20.500.12556/RUL-163380 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 Članek v reviji 2024-10-04 14:34:52 2024-10-04 14:34:56 2024-10-09 03:48:30 0000-00-00 00:00:00 2024 0 0 15 str. iss. 19, arti.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 1-s2.0-S2405844024145008-main.pdf 1-s2.0-S2405844024145008-main.pdf 1 9AC8A3247E9811AFDF6F0DAE75B19655 fbde1e8fef2e89a7784961ef677fa8f4e463d7795392d8ccc58258bb993c6834 5b4cdeb1-824d-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=192986 https://www.sciencedirect.com/science/article/pii/S2405844024145008 1 e7d76baa-824c-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=192985 Fakulteta za elektrotehniko Medicinska fakulteta Zdravstvena fakulteta 0 0 0