Figure 7.
(a) Scatter diagram of postoperative radiographic inclination (RI) and radiographic anteversion (RA). Average target angle in each group and dislocation cases are indicated in other shapes. The Lewinnek safe zone (cup inclination 40° ± 10° and anteversion 15° ± 10°)26 is included for reference. (b) Scatter diagram of the RI and RA errors. Dislocation cases are indicated in another shape. The auxiliary square indicates both RI and RA errors within 5° and 10°.