Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (9): 1583-1587.doi: 10.3969/j.issn.1673-8225.2011.09.016

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Matching between intergrated anterior cervical plate cage benezech implant and biomechanical environment

Yang Yue-zhou1, Xu Yao-zeng2, Du Xing-ye2, Geng De-chun2, Yang Hui-lin2   

  1. 1Department of Orthopaedics, Charity Hospital of Wuxi, Wuxi  214000, Jiangsu Province, China
    2Department of Orthopaedics, First Affiliated Hospital of Soochow University, Suzhou  215006, Jiangsu Province, China
  • Received:2010-08-21 Revised:2010-10-20 Online:2011-02-26 Published:2011-02-26
  • About author:Yang Yue-zhou★, Master, Attending physician, Department of Orthopaedics, Charity Hospital of Wuxi, Wuxi 214000, Jiangsu Province, China yangyuezhou@sina. com

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Abstract:

BACKGROUND: Studies demonstrated that intergrated anterior cervical plate cage benezech implant (PCB) superior to used plates and fusion cage theoretically. However, reports concerning biomechanical analysis of the PCB are few.
OBJECTIVE: To investigate biomechanical characteristics of the PCB.
METHODS: Five types were made in 6 adult cadaveric cervical spines: normal, simulated vertebral disc removal, PCB fixation, CBK fusion cage fixation, CBK fusion cage and Secuplate titanium plate conjoined fixation. Their stability was tested by experimental stress analysis at C5-6.
RESULTS AND CONCLUSION: The cervical spine became unstable and the range of motion increased significantly after the removal of vertebral disc. Compared with simulated vertebral disc removal group, after instrumentation of cervical PCB fixation, the strength increased 24%, the flexibility decreased 31%, the stiffness increased 14.3%, and the migration decreased 15% (P < 0.05). There was significant difference between the PCB fixation group and simulated vertebral disc removal one (P  < 0.05). And the range of motion of the cervical spine after the insertion of correct size of PCB was similar to that of intact condition. The CBK fusion cage group was unsatisfied under extension and torsion tests, but there was significant difference between CBK fusion cage fixation group and simulated vertebral disc removal one (P  < 0.05). Compared with simulated vertebral disc removal group, after instrumentation of cervical CBK fusion cage and Secuplate titanium plate conjoined fixation, the strength increased 27%, the flexibility decreased 38%, the stiffness increased 17%, and the migration decreased 17% (P  < 0.05). But the motion of the segment following insertion of CBK fusion cage and Secuplate titanium plate conjoined fixation almost lost and the range of motion of the adjacent segment increased. PCB has occupied advantages of both secuplate titanium plate fixation and CBK fusion cage fixation which could match the biomechanical environment.

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