The Use of a Cemented Dual Mobility Socket to Treat Recurrent Dislocation: A Prospective Evaluation

Methods: A prospective series included 51 patients (39 females, 12 males) with a mean age of 71.3 ± 11.5 years presenting with recurrent dislocation (mean 3.3 ± 1.4). The mean number of previous THA was 1.8 ± 1.1 (1-6). A single cup design was used (Medial cup, Aston Medical, France) consisting of a stainless steel outer shell with grooves with a highly polished inner surface articulating with a mobile intermediate polyethylene component with an opening diameter smaller than the 22.2 mm femoral head. No locking ring or other means of constraint was used.