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Table 5 Radiological outcomes: directly after surgery, at 1-year and 2-year FU (* = significant)

From: Clinical experiences with a PEEK-based dynamic instrumentation device in lumbar spinal surgery: 2 years and no more

 

Preoperatively

Directly after surgery

1-year FU

2-year FU

Lumbar lordosis (°)

− 48.4 ± − 13.0 (range − 25.0 to − 77.0)

− 48.0 ± − 9.9 (range − 27.0 to − 73.0) P = 0.886

− 50.6 ± − 11.2 (range − 27.0 to − 73.0) P = 0.562

− 49.6 ± − 10.4 (range − 30.0 to − 65.0) P = 0.835

Pelvic incidence (°)

63.8 ± 11.8 (range 38.0–85.0)

61.5 ± 9.9 (range 38.0–85.0) P = 0.141

63.4 ± 7.5 (range 51.0–72.0) P = 0.332

63.3 ± 9.5 (range 40.0–76.0) P = 0.681

Pelvic tilt (°)

26.8 ± 8.7 (range 10.0–40.0)

26.8 ± 8.7 (range 10.0–40.0) P = 0.561

24.8 ± 6.6 (range 9.0–34.0) P = 0.018*

23.2 ± 5.9 (range 10.0–35.0) P = 0.027*

Sacral slope (°)

37.3 ± 9.6 (range 20.0–56.0)

37.3 ± 9.6 (range 20.0–56.0) P = 0.329

38.8 ± 6.3 (range 30.0–52.0) P = 0.244

40.4 ± 9.7 (range 23.0–58.0) P = 0.060

Sagittal segmental endplate angle of the instrumentation (°)

− 30.3 ± − 10.3 (range − 7.0 to − 50.0)

− 31.3 ± − 5.2 (range − 20.0 to − 40.0) P = 0.949

− 31.1 ± − 7.6 (range − 15.0 to − 46.0) P = 0.609

− 31.1 ± − 7.0 (range − 12.0 to − 43.0) P = 0.622

Sagittal segmental endplate angle of the dynamic segment (°)

− 18.6 ± − 6.8 (range −6.0 to − 35.0)

− 16.4 ± − 5.0 (range − 9.0 to − 30.0) P = 0.063

16.5 ± − 6.0 (range − 7.0 to − 30.0) P = 0.170

− 16.1 ± − 5.5 (range − 10.0 to − 28.0) P = 0.044*