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. 2023 Jul 27:11:1195583.
doi: 10.3389/fbioe.2023.1195583. eCollection 2023.

Comparison of biomechanical parameters of two Chinese cervical spine rotation manipulations based on motion capture and finite element analysis

Dongxin Lin  1 , Zaopeng He  2   3   4 , Rui Weng  5   6 , Yuhua Zhu  7 , Zhiwei Lin  8   9 , Yuping Deng  10   11 , Yang Yang  1 , Jinchuan Tan  1 , Mian Wang  1 , Yanbin Li  1 , Gang Huang  10 , Guanghao Yu  12 , Daozhang Cai  2   3   13 , Xuecheng Huang  14 , Wenhua Huang  1
Affiliations

Comparison of biomechanical parameters of two Chinese cervical spine rotation manipulations based on motion capture and finite element analysis

Dongxin Lin et al. Front Bioeng Biotechnol. .

Abstract

Objective: The purpose of this study was to obtain the stress-strain of the cervical spine structure during the simulated manipulation of the oblique pulling manipulation and the cervical rotation-traction manipulation in order to compare the mechanical mechanism of the two manipulations. Methods: A motion capture system was used to record the key kinematic parameters of operating the two manipulations. At the same time, a three-dimensional finite element model of the C0-T1 full healthy cervical spine was established, and the key kinematic parameters were loaded onto the finite element model in steps to analyze and simulate the detailed process of the operation of the two manipulations. Results: A detailed finite element model of the whole cervical spine including spinal nerve roots was established, and the validity of this 3D finite element model was verified. During the stepwise simulation of the two cervical spine rotation manipulations to the right, the disc (including the annulus fibrosus and nucleus pulposus) and facet joints stresses and displacements were greater in the oblique pulling manipulation group than in the cervical rotation-traction manipulation group, while the spinal cord and nerve root stresses were greater in the cervical rotation-traction manipulation group than in the oblique pulling manipulation group. The spinal cord and nerve root stresses in the cervical rotation-traction manipulation group were mainly concentrated in the C4/5 and C5/6 segments. Conclusion: The oblique pulling manipulation may be more appropriate for the treatment of cervical spondylotic radiculopathy, while cervical rotation-traction manipulation is more appropriate for the treatment of cervical spondylosis of cervical type. Clinicians should select cervical rotation manipulations for different types of cervical spondylosis according to the patient's symptoms and needs.

Keywords: biomechanics; cervical rotation manipulation; cervical rotation-traction manipulation; finite element analysis; motion capture; oblique pulling manipulation.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

FIGURE 1
FIGURE 1
Mechanical parameters of the cervical rotation manipulation obtained with motion capture monitoring.
FIGURE 2
FIGURE 2
Full cervical spine finite element model, including detailed structures of the intervertebral discs, facet joints, spinal cord and nerve roots.
FIGURE 3
FIGURE 3
Validation of the Full cervical spine finite element model. (A) Flexion-Extension range of motion. (B) Lateral bending range of motion. (C) Axail rotation range of motion. (D) Mesh convergence test.
FIGURE 4
FIGURE 4
Boundary condition loading diagram for two manipulations. (A) The cervical rotation-traction manipulation. (B) The oblique pulling manipulation.
FIGURE 5
FIGURE 5
Stress-strain statistics of each structure. (A) Von-Mises Stress of the annular fibrosus. (B) Von-Mises Stress of the nucleus pulposus. (C) Von-Mises Stress of the left nerve foot. (D) Von-Mises Stress of the right nerve foot. (E) Von-Mises Stress of the intervertebral disc. (F) Displacement of the intervertebral disc. (G) Von-Mises Stress of the facet joint.
FIGURE 6
FIGURE 6
Stress-strain patterns of the intervertebral disc and facet joints under two manipulation simulations. (A) The von-mises stress of the annular fibrosus in the cervical rotation-traction manipulation. (B) The von-mises stress of the annular fibrosus in the oblique pulling manipulation. (C) The von-mises stress of the nucleus pulposus in the cervical rotation-traction manipulation. (D) The von-mises stress of the nucleus pulposus in the oblique pulling manipulation. (E) The von-mises stress of the intervertebral disc in the cervical rotation-traction manipulation. (F) The von-mises stress of the intervertebral disc in the oblique pulling manipulation. (G) The von-mises Stress of the facet joint in the cervical rotation-traction manipulation. (H) The von-mises stress of the facet joint in the oblique pulling manipulation.
FIGURE 7
FIGURE 7
Stress-strain patterns of the spinal cord and nerve roots under two manipulation simulations. (A) The von-mises stress of the nerve roots in the cervical rotation-traction manipulation. (B) The von-mises stress of the nerve roots in the oblique pulling manipulation. (C) The von-mises stress of the spinal cord in the cervical rotation-traction manipulation. (D) The von-mises stress of the spinal cord in the oblique pulling manipulation.
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