[Study on the method of construct the three-dimensional finite element model of cervical vertebrae semidislocation].
OBJECTIVE
Cervical vertebra semidislocation was one of major pathological aspects of cervical spondylosis, and it was also the target of manipulation to treat cervical spondylosis. The aim of this study was to combine the technology of three dimensional finite element analysis to investigate the method to construct the cervical vertebra semidislocation model.


METHODS
A cervical spondylosis patient (male, 28 years old,176 cm tall, weight 69 kg) was randomly chosen, who was diagnosed cervical vertebra semidislocation by dynamic and static palpation and X-ray,and CT scanned from C1 to C7 by 0.75 mm slice thickness. Based on the CT data, the software was used to construct the three dimensional finite element model of cervical vertebra semidislocation (C4-C6).


RESULTS
The model showed the three dimensional changes of vertebra semidislocation clearly. C5 had a three-dimensional abnormal position, which was downward translation for 0.9 mm and clockwise rotation for 4.5 degrees around X-axis. So C5 was diagnosed as hypokinesis-type semidislocation.


CONCLUSIONS
The method to construct the three dimensional finite element model of cervical vertebra semidislocation is reliable, which provide a base study to analyse the mechanism of manipulation to treat vertebra semidislocation.
Zhang
Ming-Cai
MC
Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200021, China
Lu
Si-Zhe
SZ
Zhan
Hong-Sheng
HS
Gu
Li-Xu
LX
Shi
Yin-Yu
YY
Wang
Xiang
X
Huang
Shi-Rong
SR
D000328:Adult; D002574:Cervical Vertebrae; D020342:Finite Element Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D020407:Internet; D004204:Joint Dislocations / Q000150:complications / Q000000981:diagnostic imaging; D008297:Male; D008953:Models, Anatomic; D055009:Spondylosis / Q000150:complications; D014057:Tomography, X-Ray Computed