Modular NeckTotal hip arthroplasty made its debut about 60 years ago. As with most new technologies, it was anticipated that advances and improvements would occur. However, the improvements have been incremental and in some cases have led to problems, particularly with regard to interchangeable parts, modularity, and the materials used for articulating surfaces. Some still believe that total hip arthroplasty was close to being optimized at the time that it was introduced.

Some may view these comments as somewhat provocative, but I would not be surprised if a lot of surgeons agree. The issue of trunnion wear is one example of these problems.

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