Spatial orientation in bone samples and Young's modulus
| Autor: | W.G.M. Geraets, T.M.G.J. van Eijden, P.F. van der Stelt, J G C Verheij, L.J. van Ruijven |
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| Přispěvatelé: | Functionele_Anatomie (OUD, ACTA), Faculteit der Geneeskunde |
| Rok vydání: | 2008 |
| Předmět: |
Male
Engineering drawing Compressive Strength Biomedical Engineering Biophysics Modulus Young's modulus Models Biological Bone and Bones symbols.namesake Imaging Three-Dimensional Bone Density Orientation (geometry) Linear regression medicine Humans Orthopedics and Sports Medicine Composite material Anisotropy Mathematics Stiffness matrix Models Statistical Spatial structure Rehabilitation Mandibular Condyle Stiffness Models Theoretical Elasticity Biomechanical Phenomena symbols Female medicine.symptom Tomography X-Ray Computed |
| Zdroj: | Journal of Biomechanics, 41(10), 2206-2210. Elsevier Geraets, W G M, van Ruijven, L J, Verheij, H G C, van der Stelt, P F & van Eijden, T M G J 2008, ' Spatial orientation in bone samples and Young's modulus ', Journal of Biomechanics, vol. 41, no. 10, pp. 2206-2210 . https://doi.org/10.1016/j.jbiomech.2008.04.016 Journal of Biomechanics, 41(10), 2206-2210. Elsevier Limited |
| ISSN: | 1873-2380 0021-9290 |
| Popis: | Bone mass is the most important determinant of the mechanical strength of bones, and spatial structure is the second. In general, thespatial structure and mechanical properties of bones such as the breaking strength are direction dependent. The mean intercept length(MIL) and line frequency deviation (LFD) are two methods for quantifying directional aspects of the spatial structure of bone. Young’smodulus is commonly used to describe the stiffness of bone, which is also a direction-dependent mechanical property. The aim of thisarticle is to investigate the relation between MIL and LFD on one hand and Young’s modulus on the other.From 11 human mandibular condyles, 44 samples were taken and scanned with high-resolution computer tomography equipment(micro-CT). For each sample the MIL and LFD were determined in 72 602 directions distributed evenly in 3D space. In the samedirections Young’s modulus was determined by means of the stiffness tensor that had been determined for each sample by finite elementanalysis. To investigate the relation between the MIL and LFD on one hand and Young’s modulus on the other, multiple regression wasused.On average the MIL accounted for 69% of the variance in Young’s modulus in the 44 samples and the LFD accounted for 72%. Theaverage percentage of variance accounted for increased to 80% when the MIL was combined with the LFD to predict Young’s modulus.Obviously MIL and LFD to some extent are complementary with respect to predicting Young’s modulus. It is known that directionalplots of the MIL tend to be ellipses or ellipsoids. It is speculated that ellipsoids are not always sufficient to describe Young’s modulus of abone sample and that the LFD partly compensates for this. |
| Databáze: | OpenAIRE |
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