20.500.12556/DiRROS-29932 Correlation between sagittal balance and thoracolumbar elastic energy parameters in 42 spines subject to spondylolisthesis or spinal stenosis and 21 normal spines The curvature of the lumbar spine plays a critical role in maintaining spinal function, stability, weight distribution, and load transfer. We have developed a mathematical model of the lumbar spine curve by introducing a novel mechanism: minimization of the elastic bending energy of the spine with respect to two biomechanical parameters: dimensionless lumbosacral spinal curvature ▫$c_{LS}$▫ and dimensionless curvature increment along the spine CI. While most of the biomechanical studies focus on a particular segment of the spine, the distinction of the presented model is that it describes the shape of the thoracolumbar spine by considering it as a whole (non-locally) and thus includes interactions between the different spinal levels in a holistic approach. From radiographs, we have assessed standard geometrical parameters: lumbar lordosis LL, pelvic incidence PI, pelvic tilt PT, sacral slope ▫$\psi_0$▫ and sagittal balance parameter SB = sagittal vertical axis (SVA)/sacrumbicoxofemoral distance (SFD) of 42 patients with lumbar spinal stenosis (SS) or degenerative spondylolisthesis (SL) and 21 radiologically normal subjects. SB statistically significantly correlated with model parameters ▫$c_{L5}$▫ (r = − 0.34, p = 0.009) and − CI (r = 0.33, p = 0.012) but not with standard geometrical parameters. A statistically significant difference with sufficient statistical power between the patients and the normal groups was obtained for ▫$c_{LS}$▫ , CI, and SB but not for standard geometrical parameters. The model provides a possibility to predict changes in the thoracolumbar spine shape in surgery planning and in assessment of different spine pathologies. lumbar lordosis thoracolumbar spine elastic energy sagittal balance spine curvature ledvena lordoza torakolumbalna hrbtenica elastična energija sagitalno ravnotežje ukrivljenost hrbtenice true false true Angleški jezik Slovenski jezik Neznano 2026-06-09 13:09:03 2026-06-09 13:09:04 2026-06-10 03:48:58 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Opis vira z dne 4. 10. 2024; 15 str. iss. 19, [article no.] e38469 Vol. 10 Okt. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 577:611 2405-8440 10.1016/j.heliyon.2024.e38469 210330883 RAZ_Bracun_Spela_2024.pdf RAZ_Bracun_Spela_2024.pdf 1 A6E4E4A01446872DC0FCFA821F87F816 d37cddd8fa5a0f7d87c25c20a2342debac27dcbf6cd37dcc8d1adc1fdb354eae c8e9a355-63f3-11f1-9215-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=45075 https://www.sciencedirect.com/science/article/pii/S2405844024145008 1 a142ee15-63f3-11f1-9215-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=45074 Univerzitetni klinični center Ljubljana 0 0 0