title: Comparison of stress distribution of thoracolumbar vertebrae under forces with CT value.
abstract: OBJECTIVE: To provide a new method to estimate t he effectiveness of thoracolumbar vertebral finite element model. METHODS: A mechanical model of human thoracolumbar vertebrae mo tion segment was made using three-dimensional finite element method and the str ess distribution of vertically compressed thoracolumbar vertebrae was analyzed, meanwhile, 20 patients with burst fracture of thoracolumbar vertebrae were t ested by CT to calculated average CT value at ascertained different points of th oracolumbar vertebrae. The calculated results and effective stress at the same p osition were analyzed with straight line correlation. RESULTS: The stress level of different position of thoracolumba r vertebrae under vertical compressive force was positively correlated with the correlative CT value, and the regressive style, Y=214.028+45.268X, r=0.7386, P<0.05 (n=8) showed a statistical significance. CONCLUSIONS: To study mechanism of thoracolumbar vertebrae in juries under different forces has clinical significance.
authors.affiliation: The Air Force Hospital of Chengdu, Sichuan 610061, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Yiping
authors.initials: Y
authors.lastname: Chen
authors.forename: Daizhong
authors.initials: D
authors.lastname: Heng
authors.forename: Cong
authors.initials: C
authors.lastname: Zhang
authors.forename: Xianrong
authors.initials: X
authors.lastname: Luo
authors.forename: Yimin
authors.initials: Y
authors.lastname: Yao
authors.forename: Genbiao
authors.initials: G
authors.lastname: Shen