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. 2021 Dec 20;16:730. doi: 10.1186/s13018-021-02876-7

Fig. 2.

Fig. 2

Preoperative measurements: Both sides: Femoral offset (FO), acetabular offset (AO), vertical position of the center of rotation (COR), leg length difference (LLD); affected hip: centrum–collum–diaphyseal angle (CCD angle), cortical index (CI), canal flare index, canal-to-calcar ratio