Radiographic parameters following sequential ALL release (mean ± SD).
| Construct | Radiographic Parameters, mean ± SD | ||||
| IVA (°) | ADH (mm) | PDH (mm) | FH (mm) | FA (mm2) | |
| Intact | 5.3 ± 2.8 | 13.6 ± 3.0 | 7.0 ± 0.9 | 19.6 ± 3.2 | 118.1 ± 42.0 |
| ATP-LIF | 6.1 ± 2.3 | 16.2 ± 1.8 | 9.3 ± 1.6 | 21.7 ± 2.4 | 135.4 ± 37.5 |
| 1/3 ALL release | 7.6 ± 2.3 | 17.6 ± 1.8 | 9.9 ± 1.4 | 22.4 ± 1.7 | 139.9 ± 38.7 |
| 2/3 ALL release | 10.3 ± 3.4 | 19.5 ± 2.4 | 10.3 ± 1.7 | 22.7 ± 1.8 | 139.7 ± 38.3 |
| 3/3 ALL release | 14.1 ± 3.7 | 22.5 ± 3.2 | 10.7 ± 1.6 | 23.0 ± 1.8 | 141.5 ± 39.6 |
Abbreviations: ADH, anterior disc height; ALL, anterior longitudinal ligament; ATP-LIF, anterior-to-psoas lumbar interbody fusion; FA, foraminal area; FH, foraminal height; IVA, intervertebral angle; PDH, posterior disc height.