Spece H, Ouellette ES, Jones OL, et al. - The present study was performed to evaluate fretting corrosion, third-body polyethylene damage, and cup positioning in primary vs. revision dual mobility total hip arthroplasty. Researches obtained a total of 56 retrieved Dual mobility (DM) constructs. They evaluated inner and outer polyethylene liner surfaces for 7 damage mechanisms, and fretting corrosion was assessed for the femoral stem, head, and modular liner. Scanning electron microscopy was applied to test three polyethylene liners with the greatest amounts of embedded debris. The elemental content of the debris was ascertained by using energy-dispersive x-ray spectroscopy. The results of this study demonstrate that the most notable mechanisms of surface damage were due to third body debris, particularly for the polyethylene surfaces which articulate against cobalt-chromium femoral heads and acetabular liners. The results considered that scratching of the femoral head and the metal liner from this debris may support the clinical use of ceramic for DM bearing surfaces in the future.