Recurrent and radiographically unrecognized iatrogenic intra-prosthesis hip dislocations.

Hip dislocation is a common complication after total hip arthroplasty surgery. Newer prosthetic implants aim to reduce the risk of dislocation. The new dual mobility implant has a unique design that may result in intra-prosthetic dislocation. We report a case of a recurrently missed iatrogenic intra-prosthetic dislocation following closed reduction efforts in the emergency department (ED). Emergency physicians must be aware of the design, pitfalls, and management of this new prosthetic hip design.