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Table 2 Radiographic parameters at different time points

From: Retrospective study on effectiveness of Activ L total disc replacement

  Pre-op 1 month Post-op 1 year Post-op 3 years Post-op F P
LL 40.21 ± 2.60 37.07 ± 1.82 43.31 ± 2.10 44.41 ± 2.10 5.258 0.003
PI 49.79 ± 7.20 49.59 ± 7.14 50.34 ± 7.67 50.24 ± 7.48 2.161 0.107
PT 16.00 ± 8.30 15.24 ± 7.26 13.86 ± 7.03 14.86 ± 7.91 0.657 0.558
IL 18.66 ± 1.86 23.07 ± 1.07 25.41 ± 1.71 25.93 ± 1.69 19.728 < 0.001
SS 33.79 ± 1.92 34.35 ± 1.78 36.48 ± 1.66 35.38 ± 1.55 1.182 0.320
SL (L2–3) 0.41 ± 0.71 − 0.41 ± 0.66 − 0.21 ± 0.70 0.48 ± 0.67 2.105 0.116
SL (L3–4) 6.48 ± 1.03 5.62 ± 0.97 7.00 ± 1.09 7.41 ± 0.99 2.438 0.083
SL (L4–5) 16.52 ± 1.53 17.86 ± 1.40 20.35 ± 1.32 21.03 ± 1.33 7.768 < 0.001
SL (L5-S1) 19.10 ± 1.49 19.69 ± 1.07 20.79 ± 1.28 21.28 ± 1.23 1.421 0.250
  1. Pre-op pre-operative, Post-op post-operative, LL lumbar lordosis, PI pelvic incidence, PT pelvic tilt, IL index level lordosis, SS sacral slope, SL segmental lordosis