Intraprosthetic dislocation is a rare complication in dual mobility hip prostheses, which usually occurs after the third postoperative year due to wear of the polyethylene retentive rim. We report a rare and non-described case of a patient who presented disassembly of the polyethylene insert from his dual mobility socket at nine postoperative months, secondary to several reduction attempts of a posterior dislocation of his prosthesis.
Keywords: Acetabular cup with dual mobility socket; Early intraprosthetic dislocation; Polyethylene disassembly.