Transition behavior in fatigue of human dentin: Structure and anisotropy

Arola, D.; Reid, Josephine; Cox, Marie E.; Bajaj, Devendra; Sundaram, N. Shanmuga; Romberg, Elaine

doi:10.1016/j.biomaterials.2007.05.001

Cited by 23 publications

(17 citation statements)

References 37 publications

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“…82 Dentin in young permanent teeth has an average fatigue crack growth exponent of m =13.3±1.1 in a hydrated environment, which is lower than that of dentin in a dry environment ( m =18.8±2.8). Crack bridging, crack deflection and crack bifurcation in young hydrated dentin assist energy dissipation and increase crack growth resistance.…”

Section: Fracture Mechanical Properties Of Enamel and Dentinmentioning

confidence: 96%

Review of research on the mechanical properties of the human tooth

et al. 2014

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‘Bronze teeth' reflect the mechanical properties of natural teeth to a certain extent. Their mechanical properties resemble those of a tough metal, and the gradient of these properties lies in the direction from outside to inside. These attributes confer human teeth with effective mastication ability. Understanding the various mechanical properties of human teeth and dental materials is the basis for the development of restorative materials. In this study, the elastic properties, dynamic mechanical properties (visco-elasticity) and fracture mechanical properties of enamel and dentin were reviewed to provide a more thorough understanding of the mechanical properties of human teeth.

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Section: Fracture Mechanical Properties Of Enamel and Dentinmentioning

confidence: 96%

Review of research on the mechanical properties of the human tooth

et al. 2014

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“…Dentin exhibits anisotropy in the fatigue crack growth resistance with respect to the tubule orientation [139][140][141]. A comparison of the fatigue crack growth behavior of dentin with cracks extending parallel, oblique and perpendicular to the tubules (0 deg, 45 deg, and 90 deg orientations, respectively) showed that cracks preferred to grow perpendicular to the tubule axis under cyclic loading.…”

Section: Fatigue Properties Of Dentinmentioning

confidence: 99%

“…Interestingly, although bone undergoes a decrease in the degree of mineralization with age, human dentin undergoes an increase [147][148][149]. The process begins in the third decade of life and is associated with a progressive filling of the dentin tubules with mineral until they become completely filled [10,140]. A comparison of the microstructure of dentin from young and old patients is shown in Fig.…”

Section: Influence Of Aging Dehydration and Other Factorsmentioning

confidence: 99%

On the Mechanics of Fatigue and Fracture in Teeth

Yahyazadehfar

Ivancik

Majd

et al. 2014

Applied Mechanics Reviews

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Tooth fracture is a major concern in the field of restorative dentistry. However, knowledge of the causes for tooth fracture has developed from contributions that are largely based within the field of mechanics. The present manuscript presents a technical review of advances in understanding the fracture of teeth and the fatigue and fracture behavior of their hard tissues (i.e., dentin and enamel). The importance of evaluating the fracture resistance of these materials, and the role of applied mechanics in developing this knowledge will be reviewed. In addition, the complex microstructures of tooth tissues, their roles in resisting tooth fracture, and the importance of hydration and aging on the fracture resistance of tooth tissues will be discussed. Studies in this area are essential for increasing the success of current treatments in dentistry, as well as in facilitating the development of novel bio-inspired restorative materials for the future.

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“…While true, tubule orientation is reportedly of limited or no importance to the microtensile strength of resin-dentin adhesive bonds [50–52]. Tubule orientation is important to the fatigue strength [53] and fatigue crack growth resistance of dentin [35,54], which is attributed to the collagen matrix. The difference in tubule orientation is not expected to have influenced the rank of the fatigue strength or fatigue crack growth responses.…”

Section: Discussionmentioning

confidence: 99%

On the durability of resin–dentin bonds: Identifying the weakest links

et al. 2015

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Fatigue of resin-dentin adhesive bonds is critical to the longevity of resin composite restorations. Objectives The objectives were to characterize the fatigue and fatigue crack growth resistance of resin-dentin bonds achieved using two different commercial adhesives and to identify apparent “weak-links”. Methods Bonded interface specimens were prepared using Adper Single Bond Plus (SB) or Adper Scotchbond Multi-Purpose (SBMP) adhesives and 3M Z100 resin composite according to the manufacturers instructions. The stress-life fatigue behavior was evaluated using the twin bonded interface approach and the fatigue crack growth resistance was examined using bonded interface Compact Tension (CT) specimens. Fatigue properties of the interfaces were compared to those of the resin-adhesive, resin composite and coronal dentin. Results The fatigue strength of the SBMP interface was significantly greater than that achieved by SB (p≤0.01). Both bonded interfaces exhibited significantly lower fatigue strength than that of the Z100 and dentin. Regarding the fatigue crack growth resistance, the stress intensity threshold (ΔKth) of the SB interface was significantly greater (p≤0.01) than that of the SBMP, whereas the ΔKth of the interfaces was more than twice that of the parent adhesives. Significance Collagen fibril reinforcement of the resin adhesive is essential to the fatigue crack growth resistance of resin-dentin bonds. Resin tags that are not well hybridized into the surrounding intertubular dentin and/or poor collagen integrity are detrimental to the bonded interface durability.

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Transition behavior in fatigue of human dentin: Structure and anisotropy

Cited by 23 publications

References 37 publications

Review of research on the mechanical properties of the human tooth

Review of research on the mechanical properties of the human tooth

On the Mechanics of Fatigue and Fracture in Teeth

On the durability of resin–dentin bonds: Identifying the weakest links

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