Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2023 Apr 20:19:100199.
doi: 10.1016/j.wnsx.2023.100199. eCollection 2023 Jul.

Finite element analysis of short and long posterior spinal instrumentation and fixation for different pathological thoracolumbar vertebral fractures

Norihiro Nishida  1 , Fei Jiang  2 , Rei Kitazumi  2 , Yuto Yamamura  2 , Takahiro Asano  2 , Rui Tome  2 , Yogesh Kumaran  3 , Hidenori Suzuki  1 , Masahiro Funaba  1 , Junji Ohgi  2 , Xian Chen  2 , Takashi Sakai  1
Affiliations

Finite element analysis of short and long posterior spinal instrumentation and fixation for different pathological thoracolumbar vertebral fractures

Norihiro Nishida et al. World Neurosurg X. .
No abstract available

Keywords: Finite element method; Instrumentation; Posterior fusion; Stress; Vertebral fracture.

PubMed Disclaimer

Figures

Fig. 1
Fig. 1
(A) Each vertebral disc was mapped and (B) a spine model was created (C) from T8 to the sacrum, distinguishing each vertebral body, the anterior longitudinal ligament, intervertebral disc, the posterior longitudinal ligament, and ligamentum flavum.
Fig. 2
Fig. 2
(A) The fracture model was assumed to be at the center of T12, and the wedge-shaped model was used to make a cut at T12 and ALL, and (B) in the screw model, The rod connection of the screw head was removed and a rod with a diameter of 5.5 mm was coupled to the head part (C) to set the screw in each vertebra.
Fig. 3
Fig. 3
Posterior fixation models were constructed for each fracture model: (A) 1 vertebrae above to 1 below (A1B1), (B) 2 vertebrae above to 2 below (A2B2), and (C) 3 vertebrae above to 3 below (A3B3).
Fig. 4
Fig. 4
The caudal surface of L5 was constrained in x, y, and z directions, and beam elements to two anterior points on the cranial surface of T8 and those of both superior articular processes were made. (A) Flexion/neutral/extension. (B) Stress diagram of a screw/rod, and (C) as an example, a stress diagram of a fractured spine and 3A3B.
Fig. 5
Fig. 5
The fracture model. (A) A bar chart of stress on vertebrae and intervertebral discs with flexion. (B) Stress on the respective screws with flexion of 1A1B, 2A2B, and 3A3B. (C) Bar chart of stress on vertebrae and intervertebral discs with extension. (D) Stress on respective screws with extension of 1A1B, 2A2B, and 3A3B. Vertical axis; Stress distribution (Mega Pascal; Mpa), horizontal axis; each vertebral (A, B, including each intervertebral level) level.
Fig. 6
Fig. 6
The osteoporosis fracture model. (A) Bar chart of stress on vertebrae and intervertebral discs with flexion. (B) Stress on the respective screws with flexion of 1A1B, 2A2B, and 3A3B. (C) Bar chart of stress on vertebrae and intervertebral discs at extension. (D) Stress on the respective screws with extension of 1A1B, 2A2B, and 3A3B. Vertical axis; stress distribution (Mpa), horizontal axis; each vertebral (A, B, including each intervertebral level) level.
Fig. 7
Fig. 7
The DISH fracture model. (A) Bar chart of stress on vertebrae and intervertebral discs with flexion. (B) Stress on respective screws with flexion of 1A1B, 2A2B, and 3A3B. (C) Bar chart of stress on vertebrae and intervertebral discs with extension. (D) Stress on respective screws with extension of 1A1B, 2A2B, and 3A3B. Vertical axis; Stress distribution (Mpa), horizontal axis; each vertebral (A, B, including each intervertebral level) level.
Fig. 8
Fig. 8
The DISH-osteoporosis fracture model. (A) Bar chart of stress on vertebrae and intervertebral discs at flexion. (B) Stress of the respective screws with flexion of 1A1B, 2A2B, and 3A3B. (C) Bar chart of stress on vertebrae and intervertebral discs with extension. (D) Stress on respective screws with extension of 1A1B, 2A2B, and 3A3B. Vertical axis; Stress distribution (Mpa), horizontal axis; each vertebral (A, B, including each intervertebral level) level.
See this image and copyright information in PMC

References

    1. Defino H.L.A., Costa H.R.T., Nunes A.A., Nogueira Barbosa M., Romero V. Open versus minimally invasive percutaneous surgery for surgical treatment of thoracolumbar spine fractures- a multicenter randomized controlled trial: study protocol. BMC Muscoskel Disord. Aug 31 2019;20(1):397. doi: 10.1186/s12891-019-2763-1. - DOI - PMC - PubMed
    1. Mallepally A.R., Marathe N., Sangondimath G., Das K., Chhabra H.S. Posterior stabilization without neural decompression in osteoporotic thoracolumbar fractures with dynamic cord compression causing incomplete neurological deficits. Global Spine J. 2020;6 doi: 10.1177/2192568220956954. - DOI - PMC - PubMed
    1. Erichsen C.J., Heyde C.E., Josten C., et al. Percutaneous versus open posterior stabilization in AOSpine type A3 thoracolumbar fractures. BMC Musculoskelet Disord. 2020;21(1):74. doi: 10.1186/s12891-020-3099-6. - DOI - PMC - PubMed
    1. Liao J.C., Chen W.J. Short-segment instrumentation with fractured vertebrae augmentation by screws and bone substitute for thoracolumbar unstable burst fractures. BioMed Res Int. 2019;2019 doi: 10.1155/2019/4780426. - DOI - PMC - PubMed
    1. Pellisé F., Barastegui D., Hernandez-Fernandez A., et al. Viability and long-term survival of short-segment posterior fixation in thoracolumbar burst fractures. Spine J. Aug 1 2015;15(8):1796–1803. doi: 10.1016/j.spinee.2014.03.012. - DOI - PubMed

LinkOut - more resources