Primary total hip arthroplasty and increasing modularity: does one size fit all?

摘要

Not so long ago, the resurgence of alternative metal-on-metal bearing couples in total hip arthroplasty (THA) was touted by some in the orthopedic community as the solution to polyethylene wear and aseptic loosening. Unfortunately, we now know that every bearing surface and implant design is capable of generating particulate wear debris that can eventually lead to implant failure. Moreover, in recent years, several newly designed hip implants have demonstrated significantly higher failure rates than anticipated, and these implants have subsequently been removed from the market.