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Comparison of native and stem version (a). The angle of stem version was significantly larger than the native version with a mean difference (Sv–Nv) of 9.0 ± 8.8° (p < 0.001). The bar line shows standard deviation. Distribution of the version discrepancy (Sv–Nv) (b). The discrepancy between native and stem version was calculated as the value subtracting the native version from the stem version
