The uptake of water by freeze-dried human dentine sections

Graaf, E.R. van der; Bosch, J.J. ten

doi:10.1016/0003-9969(90)90096-s

Cited by 46 publications

(31 citation statements)

References 17 publications

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“…1). During rehydration, air-dried human dentin regains its original dimensions when wet again due to water uptake 14,15) . Therefore, it appeared that water sorption by dry dentin caused an expansion of the dentin substrate, and then further caused debonding between the tooth and the resin composite.…”

Section: Discussionmentioning

confidence: 99%

Effect of Water on Bonding of One-bottle Self-etching Adhesives

et al. 2008

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This study evaluated the effect of water on dentin substrate bonding of one-bottle self-etching adhesives. Dentin substrates were divided into two groups: wet and dry dentin. Wet dentin is the normal substrate for bond testing whereas dry dentin was dehydrated in a desiccator for 24 hours. Bonded dehydrated teeth were then divided into two subgroups: stored in water or in desiccator for 24 hours. Microtensile bond strength of resin to dentin was measured using three one-bottle self-etching adhesives. In addition, nanoleakage evaluation was performed through the analyses of SEM and TEM micrographs. The bond strength of dry-dentin group was significantly greater than that of wet-dentin. Further, the amount of nanoleakage within the adhesive interface of dry-dentin group was less than that of wet-dentin. Results showed that bond strength and nanoleakage formation depended on the bonding substrate (wet versus dry dentin) before bonding. One-bottle self-etching adhesives might suck the water from dentinal tubules during bonding by osmosis, leading to nanoleakage formation and thus a decline in bond strength.

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Section: Discussionmentioning

confidence: 99%

Effect of Water on Bonding of One-bottle Self-etching Adhesives

et al. 2008

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“…At a larger size scale, the most distinctive feature of the microstructure of dentin is the distribution of cylindrical tubules (1-2 lm diameter) that run from the dentin-enamel junction into the soft, interior pulp [2]. A majority ($75%) of the dentinal fluid is believed to lie within the tubules themselves, with the rest being distributed within the intertubular matrix [3].…”

Section: Introductionmentioning

confidence: 99%

Effects of polar solvents on the fracture resistance of dentin: role of water hydration

et al. 2005

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Although healthy dentin is invariably hydrated in vivo, from a perspective of examining the mechanisms of fracture in dentin, it is interesting to consider the role of water hydration. Furthermore, it is feasible that exposure to certain polar solvents, e.g., those found in clinical adhesives, can induce dehydration. In the present study, in vitro deformation and fracture experiments, the latter involving a resistance-curve (R-curve) approach (i.e., toughness evolution with crack extension), were conducted in order to assess changes in the constitutive and fracture behavior induced by three common solvents-acetone, ethanol and methanol. In addition, nanoindentation-based experiments were performed to evaluate the deformation behavior at the level of individual collagen fibers and ultraviolet Raman spectroscopy to evaluate changes in bonding. The results indicate a reversible effect of chemical dehydration, with increased fracture resistance, strength, and stiffness associated with lower hydrogen bonding ability of the solvent. These results are analyzed both in terms of intrinsic and extrinsic toughening phenomena to further understand the micromechanisms of fracture in dentin and the specific role of water hydration.

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“…There is also potential for the differences between the results of previous studies to be associated with the degree and nature of water loss. Hydrated dentin is comprised of approximately 75% free water (existing inside the tubule) and 25% bound within the intertubular region [33] . Free water is lost first at the onset of dehydration, followed by the progressive loss of bound water.…”

Section: Discussionmentioning

confidence: 99%

Importance of aging to dehydration shrinkage of human dentin

Wang

Mao

Romberg

et al. 2012

Appl. Math. Mech.-Engl. Ed.

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There is an increase in the mineral content of human dentin with aging. Due to the consequent changes in the mineral to the collagen ratio, this process may influence the degree of hydrogen bonding that occurs with the loss of water and the extent of shrinkage as a result of dehydration. Thus, the objective of this investigation is to quantify the differences in the dehydration shrinkage of human dentin with patient age. Specimens of coronal dentin are prepared from the molars of young (23 age 34) and old (52 age 62) patients, and then maintained in storage solutions of water or hanks balanced salt solutions (HBSS). Dimensional changes of the dentin specimens occurring over periods of free convection are evaluated by using the microscopic digital image correlation (DIC). The results distinguish that the shrinkage of the young dentin is significantly larger than that of the old dentin, regardless of the orientation and period of the storage. The strains parallel to the tubules increase with proximity to the dentin enamel junction (DEJ), whereas the shrinkage strains in the transverse direction are the largest in the deep dentin (i.e., near the pulp). The degree of anisotropy in the shrinkage increases from the pulp to the DEJ, and is the largest in the young dentin.

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The uptake of water by freeze-dried human dentine sections

Cited by 46 publications

References 17 publications

Effect of Water on Bonding of One-bottle Self-etching Adhesives

Effect of Water on Bonding of One-bottle Self-etching Adhesives

Effects of polar solvents on the fracture resistance of dentin: role of water hydration

Importance of aging to dehydration shrinkage of human dentin

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