Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (30): 5631-5635.doi: 10.3969/j.issn.1673-8225.2011.30.030

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The advance in metal pedicle screw and its alternative biomaterials

Zhang Lei, Yang Hui-lin, Zhu Xue-song, Li Ji-gang   

  1. Department of Orthopedics, the Affiliated Hospital of Soochow University, Suzhou  215006, Jiangsu Province, China
  • Received:2011-01-04 Revised:2011-03-17 Online:2011-07-23 Published:2011-07-23
  • Contact: Yang Hui-lin, Chief physician, Department of Orthopedics, the Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China suzhouspine@163. com
  • About author:Zhang Lei★, Studying for master’s degree, Department of Orthopedics, the Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China zlsuda2003@163.com

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Abstract:

BACKGROUND: Pedicle screw fixation systems are widely used in spinal fractures, degeneration diseases, cancer and other diseases, the materials, design of pedicle screws and biomaterials are in the great development.
OBJECTIVE: To summarize the investigative situation and progression about design of pedicle screws at home and abroad.
METHODS: Databases of CNKI (1994/2010) and PubMed (1959/2010) were selected to search the related articles about pedicle screws with keywords of “pedicle screw, biomechanics, design and biomaterial” in Chinese and English. Then, 36 articles related to pedicle screws were included in result analysis.
RESULTS AND CONCLUSION: Using Titanium system, increased diameter and length of screws, special pedicle screws such as expendable screws, and pedicle screws augmentation with biomaterials can improve fixation rigidity. Besides, screw shape, thread shape, inclination angle, thread depth and pitch are closely related with fixation rigidity of pedicle screws. We should take more factors into considerations to design more reasonable pedicle screws.

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