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Neurospine > Volume 21(3); 2024 > Article |
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Values are presented as mean±standard deviation or number (%).
Group A, regular-sized 3-dimensionally (3D)-printed titanium cages; group B, regular-sized polyetheretherketone cages; group C, large-sized 3D-printed titanium cages; BMI, body mass index; BMD, bone mineral density.
Analysis of variance was used to compare demographic data among the 3 groups.
Values are presented as mean±standard deviation.
Group A, regular-sized 3-dimensionally (3D)-printed titanium cages; group B, regular-sized polyetheretherketone cages; group C, large-sized 3D-printed titanium cages; preop, preoperative; postop, postoperative; △, difference between 2 values.
Repeated-measures analysis of variance was used to compare radiographic parameters among the 3 groups.
Variable | Group A (n = 31) | Group B (n = 31) | p-value | Group B (n = 31) | Group C (n = 24) | p-value | Group A (n = 31) | Group C (n = 24) | p-value |
---|---|---|---|---|---|---|---|---|---|
Fusion rate (%)† | 90.4 | 87.1 | 0.688 | 87.1 | 91.7 | 0.590 | 90.4 | 91.7 | 0.863 |
Fusion grade | 0.548 | 0.802 | 0.310 | ||||||
Grade I | 10 (32.3) | 12 (38.7) | 12 (38.7) | 10 (41.7) | 10 (32.3) | 10 (41.7) | |||
Grade II | 18 (58.1) | 15 (48.4) | 15 (48.4) | 12 (50.0) | 18 (58.1) | 12 (50.0) | |||
Grade III | 2 (6.5) | 4 (12.9) | 4 (12.9) | 2 (8.3) | 2 (6.5) | 2 (8.3) | |||
Grade IV | 1 (3.2) | 0 (0) | 0 (0) | 0 (0) | 1 (3.2) | 0 (0) | |||
Cage subsidence (%) | 13 (41.9) | 8 (25.8) | 0.194 | 8 (25.8) | 4 (16.7) | 0.416 | 13 (41.9) | 4 (16.7) | 0.044* |
Severity of subsidence (mm) | 2.20 ± 1.84 | 1.79 ± 1.47 | 0.071 | 1.79 ± 1.47 | 0.93 ± 0.83 | 0.048* | 2.20 ± 1.84 | 0.93 ± 0.83 | 0.004* |
† Bridwell interbody fusion grading system: grade 1 is defined as fusion with remodeling and trabeculae present; grade 2 is defined as an intact graft with incomplete remodeling and no lucency present; grade 3 is defined as an intact graft with potential lucency at the cranial or caudal end; and grade 4 is defined as absent fusion with collapse/resorption of the graft. The fusion rate, fusion grade, and cage subsidence rate were compared using the chi-square test.
Technique of Biportal Endoscopic Transforaminal Lumbar Interbody Fusion2020 July;17(Suppl 1)