Cementation of a dual mobility cup in a wellfxed acetabular component- a reliable option in revision total hip arthroplasty?

The “cup-in-cup” technique allows for revision of failed total hip arthroplasty (THA) when the cement‑ less cup is well fixed. Furthermore, it can be used for liner wear or mechanical failure where liner replacement may be impossible or impractical. Recently, the “cup-in-cup” technique in combination with dual mobility cups (DMC) has drawn increased attention.