The influence of pedicle screw placement on thoracic trabecular strain

Toh, Eiren; Yerby, Scott A.; Bay, Brian K.; McLain, Robert F.; Mochida, Joji

doi:10.1038/sj.sc.3101830

Cited by 2 publications

(1 citation statement)

References 38 publications

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“…DVC, together with contact radiographs of the tissues, was applied for mechanical strain measurement of specimens from proximal medial tibia of human cadavers under loading, and sharp rises in trabecular bone strain were found under increased subchondral bone defects (Brown, McKinley & Bay, 2002), complete meniscectomy (McKinley, English & Bay, 2003), or simulated subchondral stiffening (McKinley & Bay, 2003). Similarly, local mechanical strain fields in the mid-diaphyseal cortical bone of canine femurs (Kim, Brunski & Nicolella, 2005) and local distribution of minimum principal strain and maximum shear strain of intact (Yerby et al, 1998) and pedicle screw implanted thoracic spines of human cadavers (Toh et al, 2006) under mechanical loading were investigated with machine vision photogrammetry and digitized contact radiographs respectively, with DVC technique.…”

Section: Tc-based Image Analysis Of Mechanical Strainmentioning

confidence: 99%

Experimental mechanical strain measurement of tissues

Huang

Korhonen

Turunen

et al. 2019

PeerJ

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Strain, an important biomechanical factor, occurs at different scales from molecules and cells to tissues and organs in physiological conditions. Under mechanical strain, the strength of tissues and their micro- and nanocomponents, the structure, proliferation, differentiation and apoptosis of cells and even the cytokines expressed by cells probably shift. Thus, the measurement of mechanical strain (i.e., relative displacement or deformation) is critical to understand functional changes in tissues, and to elucidate basic relationships between mechanical loading and tissue response. In the last decades, a great number of methods have been developed and applied to measure the deformations and mechanical strains in tissues comprising bone, tendon, ligament, muscle and brain as well as blood vessels. In this article, we have reviewed the mechanical strain measurement from six aspects: electro-based, light-based, ultrasound-based, magnetic resonance-based and computed tomography-based techniques, and the texture correlation-based image processing method. The review may help solving the problems of experimental and mechanical strain measurement of tissues under different measurement environments.

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Section: Tc-based Image Analysis Of Mechanical Strainmentioning

confidence: 99%

Experimental mechanical strain measurement of tissues

Huang

Korhonen

Turunen

et al. 2019

PeerJ

View full text Add to dashboard Cite

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Whole Bone Strain Quantification by Image Registration: A Validation Study

Hardisty

Whyne

2009

Journal of Biomechanical Engineering

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Quantification of bone strain can be used to better understand fracture risk, bone healing, and bone turnover. The objective of this work was to develop and validate an intensity matching image registration method to accurately measure and spatially resolve strain in vertebrae using microCT imaging. A strain quantification method was developed that used two sequential microCT scans, taken in loaded and unloaded configurations. The image correlation algorithm implemented was a multiresolution intensity matching deformable registration that found a series of affine mapping between the unloaded and loaded scans. Once the registration was completed, the displacement field and strain field were calculated from the mappings obtained. Validation was done in two distinct ways: the first was to look at how well the method could quantify zero strain; the second was to look at how the method was able to reproduce a known applied strain field. Analytically defined strain fields that linearly varied in space and strain fields resulting from finite element analysis were used to test the strain measurement algorithm. The deformable registration method showed very good agreement with all cases imposed, establishing a detection limit of 0.0004 strain and displaying agreement with the imposed strain cases (average R2=0.96). The deformable registration routine developed was able to accurately measure both strain and displacement fields in whole rat vertebrae. A rigorous validation of any strain measurement method is needed that reports on the ability of the routine to measure strain in a variety of strain fields with differing spatial extents, within the structure of interest.

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The influence of pedicle screw placement on thoracic trabecular strain

Cited by 2 publications

References 38 publications

Experimental mechanical strain measurement of tissues

Experimental mechanical strain measurement of tissues

Whole Bone Strain Quantification by Image Registration: A Validation Study

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