Fig. 7.

(A) A 62-year-old patient with 42° PI. Initially SS 34° and SFP 75°. (B) Three years after primary right THA, SS increased to 37° and SFP to 79°. Sagittal cup anteversion was 33°. (C) In 2019 she suffered an L3 fracture with loss of lordosis and consequently loss of SS (27°) and SFP 75° (pelvic retroversion), increasing sagittal cup anteversion (44°). (D) Left THA was performed after planning with previous associated pelvic retroversion; different cup anteversion can be found between both THA in the postoperative radiograph.

Note. PI, pelvic incidence; SS, sacral slope; SFP, sacro-femoral pubic angle; THA, total hip replacement.