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J Mater Sci Technol  2009, Vol. 25 Issue (03): 325-328    DOI:
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Effect of Elastic Modulus on Biomechanical Properties of Lumbar Interbody Fusion Cage
Yue Zhu1)†, Fusheng Li2), Shujun Li3), Yulin Hao3) and Rui Yang3)
1) Department of Orthopaedics, the First A±liated Hospital of China Medical University, Shenyang 110001, China
2) Department of Bone Tumor, The People0s Hospital of Liaoning Province, Shenyang 110016, China
3) Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
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Abstract  

This work focuses on the influence of elastic modulus on biomechanical properties of lumbar interbody fusion cages by selecting two titanium alloys with different elastic modulus. They were made by a new β type alloy with chemical composition of Ti-24Nb-4Zr-7.6Sn having low Young0s modulus ~50 GPa and by a conventional
biomedical alloy Ti-6Al-4V having Young0s modulus »110 GPa. The results showed that the designed cages with low modulus (LMC) and high modulus (HMC) can keep identical compression load ~9.8 kN and endure fatigue cycles higher than 5×106 without functional or mechanical failure under 2.0 kN axial compression. The
anti-subsidence ability of both group cages were examined by axial compression of thoracic spine specimens (T9~T10) dissected freshly from the calf with averaged age of 6 months. The results showed that the LMC has better anti-subsidence ability than the HMC (p<0.05). The above results suggest that the cage with low elastic modulus has great potential for clinical applications.

Key words:  Titanium alloy; Lumbar; Interbody fusion cage; Biomechanics     
Received:  11 April 2008     
Corresponding Authors:  Yue Zhu     E-mail:  zhuyuedr@163.com

Cite this article: 

Yue Zhu,Fusheng Li,Shujun Li,Yulin Hao,Rui Yang. Effect of Elastic Modulus on Biomechanical Properties of Lumbar Interbody Fusion Cage. J Mater Sci Technol, 2009, 25(03): 325-328.

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