The PL approach was performed in the decubitus position. After dissecting the short external rotators and removing the femoral heads, a cementless acetabular component (Pinnacle; DePuy Synthes, Leeds, UK) and cementless proximally porous-coated femoral component (S-ROM(A); DePuy Synthes, Warsaw, IN, USA) were placed. Femoral head sizes of 32 mm were used for all patients. After placement of the acetabular and femoral components, the short external rotators were recovered using suturing with the greater trochanter. The posterior capsule was also sutured. In all the patients, weight-bearing was allowed on the day after the surgery, as tolerated.

The ALS approach was performed in the supine position, and an image intensifier was used. A cementless acetabular component (Continium; Zimmer Biomet, Warsaw, IN, USA) and cementless proximally porous-coated femoral component (Fitmore; Zimmer Biomet, Winterthur, Switzerland) were placed. The vertical iliofemoral ligament, conjoint tendon, and anterior capsule were preserved. Similar to the PL approach, weight-bearing was tolerated on the day after the surgery.

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