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[Obturator dislocation--a rare complication of the total hip prosthesis. Case study].

The article presents the case of a 55-year-old patient with an injury of the right leg, which was due to a falling lightly at her buttocks during squatting. Patient was transferred to hospital with complaints of severe pain and limited motion in her right hip. In view of the patient's clinical status and following radiological diagnostic work-up, she was diagnosed with femoral neck fractures, the decision was made to perform a primary total hip arthroplasty (THA) using an lateral approach in the lateral decubitus position. A good clinical and radiological outcome was achieved. Patient after 12 days without complications was released home. After 4 days being home she was transferred to hospital again with complaints of severe pain and limited motion in her operated hip. On admission, her right lower leg was lying in an extremely rotated and abducted position. However, the extremity was neurologically intact with good pedal pulses. Physical examination and an initial anteroposterior radiograph showed obturator dislocation of the hip prosthesis. The decision was made to perform an open reduction. The operative problem in this particular case was removing the head of the prosthesis from the obturator foramen without making any jatrogenic harm.