Effect of lateral bending position on displacement and intra-stress of cervical disc with cervical rotatory manipulation in three-dimensional element analysis
HUANG Xuecheng
YE Linqiang
JIANG Xiaobing
WANG Qianli
YU Weibo
LIANG De
Abstract：Objective To simulate the cervical rotatory manipulation(CRM)in left/right lateral bending position by using the three-dimensional finite element,so as to investigate the effect of lateral bending position on the displacement and intra-stress of cervical disc when performing CRM.Methods With Mimics10.01,Geomagic Studio,and Solidworks 14.0 software,a three-dimensional finite element model of C 5-6 was developed from the CT scan images of a 25-year-old normal adult female.The model was imported into Ansys Workbench 14.5 to verify and simulate the CRM.The CRM was decom-posed by principium of manipulation in left/right lateral flexion and rotated to the right side.The parameter of mechanics was analyzed with the finite element system.The change of displacement and intra-stress distribution in cervical disc simul-taneously were displayed during simulating the manipulation.Results In left/right lateral bending position and rotated to the right side,the posterior part of the left side of cervical disc was all retracted.And the displacement was toward anteri-or,left lateral flexion(0.93 mm)was smaller than the right lateral flexion(1.12 mm).The intra-stress of cervical disc were focused on the posterior part of the right side and the left side in left /right lateral flexion,respectively,and the maxi-mum stress of left lateral bending(7.00 MPa)was smaller than that of the right lateral bending(8.19 MPa). Conclusion When the cervical vertebra is in the left lateral bending position and rotates to the right side, the effects on the displacement and intra-stress are smaller than that of the right lateral bending position.Therefore,the left lateral ben-ding position is more likely to protect the left side of cervical disc.When we treat cervical spondylotic radiculopathy with CRM,should let the patients rotate to the contralateral side with lateral flexion to the ipsilateral side.In this way,it can al-leviate the symptom,and reduce the risk of secondary injury to the cervical disc of ipsilateral side at the same time.
Keywords：cervical spondylotic radiculopathyrotatory manipulationpositiondisplacementstressthree-dimen-sional element analysis
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 5-8 )