Anisotropy of Tensile Strengths of Bovine Dentin Regarding Dentinal Tubule Orientation and Location.

The mechanical properties of human dentin for 3-D finite element modeling – numerical and analytical evaluation

“…21 The earlier published dentin tensile strength results confirmed the anisotropic behavior of the dentin and the influence of the tubules direction on the strength. 19,24 The high anisotropy value may be also explained by the simplification of geometry when dentinal tubules are modeled as straight tubes. However, the influences of the S-shaped dentinal tubules on the results have not been evaluated in this paper.…”

“…11 The dentin structure was assumed to be a transversely isotropic medium with one axis of symmetry, parallel to the direction of the dentinal tubules. 14,15 In this case, the micromechanical model used for homogenization was a unidirectional structure with long cylindrical voids embedded in an isotropic matrix. The micromechanical model allowed the strain concentration tensor and corresponding effective stiffness tensor (material properties) of the dentin structure to be determined according to Luciano and Barbero: 10 Where: P is a 4 rank tensor, which describes the geometry of the voids, microstructures, and the distribution of the voids, V f the volume fraction of the voids (lumen tubules), C f , C ms the 4 rank stiffness tensors of the voids (lumen tubules) and matrix (dentin), both isotropic.…”

Comparison of nanohardness between coronal and radicular intertubular dentin

“…The fracture surfaces ofcoronaldentinaredifferentfromthoseofradicular dentin as observed by scanning microscopy after tensile tests. In particular, the fracture surfaces of coronal intertubular dentin are smooth whereas thoseofradicularintertubulardentinarerough 5) . However, a large sample size is needed when performing tensile tests, and dentinal tubules are known to vary in length between specimens 13) .…”

“…Tensile strength of radicular dentin is greater than that of coronal dentin [5][6][7] . Tensile tests using dumbbell-shaped specimens are reportedly useful for identifying defects easily 5,[8][9][10][11][12] . The fracture surfaces ofcoronaldentinaredifferentfromthoseofradicular dentin as observed by scanning microscopy after tensile tests.…”

The Effect of Bleaching on the Elastic Modulus of Bovine Enamel

“…In particular, in the context of clinical applications, materials should have compatible moduli. On this note, elastic moduli of tooth substrates and restorative materials have been measured with compressive, flexural, and tensile tests [9][10][11][12][13] . Owing to localized structural variations, reported mechanical properties of teeth have run the whole gamut.…”