Finite element analysis of Ni Ti shape memory alloy frame and bone graft with concrete for lumbar interbody fusion
DOI:
Author:
Affiliation:

Clc Number:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    Purpose: The objective of this study is to evaluate the postoperative biomechanics of NiTi memory alloy frame with absorbable bone cement/autogenous bone granule casting for lumbar interbody fusion. Methods: Validated model of normal L3-L5 segment finite element model (M0) , L4-5 intervertebral fusion model with box cage (M1), L4-5 intervertebral fusion model with NiTi memory alloy frame (M2) and L4-5 interbody fusion model with absorbable bone cement/autogenous bone granule casting (M3) were constructed. Under mechanical loading, the biomechanical stability of each model and the peak stress of L4 interior endplate were analyzed. Results: The range of motion of L4-5 segment in M1 and M2 models was significantly lower than that of M0 in flexion, extension, lateral flexion and axial rotation. In M3, the stability of the segment was further improved and the range of motion was even reduced by 96%. The stress distribution of M3 is relatively dispersed, and the peak stress is less than M1 and M2. Conclusion: NiTi memory alloy frame and traditional box fusion cage have biomechanical equivalence when used alone in lumbar interbody fusion. And application of concrete casting bone graft can further improve the stability and reduce the stress of endplate.

    Reference
    Related
    Cited by
Get Citation
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:November 20,2020
  • Revised:January 16,2021
  • Adopted:January 19,2021
  • Online:
  • Published: