Instability

In recent years, total hip arthroplasty (THA) outcomes have improved dramatically and incidence of aseptic loosening has decreased. On the other hand, dislocation is cited as a cause of revision surgery and revision rate by dislocation was reported to be the most common cause at 17.3% in a survey of more than 250,000 revision THAs performed in the United States from 2009 to 2013 [1].