Fatigue and tensile properties of radicular dentin substrate

Inoue, Toshiko; Nishimura, Fumio; Debari, Kazuhiro; Kou, Keitatsu; Miyazaki, Takashi

doi:10.1016/j.jbiomech.2010.11.025

Cited by 12 publications

(18 citation statements)

References 43 publications

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“…Because of the influence of tubule orientation on the monotonic properties of radicular dentin, the fatigue strength would be expected to exhibit a similar dependence. The fatigue strength of bovine radicular dentin was recently evaluated in a perpendicular orientation and found to be approximately 44 MPa at a life of 10 5 cycles. Using the value of tensile strength reported in that study, the AR for radicular dentin is approximately 2.…”

Section: Mechanical Properties Of Dentinmentioning

confidence: 99%

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Microstructure and mechanical behavior of radicular and coronal dentin

Arola¹,

Ivancik²,

Majd³

et al. 2009

Endodontic Topics

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Fracture of root‐filled teeth is not uncommon and appears to be a complex function of both the treatment and the patient's oral regimen. However, there have been few studies aimed at understanding the intrinsic mechanical behavior of dentin and its relevance to the incidence of these fractures. In addition, there has been some controversy over whether the fracture of root‐filled teeth is attributed primarily to loss of tooth structure or if there are other contributing factors. A comprehensive understanding of the structure and mechanical behavior of dentin is of substantial importance to the success of endodontic therapy. Specifically, the importance of fatigue on tooth fractures and the resistance of tissues to both the initiation and propagation of cracks have received scant attention. As well, regional variations in these properties and the contribution of changes in microstructure to the fatigue and fracture behavior are not well understood. This article reviews the importance of microstructure on the mechanical behavior of dentin and compares the mechanical properties of tissue from the root and crown. Also, the changes in microstructure with aging are discussed as well as their importance to the incidence of tooth fracture.

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Section: Mechanical Properties Of Dentinmentioning

confidence: 99%

“…Zero to tension (flexure) identified at 10 6 cycles. The value for radicular dentin was determined for 10 5 cycles .…”

Section: Mechanical Properties Of Dentinmentioning

confidence: 99%

Microstructure and mechanical behavior of radicular and coronal dentin

Arola¹,

Ivancik²,

Majd³

et al. 2009

Endodontic Topics

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“…As specimen was moved by a motor, the roller guide followed the template. The turbine head, which moved up and down, slid along the template and produced uniformly shaped specimens 26) . Dumbbell-shaped specimens with a narrow central portion (1.0×1.0×1.5 mm) (Fig.…”

Section: Human and Bovine Teethmentioning

confidence: 99%

“…Specimen size and shape determine tensile test results, and dumbbell-shaped specimens were reportedly useful for identifying defects easily 5,19,[23][24][25][26] . For this reason, a profi ling machine was used to produce uniformly shaped dumbbell specimens in this study, and that the surfaces of the narrow central portion were fi nished with 1200-grit wet silicon carbide papers 5,19,[23][24][25][26] .…”

Section: Effect Of Specimen Size and Shape On Tensile Strength In Dentinmentioning

confidence: 99%

“…For this reason, a profi ling machine was used to produce uniformly shaped dumbbell specimens in this study, and that the surfaces of the narrow central portion were fi nished with 1200-grit wet silicon carbide papers 5,19,[23][24][25][26] . Results of this study revealed that the mechanical properties of coronal dentin displayed pronounced anisotropy as a function of the orientation of incremental lines.…”

Section: Effect Of Specimen Size and Shape On Tensile Strength In Dentinmentioning

confidence: 99%

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Relation between incremental lines and tensile strength of coronal dentin

et al. 2012

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In one aspect, this study examined the tensile strength of coronal dentin, as a function of the location of incremental lines, in two types of teeth: human molar versus bovine incisor. In another aspect, tensile strength in coronal dentin was examined with tensile loading in two different orientations to the incremental lines: parallel versus perpendicular. There were four experimental groups in this study: HPa, human molar dentin with tensile orientation parallel to the incremental lines; HPe, human molar dentin with tensile orientation perpendicular to the incremental lines; BPa, bovine incisor dentin with tensile orientation parallel to the incremental lines; BPe, bovine incisor dentin with tensile orientation perpendicular to the incremental lines. Tensile strengths of the parallel group (HPa and BPa) were signifi cantly higher (p<0.05) than those of the perpendicular group (HPe and BPe). Effect of structural anisotropy, contributed by the incremental lines, was thus confi rmed in coronal dentin. However, there were no differences in anisotropy effect between the two tooth types.

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