In this retrospective analysis of 108 hips using dynamic three-dimensional-to-two-dimensional modeling after total hip arthroplasty, spinopelvic abnormalities significantly altered optimal acetabular cup anteversion and its safe range. Flatback deformity was associated with a lower target anteversion, while stiff spinopelvic mobility narrowed the acceptable range, supporting patient-specific component positioning.

Source: JB & JS Open Access