Impact of HoloLens 2–assisted navigation for precision acetabular cup placement on the learning curve of surgeons with different levels of experience

• Mixed reality (HoloLens 2) significantly improves the accuracy of acetabular cup placement compared with freehand technique, reducing variability in both experienced and inexperienced surgeons. • With HoloLens 2 assistance, junior surgeons achieved cup placement accuracy comparable to that of senior surgeons, effectively shortening the learning curve. • The technology provides real-time 3D holographic navigation, enabling precise alignment within the Lewinnek safe zone (abduction 40°±10°, anteversion 15°±10°). • Mixed reality offers a promising tool for surgical training and intraoperative guidance, potentially reducing complications and improving long-term implant survival.