Scanning Electron Microscopic Study on the Fibrillar Structures within Dentinal Tubules of Human Dentin

Garcés-Ortı́z, Maricela; Ledesma‐Montes, Constantino; Reyes‐Gasga, J.

doi:10.1016/j.joen.2015.02.026

Cited by 12 publications

(6 citation statements)

References 34 publications

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“…These microfibril structures ( Fig. 6 D, green arrow (right column)), attached to the dentin walls, form a continuous structure in the dentinal tissue associated with the odontoblastic process [ 65 ]. Apposite weaved microfibril networks were observed in the m ZM specimen in clear contrast to the discontinuous microfibril network in the Control group.…”

Section: Resultsmentioning

confidence: 99%

Multivalent network modifier upregulates bioactivity of multispecies biofilm-resistant polyalkenoate cement

Kim

Choi

Mangal

et al. 2022

Bioactive Materials

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Section: Resultsmentioning

confidence: 99%

Multivalent network modifier upregulates bioactivity of multispecies biofilm-resistant polyalkenoate cement

Kim

Choi

Mangal

et al. 2022

Bioactive Materials

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“…In order to obtain reliable information about dentinal tubules, it is important for the research to be conducted on dentin that has not been decalcified. When studying decalcified human dentin, researchers found that the diameters of dentinal tubules were larger than those reported for non-decalcified dentin (Fromme & Riedel, 1970;Garberoglio & Brännström, 1972;Pessoa et al, 2013;Garcés-Ortíz et al, 2015;Kranz et al, 2022). Clearly, one of the reasons for this discrepancy is that the decalcification leads to the almost complete removal of peritubular dentin.…”

Section: Discussionmentioning

confidence: 96%

Quantity and diameter of dentinal tubules of human teeth and teeth of experimental animals according to scanning electron microscopy data

Gevkaliuk,

Martyts,

Mykhailiuk

et al. 2023

Regul. Mech. Biosyst.

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Insight into the interrelation between the structure and mechanical properties of dentin of a tooth is crucial for prevention and treatment of oral cavity diseases. The study of the structure of dental dentin is important for understanding the pathogenetic mechanisms of the spread of cariogenic microflora in progressive dental caries to the pulp and periodontium, as well as for the interpretation of the results of studies of dental dentin-adhesive materials. The in vitro research presented here involved the examination of coronal dentin in 46 intact teeth from rats, cats, dogs, and humans at various distances from the pulp chamber, with a focus on the quantity and diameter of dentinal tubules. The calculations were based on the analysis of 155 scanning electron microscope photographs of the enamel surface and pulp chamber wall. The researchers calculated the quantity and diameter of dentinal tubules per unit area, which they measured at various distances from the pulp chamber. It was found that dentinal tubules are the widest near the pulp chamber wall, where the average diameter ranged from 1.7 to 2.8 µm. The highest values were found in premolars of young humans and the lowest - in the incisors of rats. In the middle portion of the dentin, the diameter of dentinal tubules ranged from 1.0 to 13.3 µm, while at the periphery, it was 0.6–0.9 µm. The highest density of dentinal tubules per unit area was found closest to the pulp horn, and the lowest was in the enamel region. Near the pulp chamber wall, the average density of dentinal tubules ranged from 50 000 to 90 000/mm², in the middle of the dentin, it ranged from 37 000 to 50 000/mm², and at the periphery, it ranged from 10 000 to 25 000/mm². All examined teeth exhibited straight dentinal tubules, except for the rats’ incisors, which showed local irregularities. A comparison was made based on the quantity and width of dentinal tubules in the examined animals and humans.

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“…In this context, the ability of restorative materials to adhere to the dentin surface is affected by several factors [1], which include the dentin heterogeneity regarding morphology, orientation, quantity, and size of dentinal tubules, all of them influencing the dentin degree of humidity [2][3][4][5][6]. Since humidity plays a crucial role in the dentin bond phenomenon, all these factors may jeopardize the establishment of an effective and long-lasting bond strength between the tooth and the dental composite used for restoring the tooth.…”

Section: Introductionmentioning

confidence: 99%

Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation

Correia,

Poskus,

Guimarães

et al. 2024

Applied Sciences

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This study aimed to formulate and characterize experimental dental adhesives charged with different concentrations of nanofillers. Different concentrations (0, 7.5 wt%, and 15 wt%) of nanosized silica (50 nm) were added to the bond of a two-bottle experimental etch-and-rinse adhesive system (EA0, EA7.5, and EA15). The following physicomechanical properties were evaluated: degree of conversion (DC%), ultimate tensile strength (UTS), flexural strength (FS), static modulus of elasticity (SME), dynamic modulus of elasticity (DME), and glass transition temperature (Tg). Marginal integrity (%MG) was evaluated in standardized class I cavities hybridized with the EAs and restored using two dental composites (CON-conventional and OBF-bulk-fill): EA0CON, EA7.5CON, EA15CON, EA0OBF, EA7.5OBF, and EA15OBF. Gap formation was measured in the occlusal and mesial tooth-restoration interfaces using a 3D laser confocal microscope. Microtensile bond strength (µTBS) was evaluated using dentin-composite beams (1 × 1 mm) obtained from restorations. Data were submitted to ANOVA and Tukey’s test (α = 0.05). For DC% and Tg, EA15 < EA0 = EA7.5 (p < 0.05). For UTS, EA0 < EA7.5 < EA15. For FS, SME, and DME, EA0 < EA7.5 = EA15 (p < 0.05). For the gap formation analysis, there were statistical differences only for the conventional composite (EA0CON > EA7.5CON = EA15CON). The lowest values (p < 0.05) of µTBS were observed for the groups restored with EAs without inorganic content. In conclusion, charging dental adhesives with nanofillers may be a suitable strategy for improving their properties as well as their interaction with dental substrates.

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Scanning Electron Microscopic Study on the Fibrillar Structures within Dentinal Tubules of Human Dentin

Cited by 12 publications

References 34 publications

Multivalent network modifier upregulates bioactivity of multispecies biofilm-resistant polyalkenoate cement

Multivalent network modifier upregulates bioactivity of multispecies biofilm-resistant polyalkenoate cement

Quantity and diameter of dentinal tubules of human teeth and teeth of experimental animals according to scanning electron microscopy data

Formulation and Characterization of Experimental Adhesive Systems Charged with Different Concentrations of Nanofillers: Physicomechanical Properties and Marginal Gap Formation

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