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. 2021 Oct 11;142(10):2979–2989. doi: 10.1007/s00402-021-04196-1

Fig. 3.

Fig. 3

Acetabular cup position in standing and sitting position depicting a patient with spinopelvic hypermobility (A, B) with standing/sitting PT 11.1°/46.8° resulting in ∆PT 35.7°, AI standing/sitting 20.1°/62.3°. C, D depicting a patient with spinopelvic stiffness with standing/sitting PT 11.5°/20.8° resulting in ∆PT 9.3°, AI standing/sitting 34.8°/41.2°. Anteinclination (AI), representing as a general combined parameter cup anteversion and inclination, is increased in the patient with spinopelvic hypermobility (AI 62.3°) (B) compared to the patient with spinopelvic stiffness (AI 41.2°) (D) in sitting position resulting in a more vertical cup position in the hypermobile patient (B) and a more horizontal cup position in the stiff patient (D)