Metallosis, Trunnionosis, and Head-stem Dissociation of the Exeter v40 Stem in a Metal-on-Metal Hip: A Unique Case

This case report, to the best of our knowledge, is the first to report catastrophic failure of a metal-on-metal hip caused by trunnionosis and subsequent head-stem dissociation. We report successful management of this unique case and hope to highlight the complexities and challenges associated with metal-on-metal THR. This case report is aimed at raising clinical awareness of this rare complication which requires expert management for a successful outcome.