Effects of Aging on Tensile Fatigue Strength of Bovine Dentin

Tonami, Ken‐ichi; Takahashi, Hidekazu

doi:10.4012/dmj.16.156

Cited by 49 publications

(35 citation statements)

References 20 publications

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“…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.…”

Section: Introductionmentioning

confidence: 99%

Comparison of nanohardness between coronal and radicular intertubular dentin

et al. 2009

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ThisstudyinvestigatedthehardnessandYoung'smodulusofcoronalandradicularintertubulardentin.Tenbovineteeth were each divided into coronal and radicular groups, and the flat surfaces of the coronal and radicular dentin were subsequentlyprocessedalongthetoothaxis.ThehardnessandYoung'smodulusofthecoronalandradicularintertubular dentinwereevaluatedusingnanoindentationtests,attwolocationspertooth.MeanhardnessandYoung'smodulusvalues werestatisticallycomparedbyone-wayANOVAandFisher'sPLSDtest.Thehardnessofcoronalintertubulardentinwas 0.81±0.05GPaandthatofradiculardentinwas0.55±0.02GPa.Additionally,theYoung'smodulusofcoronalintertubular dentin was 26.60±2.19 GPa and that of radicular dentin was 20.89±1.10 GPa. Findings of this study revealed that the hardnessandYoung'smodulusofcoronalintertubulardentinweregreaterthanthoseofradicularintertubulardentin.

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Section: Introductionmentioning

confidence: 99%

Comparison of nanohardness between coronal and radicular intertubular dentin

et al. 2009

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“…The slabs were sectioned from an area of mid-coronal dentin, 2.4-3.4 mm from the tooth surface running parallel to the growth line (Fig. 1A) 21,22,[25][26][27] . A dentin slab was harvested from each tooth.…”

Section: Specimen Preparationmentioning

confidence: 99%

“…In this manner, uniformly shaped specimens were obtained. All surfaces of the central narrow portion were finished with 1200-grit wet silicon carbide paper under wet conditions [21][22][23][24][25][26][27] .…”

Section: Specimen Preparationmentioning

confidence: 99%

Tensile Strength and Durability of Bovine Dentin

2007

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This study investigated the effects of thermal cycling on the tensile strength of dentin. Bovine dentin were divided into 10 groups, which were then subjected to various conditions: intact after preparation, thereby serving as a control; heating in boiling water for 45 minutes; 10,000 thermal cycles in water; 10,000 thermal cycles in PBS; storage in water at 5, 23, or 55℃ for two weeks; and storage in PBS at 5, 23, or 55℃ for two weeks. Subsequently, bovine dentin were trimmed into dumbbell-shaped specimens and the tensile test performed in distilled water at 37℃. Mean tensile strengths were compared statistically by one-way ANOVA and Fisher's PLTD test (p<0.05). Fracture surfaces were observed by scanning electron microscopy, and reliability of the results was analyzed with Weibull distribution. Tensile strength did not significantly change after thermal cycling or storage in water and PBS at all temperatures tested (71.2-77.0 MPa) but decreased after treatment with boiling water (65.5 MPa).

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“…A number of in vitro studies on cyclic crack growth in bovine [8][9][10], elephant [11,12] and human dentin [13][14][15] have been conducted in the recent past. These studies have been successful in quantifying the fatigue properties of dentin.…”

Section: Introductionmentioning

confidence: 99%

“…While it is plausible that fracture in the restored tooth results from a single catastrophic load, it is generally believed that such failures are the result of subcritical cracking induced by repetitive stresses, i.e., fatigue [3]. Damage induced by restorative processes can grow with time due to cyclic stresses resulting from mastication and can enable complete fracture of the tooth [4][5][6][7].A number of in vitro studies on cyclic crack growth in bovine [8][9][10], elephant [11,12] and human dentin [13][14][15] have been conducted in the recent past. These studies have been successful in quantifying the fatigue properties of dentin.…”

mentioning

confidence: 99%