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Table 2 Radiographic results following ceramic-on-ceramic THA

From: Fourth-generation ceramic-on-ceramic THA results in improvements in midterm outcomes compared to third-generation THA but does not resolve noise problems: a cohort study of a single-hip system

Parameters Forte COC (n = 310) Delta COC (n = 292) p value
Acetabular component orientationa (°)
 Abduction angle 41.8 (25–57) 42.1 (28–58) 0.522
 Anteversion angle 15.8 (4–36) 16.2 (4–37) 0.464
Femoral component positionb 0.669
 Neutral 302 (97) 286 (98)
 Varus 8 (3) 6 (2)
 Valgus 0 (0) 0 (0)
COR positiona (mm)
 Vertical 16.9 (9.4–23.7) 16.8 (9.2–24.0) 0.733
 Horizontal 27.7 (20.6–35.3) 27.5 (20.1–35.2) 0.681
Femoral offseta (mm) 39.3 (32.8–49.5) 39.7 (33.0–49.8) 0.541
Hip offseta (mm) 67.0 (53.5–79.6) 67.2 (54.9–79.9) 0.839
Leg-length discrepancya (mm)* 2.6 (0–9.8) 2.5 (0.1–11.2) 0.677
  1. a The values are given as the average, with the range in parentheses
  2. b The values are given as the number of hips, with the percentage in parentheses
  3. * Absolute values of leg-length discrepancy were obtained
  4. THA total hip arthroplasty, COC ceramic-on-ceramic, COR center of rotation