Spontaneous reduction of dissociated components of modular bipolar hip prosthesis?a case report

Abstract

Three years after modular bipolar hemiarthroplasty for avascular necrosis of the femoral head, a patient's modular head and neck components became dissociated following a minor twist of the lower limb. Spontaneous reduction of the components took place subsequently while the patient was asleep. The mechanism of dissociation is discussed. This unusual late traumatic head and neck dissociation followed by spontaneous reduction has not been reported previously.