Variety of femoral anteversion and its measurement in cementless total hip arthroplasty: Does robotic technology improve accuracy?

Table 4 Anteversion of different measurements and correlations with postoperative CT-measured stem anteversion

N = 64	Anteversion (Mean ± SD, range)	Postoperative CT-measured stem anteversion	r* (P value)	Intraclass correlation coefficient (P value)
Preoperative Mako-measured native femoral anteversion	14.64° ± 15.782° (− 32° to 50°)	18.37° ± 8.20° (3° to 38°)	0.459 (< 0.001)	0.546 (0.001)
Intraoperative surgeon estimated femoral stem anteversion	14.69° ± 6.41° (0° to 30°)		0.281 (0.025)	0.428 (0.014)
Intraoperative goniometer-measured femoral anteversion^**	20.03° ± 7.96° (5° to 42°)		0.435 (< 0.001)	0.606 (< 0.001)
Intraoperative Mako-measured femoral stem anteversion	14.31° ± 7.87° (− 8° to 35°)		0.806 (< 0.001)	0.892 (< 0.001)

*Correlations between stem antevesion measured by postoperative CT and anteversion measured by other four methods. **Measurement of stem anteversion with goniometer after prosthesis implanted

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