Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (17): 3119-3123.doi: 10.3969/j.issn.1673-8225.2011.17.019

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Three-dimensional motion stability of upper thoratic anterior titanium plate fixed system: An in vitro biomechanical study

Luo Ju-li1, Zhan Xin-li1, Xiao Zeng-ming1, He Ju-liang1, Liu Hui-jiang1, Zhao Wei-dong2   

  1. 1Department of Orthopedics, the First Affiliated Hospital of Guangxi Medical University, Nanning  530021, Guangxi Zhuang Autonomous Region, China
    2Laboratory of Medical Biomechanics, Southern Medical University, Guangzhou  510515, Guangdong Province, China
  • Received:2010-11-30 Revised:2011-02-23 Online:2011-04-23 Published:2011-04-23
  • Contact: Zhan Xin-li, Professor, Department of Orthopedics, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China xl.zhandocter@yahoo.com.cn
  • About author:Luo Ju-li★, Master, Attending physician, Department of Orthopedics, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China luojuli282@163.com
  • Supported by:

    the National Natural Science Foundation of China, No. 30960386*; Guangxi Natural Science Foundation for the Youth, No.0832039*

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Abstract:

BACKGROUND: There are few reports about in vitro biomechanical studies of anterior cervical locking plate for upper thoracic reconstruction.
OBJECTIVE: To evaluate the biomechanical characters of self-designed upper thoratic anterior titanium plate fixed system.
METHODS: Intact C7-T6 specimens from 15 fresh corpses were randomly divided into three groups: group B with upper thoracic anterior titanium plate fixation (UTAPF), group C with prespred anterior cervical plate fixation (ACPF), group D with imprespred ACPF. Range of motion (ROM) was tested for the natural intact specimens. Measurement of three-dimensional stability was performed in flexion, extension and lateral bending and rotation state in groups B, C, D after fixation.
RESULTS AND CONCLUSION: ROM of the natural intact specimens in the three groups had no significant difference (P > 0.05). The stability of flexion arranged as follows: B>D>C>intact specimens (A). Significant difference between B and A was found (P=0.012). The stability of extension arranged as follows: B>C>A>D, but there was no significant difference among different groups. The stability of rotation arranged B>C>A>D. Between groups no significant difference was found in the rotation condition. The order of stabilities under the lateral bending was A>B>C>D. There were significant differences between A and C as well as between A and D (P=0.005, P=0.002). The findings indicate that the upper thoracic anterior titanium plate has a better biomechanical stability than cervical plate. If cervical anterior plate was applied to upper thoratic spine, plate should be prespred according to kyphosis of the upper thoratic spine.

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