A series of 14 total hip arthroplasties using the cementless Spotorno expansive acetabular component was performed to treat post traumatic osteoarthrosis that had developed following an acetabular fracture. The mean age of the patients at the time of the arthroplasty was 47 years (range 28-77 years). This study was performed between 1989 to 1999 (11 years), and the mean follow-up was 4 years and 9 months. Clinical results were evaluated by Merle d'Aubigné and Postel scale, which revealed that 78, 50% of the patients presented good and very good results. The radiological evaluation based on DeLee and Charnley criteria demonstrated a radio-lucent-lin in 3 patients. According to the results obtained in the series the authors concluded that the traumatic acetabular osteoarthrosis can be properly handled with the Spotorno acetabular component when arthroplasty is indicated.