Comparison of specimen-specific vertebral body finite element models with experimental digital image correlation measurements.
biomechanical · Level V
Where this comes from
- Record sourced from PubMed, PMID 27776322.
- Also identified by DOI 10.1016/j.jmbbm.2016.10.002.
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Abstract
The purpose of this study was to load cadaveric vertebral bodies (n=6) in compression and compare the response, measured with digital image correlation (DIC) on the cortex, with the predicted response from specimen-specific vertebral finite element (FE) models. Five modulus-density relationships were evaluated, and for the strongest modulus-density relationship, the correlation between the DIC and FE displacements had R<sup>2</sup> values from 0.75 to 0.93. The stiffnesses derived from the DIC measurements were strongly predicted by the FE stiffnesses (R<sup>2</sup>=0.90). DIC provides full-field measurements of surface displacement, eliminating the influence of system compliance, for validation of specimen-specific models.
Medical subject headings
- Finite Element Analysis
- Image Interpretation, Computer-Assisted
- Spine