Level IV (retrospective study).

This study confirmed the interest of dual mobility in preventing prosthetic hip dislocation. Intraprosthetic dislocation is a complication that seems to have been resolved in the mid-term follow-up.

The adductor tubercle appeared to be a better landmark than the MFE for the femoral tunnel positioning during surgical reconstructions of the MPFL because it was easier to identify and its relationship with the femoral insertion of the MPFL was constant (10 mm below).

III case-control study.

No abstract

III, retrospective case-control study.

IV, prospective therapeutic study.

This study provided evidence of the advantages of dual mobility cups in all revision THA indications.