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Table 2
Average anteversion and inclination angles of each group.
Variables | rTHA |
cTHA |
t (p-value) |
---|---|---|---|
Mean ± SD | Mean ± SD | ||
Preoperative period | |||
Anteversion | 19.4 ± 1.5° | 17.6 ± 6.4° | 1.8 (0.08) |
Inclination | 40.0 ± 0.3° | 43.1 ± 5.1° | −4.0 (<0.001) |
Robot-assisted intraoperative period | |||
Anteversion | 19.9 ± 2.8° | ||
Inclination | 40.2 ± 2.7° | ||
Postoperative period | |||
Sagittal version | 24.8 ± 6.4° | 27.5 ± 11.9° | −1.34 (0.17) |
Anteversion | 28.7 ± 7.0° | 31.1 ± 8.3° | −1.69 (0.10) |
Inclination | 40.7 ± 4.0° | 41.3 ± 7.1° | −0.52 (0.61) |
p-value Preop vs. post-op measure (inclination) | 0.07 | 0.12 | |
p-value Preop vs. intra-op measure (inclination) | 0.54 | ||
p-value Preop vs. post-op measure (anteversion) | <0.001 | <0.001 | |
p-value Preop vs. intra-op measure (anteversion) | 0.43 | ||
Absolute difference | |||
Postoperative CT – preoperative anteversion | 9.3 ± 7.1° | 13.5 ± 11.7° | −2.22 (0.03) |
Postoperative CT – preoperative inclination | 0.7 ± 4.0° | −1.8 ± 7.4° | 2.11 (0.04) |
SD = Standard deviation; rTHA = robotic-assisted total hip arthroplasty; cTHA = conventional total hip arthroplasty; CT = computerised tomography scan of the hip; Preop = preoperative post-op = postoperative; intra-op =intra-operative measurement.
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