Since the introduction of Dr. John Charnley’s “low-friction arthroplasty” in 1962, the general concepts of total hip arthroplasty have remained greatly unchanged. He laid the foundation for a predictably successful surgical intervention for an ailment previously difficult to treat. The low-friction arthroplasty featured a monoblock stainless steel femoral stem, high density polyethelene, self-curing polymethyl-methacrylate (PMMA), and aseptic technique. Although the general principles of arthroplasty have remained remarkably similar implant design has evolved over the past 50 years.The following is a review of the evolution of the femoral stem.
Briggs, Dustin. "The Evolution of the Femoral Stem Design in Total Hip Arthroplasty." UNM Orthopaedic Research Journal 2, 1 (2013). http://digitalrepository.unm.edu/unm_jor/vol2/iss1/10