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Acta ortopédica mexicana

versión impresa ISSN 2306-4102


TORRES-PEREZ, A; FERNANDEZ-FAIREN, M; MURCIA-MAZON, A  y  MERONO, A. Results of the latest generation dual-mobility cup in spain (135 THAs followed-up for a mean of 32 months). Acta ortop. mex [online]. 2014, vol.28, n.5, pp.277-286. ISSN 2306-4102.

Introduction: This multi-center study (Cabueñes Hospital and Santa Lucía University Hospital) assessed the results of a retrospective and ongoing series of 135 total hip arthroplasties (THA) in which a latest generation dual-mobility cup was implanted. Material and methods: A total of 135 THAs performed between 2005 and 2008 were analyzed. Mean follow-up was 32 months. The causes of surgery were: coxarthrosis in 31.8% and hip fracture in 68.1%. Mean age was 82.1 years. All patients were seen at regular follow-up visits for clinical and radiological assessments. Results: The follow-up lasted over 24 months in 121 THAs (14 patients died). In the most recent follow-up, in May 2011, 119 cups did not show any loosening. Complications were as follows: 2 postoperative dislocations; 4 DVTs; 3 infections; 5 periprosthetic fractures; 2 loosened cups, and one subsided stem. The mean preoperative Harris Hip Score (HHS) was 45, 83; the mean postoperative HHS was 80, 03. Only two of the 135 cups analyzed had radiographic modifications without clinical signs. Isolated cup survival at 12 months was 97.03% (87.3-99.2) with a 95% confidence interval; survival at 5 years was 96.7% (85.4-98.8). Discussion: In our study, the new dual-mobility cup showed good results for the following indications: primary coxarthrosis and femur neck fractures. Conclusion: The complication rate in our series was similar to the one reported in other series in the literature, except for dislocation. The latter was considerably less frequent (1.48%) in our series compared to the rates reported by the classical series, especially in patients with neuromuscular or cognitive problems (one third of patients).

Palabras llave : hip; prosthesis; postoperative complications.

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