Effects of Lumbar Lordosis Angle on the Magnitude and Vertebral-Level Distribution of Anterior Cortical Bone Stress in the Lumbar Vertebral Bodies: A Finite Element Analysis.
- 1Cadaver Surgical Training Center, School of Medicine, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan.
- 2Department of Macroscopic Anatomy, Graduate School of Biomedical Sciences, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan.
- 3Department of Health Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki 852-8520, Japan.
Abstract
Lumbar lordosis influences load transmission in the lumbar spine, but its effects on stress in the anterior cortical bone of the vertebral bodies remain unclear. This study investigated how lumbar lordosis angle (LL) affects vertebral stress. A finite element model from T12 to the sacrum was constructed from computed tomography images of a cadaver from a 66-year-old male donor. Three models with identical bone geometry and material properties but LL values of 50°, 30°, and 15° were analyzed under a 300 N compressive load and the same load combined with a 5 N·m flexion moment. Mean von Mises stress and the 95th percentile of von Mises stress were evaluated in the anterior cortical bone of L1-L5, and vertebral-level distributions were normalized to L1. Under both loading conditions, the LL15° model showed higher von Mises stress than the LL50° and LL30° models at all vertebral levels. Adding the flexion moment further increased stress in all models. Normalized stress was lowest at L3 in the LL50° and LL30° models, whereas values in the LL15° model remained relatively close to L1 across L2-L5. These findings suggest that models with lower LL exhibit higher anterior cortical bone stress and altered vertebral-level stress distributions.
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BibTeX
@article{nishi2026effects,
title = {{Effects of Lumbar Lordosis Angle on the Magnitude and Vertebral-Level Distribution of Anterior Cortical Bone Stress in the Lumbar Vertebral Bodies: A Finite Element Analysis.}},
author = {Keita Nishi and Daisuke Endo and Takashi Hasegawa and Shinichi Matsumoto and Masaru Itose and Madoka Makino and Kazunobu Saiki and Toshiyuki Tsurumoto and Keiko Ogami-Takamura},
journal = {Bioengineering (Basel, Switzerland)},
year = {2026},
month = sep,
doi = {10.3390/bioengineering13101116},
url = {https://europepmc.org/article/MED/42938971},
note = {CC BY},
}
RIS
TY - JOUR
TI - Effects of Lumbar Lordosis Angle on the Magnitude and Vertebral-Level Distribution of Anterior Cortical Bone Stress in the Lumbar Vertebral Bodies: A Finite Element Analysis.
AU - Keita Nishi
AU - Daisuke Endo
AU - Takashi Hasegawa
AU - Shinichi Matsumoto
AU - Masaru Itose
AU - Madoka Makino
AU - Kazunobu Saiki
AU - Toshiyuki Tsurumoto
AU - Keiko Ogami-Takamura
PY - 2026
DA - 2026/09/24
JO - Bioengineering (Basel, Switzerland)
DO - 10.3390/bioengineering13101116
UR - https://europepmc.org/article/MED/42938971
AB - Lumbar lordosis influences load transmission in the lumbar spine, but its effects on stress in the anterior cortical bone of the vertebral bodies remain unclear. This study investigated how lumbar lordosis angle (LL) affects vertebral stress. A finite element model from T12 to the sacrum was constructed from computed tomography images of a cadaver from a 66-year-old male donor. Three models with identical bone geometry and material properties but LL values of 50°, 30°, and 15° were analyzed under a 300 N compressive load and the same load combined with a 5 N·m flexion moment. Mean von Mises stress and the 95th percentile of von Mises stress were evaluated in the anterior cortical bone of L1-L5, and vertebral-level distributions were normalized to L1. Under both loading conditions, the LL15° model showed higher von Mises stress than the LL50° and LL30° models at all vertebral levels. Adding the flexion moment further increased stress in all models. Normalized stress was lowest at L3 in the LL50° and LL30° models, whereas values in the LL15° model remained relatively close to L1 across L2-L5. These findings suggest that models with lower LL exhibit higher anterior cortical bone stress and altered vertebral-level stress distributions.
SN - 2306-5354
ER -