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Journal of Tsinghua University(Science and Technology)    2014, Vol. 54 Issue (2) : 172-177     DOI:
Orginal Article |
Geometric parameter analysis of Chinese cervical discs
Weiqiang LIU1,2,3(),Ting PU1,2,Hongsheng GU4,Zhenhua LIAO2,Jinpeng JIANG3
1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
2. Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China
3. Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China
4. Shenzhen Second People's Hospital, Shenzhen 518049, China
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Abstract  

A protocol is developed for precise measurements of the geometric parameters of cervical discs as a basis for the design of artificial cervical discs for Chinese people and the selection of total disc replacement models. The six key parameters (i.e., the anterior height, the middle height, the posterior height, the intervertebral angle, the sagittal diameter and the transverse diameter) of all the five cervical intervertebral discs, C23, C34, C45, C56 and C67, are measured from a magnetic resonance imaging (MRI) database of normal Chinese discs. Chinese cervical disc geometric characteristics are then analyzed statistically. The height of a normal Chinese cervical disc tends to increase first and then decrease with age, with the maximum at 39-48 years old. All six parameters increase about linearly from the upper to the lower discs except for the intervertebral angle. The parameters for females are about 90% of those for males.
Keywords cervical disc      magnetic resonance imaging (MRI)      geometric parameter measurement      artificial cervical disc     
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Issue Date: 15 February 2014
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Weiqiang LIU
Ting PU
Hongsheng GU
Zhenhua LIAO
Jinpeng JIANG
Cite this article:   
Weiqiang LIU,Ting PU,Hongsheng GU, et al. Geometric parameter analysis of Chinese cervical discs[J]. Journal of Tsinghua University(Science and Technology), 2014, 54(2): 172-177.
URL:  
http://jst.tsinghuajournals.com/EN/     OR     http://jst.tsinghuajournals.com/EN/Y2014/V54/I2/172
  
  
年龄/岁 男性 女性
样本量 (平均年龄±
标准差)/岁		 样本量 (平均年龄±
标准差)/岁
16~28 180 24.67±2.75 164 25.17±2.90
29~38 264 33.46±3.02 314 33.36±2.82
39~48 233 42.49±2.78 258 42.95±2.72
49~58 39 52.31±2.60 92 52.59±3.06
59~68 21 62.05±2.85 32 62.97±3.14
  
  
  
尺寸参数 男性 女性
AH/mm 0.25n+3.05 0.23n+2.68
MH/mm 0.21n+4.72 0.22n+4.22
PH/mm 0.07n+2.67 0.08n+2.37
IVA/(°) 0.60 exp(n/3.08)+2.23 1.61 exp(n/5.90)+0.10
S/mm 0.45n+14.87 0.37n+13.51
T/mm 1.39n+19.22 1.41n+17.16
  
节段 女性尺寸与男性尺寸的比值/%
AH MH PH IVA S T
C23 86.90 90.69 89.76 95.46 90.02 88.69
C34 89.83 90.60 90.14 96.18 90.09 90.91
C45 89.81 90.65 89.95 95.92 90.50 91.60
C56 88.40 91.58 91.40 95.12 89.61 92.37
C67 89.24 92.65 92.25 90.02 89.48 92.00
  
节段 男性 女性
C23 81.55 71.46
C34 68.89 70.35
C45 74.19 76.32
C56 84.81 80.07
C67 84.07 85.94
  
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