must be made aware that premature failure of the replaced joint may occur if activity levels are not reduced [2,3]. Impact activities, manual labor, heavy lifting, and high intensity sports should be avoided.
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