title: Modular femoral head dissociation after dislocation and entrapment in reconstruction ring: a case report.
abstract: Dissociation of modular components is an infrequent potential complication characteristically unique to modularity. We present a patient in whom dissociation of the modular femoral head occurred at attempted closed reduction after dislocation, with the intraoperative findings including entrapment of the head between the rim of a reconstruction ring and the acetabular bone. In the case a dislocation in a patient that was previously reconstructed with a reinforcement ring and a modular femoral stem occurs, dissociation of the modular head should be considered as an extremely uncommon complication that does not outweigh the advantages given by modularity.
authors.affiliation: The Hip Surgery Unit, Institute of Orthopaedics Carlos E. Ottolenghi, Italian Hospital, Buenos Aires, Argentina. cadera@hospitalitaliano.org.ar
authors.forename: M
authors.initials: M
authors.lastname: Buttaro
authors.forename: F
authors.initials: F
authors.lastname: Comba
authors.forename: F
authors.initials: F
authors.lastname: Piccaluga