CORR Insights^®: Low Frequency of Early Complications With Dual-mobility Acetabular Cups in Cementless Primary THA

Excerpt

Although dual-mobility sockets have been around for more than 40 years, there are no long-term followup studies on these devices currently available. We do have medium-term followup studies, which showed that dual-mobility cups reduced the risk of dislocation [5]. However, as Chughtai et al. appropriately note, these devices have been associated in some reports with a serious complication, called intraprosthetic dislocation. Although the authors did not observe any intraprosthetic dislocations in this series, they correctly state that many other studies have indeed reported this complication. Intraprosthetic dislocation typically results in further revision surgery, and—as the authors also correctly note—can cause other problems like intraarticular metallosis. This complication has been reported to occur in as many as 5% of hips treated with dual-mobility sockets [3]. …