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Neurospine > Volume 19(3); 2022 > Article |
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Variable | 3D-printed titanium (n = 40) | PEEK (n = 43) | p-value |
---|---|---|---|
Sex | 0.739 | ||
Male | 21 (52.5) | 21 (48.8) | |
Female | 19 (47.5) | 22 (51.2) | |
Age (yr) | 59.17 ± 11.70 | 58.53 ± 12.46 | 0.810 |
Specific fusion level | |||
L3/4 | 4 (10.0) | 6 (14.0) | 0.740 |
L4/5 | 28 (70.0) | 30 (69.8) | 0.982 |
L5/S1 | 8 (20.0) | 7 (16.3) | 0.778 |
Diagnosis | |||
Spinal stenosis | 17 (42.5) | 16 (37.2) | 0.659 |
Spondylolisthesis/instability | 19 (47.5) | 25 (58.1) | 0.383 |
Recurrent herniated disc | 4 (10.0) | 2 (4.7) | 0.422 |
BMD (T-score) | -1.62 ± 1.08 | -1.49 ± 0.81 | 0.748 |
BMI (kg/m2) | 25.22 ± 3.52 | 24.52 ± 2.78 | 0.444 |
Clinical results | |||
Preop ODI (%) | 50.80 ± 24.64 | 45.58 ± 13.31 | 0.522 |
Postop ODI (%) | 38.42 ± 14.36 | 36.96 ± 9.77 | 0.684 |
Preop VAS (back pain) | 4.4 ± 1.46 | 2.02 ± 0.91 | 0.476 |
Postop VAS (back pain) | 2.02 ± 0.91 | 2.30 ± 1.16 | 0.235 |
Preop VAS (leg pain) | 6.27 ± 1.86 | 6.05 ± 2.83 | 0.942 |
Postop VAS (leg pain) | 2.92 ± 2.22 | 3.00 ± 1.88 | 0.826 |
Complication | 0 | 1* |
Values are presented as number (%) or mean±standard deviation.
3D, 3-dimensional; PEEK, polyetheretherketone; BMD, bone mineral density; BMI, body mass index; ODI, Oswestry Disability Index; VAS, visual analogue scale.
Chi-square test, Student t-test, and Mann-Whitney U-test were used for statistical analysis.
Variable | 3D-printed titanium (n = 40) | PEEK (n = 43) | p-value |
---|---|---|---|
Fusion Grade (Bridwell fusion grade) at 6-month follow-up | |||
Grade I | 15 (37.5) | 7 (16.3) | 0.029* |
Grade II | 18 (45.0) | 27 (62.8) | 0.104 |
Grade III | 7 (17.5) | 9 (20.9) | 0.692 |
Grade IV | 0 (0) | 0 (0) | - |
Fusion rate (grade I+grade II) | 33 (82.5) | 34 (79.1) | 0.692 |
Fusion grade (Bridwell fusion grade) at 1-year follow-up | |||
Grade I | 31 (77.5) | 22 (51.2) | 0.013* |
Grade II | 7 (17.5) | 18 (41.9) | 0.016* |
Grade III | 2 (5.0) | 3 (7.0) | 0.705 |
Grade IV | 0 (0) | 0 (0) | - |
Fusion rate (grade I+grade II) | 38 (95.0) | 42 (93.0) | 0.705 |
Segmental vertebral body height | |||
Preoperative (mm) | 69.88 ± 6.56 | 72.53 ± 9.58 | 0.180 |
Immediate operative (mm) | 73.76 ± 6.04 | 75.03 ± 9.62 | 0.813 |
Last follow-up (mm) | 69.68 ± 5.84 | 71.33 ± 8.97 | 0.325 |
Gap of segmental vertebral body height (mm)† | 4.07 ± 3.46 | 3.56 ± 3.34 | 0.520 |
Subsidence‡ | 15 (37.5) | 18 (41.9) | 0.685 |
Variable | 3D-printed titanium (n = 28) | PEEK (n = 30) | p-value |
---|---|---|---|
Fusion grade (Bridwell fusion grade) at 6-month follow-up | |||
Grade I | 10 (35.7) | 4 (13.3) | 0.045* |
Grade II | 13 (46.4) | 19 (63.3) | 0.152 |
Grade III | 5 (17.9) | 7 (23.3) | 0.462 |
Grade IV | 0 (0) | 0 (0) | |
Fusion rate (grade I+grade II) | 23 (82.1) | 23 (76.7) | 0.462 |
Fusion grade (Bridwell fusion grade) at 1-year follow-up | |||
Grade I | 22 (78.6) | 16 (53.3) | 0.04* |
Grade II | 5 (17.9) | 13 (43.3) | 0.034* |
Grade III | 1 (3.6) | 1 (3.3) | 0.737 |
Grade IV | 0 (0) | 0 (0) | |
Fusion rate (grade I+grade II) | 27 (96.4) | 29 (96.7) | 0.737 |
Segmental vertebral body height | |||
Preoperative (mm) | 69.57 ± 6.91 | 73.11 ± 10.45 | 0.137 |
Immediate operative (mm) | 74.13 ± 5.99 | 76.32 ± 10.39 | 0.334 |
Last follow-up (mm) | 70.13 ± 6.11 | 72.45 ± 9.68 | 0.285 |
Gap of segmental vertebral body height (mm)† | 4.38 ± 4.76 | 3.11 ± 2.94 | 0.224 |
Subsidence‡ | 10 (35.7) | 13 (43.3) | 0.373 |