Effect of Osteoporosis on Vibration Characteristics of the Fused Lumbar Spine

doi:10.12068/j.issn.1005-3026.2025.20239070

Abstract

Abstract:

Based on the finite element method， the effect of osteoporosis on lumbar fusion surgery under vibration conditions was explained from a clinical perspective using such indicators as stress， segmental lordosis angle， and intervertebral disc height. It was found that when the human body is exposed to a vibrating environment， the segments undergoing lumbar fusion surgery may cause other vertebral segments to become unstable. This instability significantly increases the risk of other segments developing diseases， failure of the fusion device， failure of the fixation device， and reduced lumbar stability. From the perspective of the effectiveness of lumbar fusion surgery， osteoporosis leads to bone cells in the fusion segments being exposed to a more adverse vibrational growth environment， resulting in poorer fusion outcomes.

Key words: complication, fusion outcome, lumbar interbody fusion surgery, osteoporosis, vibration

CLC Number:

R 681.5

Qing-dong WANG, Yu ZHANG, Yong-jian LI, Li-xin GUO. Effect of Osteoporosis on Vibration Characteristics of the Fused Lumbar Spine[J]. Journal of Northeastern University(Natural Science), 2025, 46(5): 95-102.

Figures/Tables 8

Fig.1 TLIF finite element models

Table 1 Material properties of the models

结构	单元类型	弹性模量/MPa	泊松比	密度/(mg·mm^-3）
松质骨	C3D4	健康:100;骨质疏松:34(减少66%)	0.2	健康：1.1;骨质疏松：0.37(减少66%)
皮质骨	C3D8	健康:12 000;骨质疏松:8 040(减少33%)	0.3	健康：1.7;骨质疏松：1.14(减少66%)

Fig.2 Boundary and load conditions

Fig.3 Dynamic characteristics at the adjacent segments in the models

Fig.4 Dynamic response of the stress at the fused segments in the models

Fig.5 Dynamic response of the maximum of the cage and bilateral pedicle screw fixator

Fig.6 Dynamic response of disk height and segmental lordosis at L4-L5 fused segments in the models

Fig.7 Dynamic response of the compressive stress at the interface between cages and end plates in the models

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