Abstract
Orthopedic hip implants are one of the most successful forms of arthroplasty with survivorships of over 20–30 years, however there are still reported cases of failure within 10 years of surgery. There is a continuous demand to develop lower wearing, safer and more reliable hip implants to reduce failure rates of these devices in vivo and to provide long lifetimes to younger and more active patients receiving implants. Ultra-high molecular weight polyethylene (UHMWPE) is used in the majority of hip prostheses. There is increasing expectation that these implants will function continuously without intervention for the life expectancy of the patient. The factors that determine the success of hip implants can be separated into three main categories: (1) biomechanical, (2) biological, and (3) biomaterial factors. The implant design, surgical method, and patient variation can all contribute to the success or failure of an implant following surgery.
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