• World Neurosurg · Apr 2019

    Biomechanical evaluation of an anterior upper thoracic plate fixation system：an in vitro human cadaveric study.

    • Chunxiang Xiong, Juli Luo, Dong Yin, Xinli Zhan, and Huijiang Liu.
    • Co Culture of Post-doctoral Research Center of People's Hospital of Guangxi Zhuang Autonomous Region and Post-doctoral Mobile Station of Clinical Medicine of Shanxi Medical University, Nanning, Guangxi, People's Republic of China; Department of Orthopedics, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, People's Republic of China.
    • World Neurosurg. 2019 Apr 1; 124: e503e509e503-e509.

    ObjectiveThis study aimed to evaluate the biomechanical characteristics of the anterior upper thoracic plate fixation system (AUTP).MethodsTwelve specimens were divided into 2 groups: the AUTP group and the anterior cervical locking plate (ACLP) group. Bone mineral density was assessed in all specimens. The specimens were loaded with pure bending moments of ±4 Nm to move toward extension/flexion, right/left lateral tilt, and right/left axial rotation. Each specimen was tested in 3 load cycles under 3 conditions (native, destabilized, and torsion). The tightening moments were assessed in every screw using a torsion meter.ResultsThe tightening moment of the AUTP screws was more pronounced than the ACLP (P < 0.05). Significant decreases after stabilization with the AUTP compared with the native situation were observed in the AUTP group (P < 0.05). In terms of the direction of lateral tilt and torsion, the neutral zone increased significantly after stabilization with the AUTP compared with the native situation (P < 0.05).ConclusionsThe AUTP was shown to provide more rigidity to the destabilized spine than the ACLP.Copyright © 2019 Elsevier Inc. All rights reserved.

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