The density and branching of dentinal tubules in human teeth

Mjör, Ivar A.; Nordahl, Inger

doi:10.1016/0003-9969(96)00008-8

Cited by 266 publications

(214 citation statements)

References 20 publications

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“…Different root regions show different distributions and densities of dentin tubules. The densities and the number of dentin tubules decreased significantly from the coronal to apical root regions (12). The findings of the present Table 3.…”

Section: Discussionsupporting

confidence: 63%

Regional bond strengths to root canal dentin of fiber posts luted with three cementation systems

et al. 2011

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This study evaluated the influence of the cementation system on the regional push-out bond strength and failure pattern of fiber posts to radicular dentin. The roots of 48 extracted human incisors were prepared and divided into 3 groups (n=16), according to the cementation system: AdperScotchbond Multi-Purpose + resin cement RelyX ARC (SBMP+ARC); Adper SingleBond 2 + RelyX ARC (SB+ARC) and; RelyX U100 self-adhesive resin cement (U100). The posts were cemented as per manufacturer's instructions for each cementation system. After 1 week, the roots were sectioned transversely into 6 discs. Two discs were obtained from the cervical, middle and apical thirds and the push-out test was carried out. The failure pattern was examined on all debonded specimens. The data were analyzed by two-way repeated measures ANOVA and Tukey's test. When U100 was used, no statistically significant difference (p>0.05) was observed among the different root regions. Statistically higher push-out bond strength values were detected in the cervical third for SBMP+ARC and SB+ARC (p<0.05). The U100 showed significantly more mixed failures than SBMP+ARC in the apical third (p<0.05). In conclusion, the self-adhesive cement RelyX U100 was the only cement not sensitive to the root canal region.

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Section: Discussionsupporting

confidence: 63%

Regional bond strengths to root canal dentin of fiber posts luted with three cementation systems

et al. 2011

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“…9a-d and 10a-d) and they can be differentiated on the basis of size, location and direction of the branches in relation to the main tubule (1). Major branches of the tubules are found peripherally up to approximately 250 mm from the outer surface in both coronal and root dentin.…”

Section: Branches Of the Dentinal Tubulesmentioning

confidence: 99%

“…Since the dentinal tubules are cylindrical in shape and extend through the entire width of the dentin, the density of tubules is greater near the pulp than peripherally. In addition the branching of the tubules varies in different parts of teeth resulting in distinct differences in the structure of dentin (1). These differences are likely to affect the permeability of the tissue.…”

Section: Introductionmentioning

confidence: 99%

Dentin permeability: the basis for understanding pulp reactions and adhesive technology

Mjör

2009

Braz. Dent. J.

121

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Permeability involves the passage of fluids, ions, molecules, particulate matter and bacteria into and through a substance or tissue under different and varying conditions. The permeability of the dentin is essential to support the physiology and reaction patterns of the pulp-dentin organ. Nutrients and impulses are transported from the pulp via the odontoblast process and the contents of its tubules maintain the dentin as a vital tissue. However, the main interest of this paper focuses on penetration from the outside towards the pulp rather than from the pulp towards the outside. The present overview centers on the dentinal tubules; how they are formed and how they change as a result of normal and abnormal function, age, and pathological processes and the effect of these processes on the permeability of dentin. Particular attention is focused on the patency of the dentinal tubules.This overview is largely based on the author's own research, clinical insights and active participation in continuing dental education over the last 50 years. It is not a review of the literature related to the permeability of dentin. Rather it presents interpretation of results related to the permeability of dentin based on experience and opinions acquired over a lifetime in dental research.

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“…"Etch and rinse" adhesive systems may be used together with dual cements during the fixation of fiber posts: after the removal of the smear layer due to the etching, an adhesive must be used to link the dentin to the cement used to fix the post. Some studies highlight that "etch and rinse" systems may reach better results in terms of higher bonding strength due to a thicker HL 11,12) and a higher density of RT 5,13) when compared to the self-etching systems. A recent micro push-out test study 14) revealed that some self-etching systems exert high bonding strength levels, even though they created a discontinuous HL and short RT.…”

Section: Introductionmentioning

confidence: 99%

Morphological confocal laser scanning microscope evaluation of four different “etch and rinse^|^quot; adhesives in post endodontic restoration

et al. 2012

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The aim of this study was to perform a morphometric evaluation of the resin-root canal dentine interface of four "etch and rinse" adhesive systems. Forty human teeth were restored through a fiber post insertion using: Group 1: XP Bond adhesive; Group 2: Prime & Bond NT; Group 3: Surgi Prime Bond adhesive; Group 4: Scotchbond Multi-Purpose Plus. Two cross-sections (apical and coronal) were obtained and analyzed in morphological confocal laser scanning microscope. The numbers of resin tags (RT) and the thickness of the hybrid layer (HL) were evaluated. Quantitative variables were tested by a Shapiro-Wilk test. Parametric variables by an Anova test. Group 4 produced the thickest HL and Group 1 showed the thinnest. Considering RT, Group 1 produced the highest density, while Group 3 the lowest density. All the adhesives produced good results in terms of HL thickness and RT density.

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The density and branching of dentinal tubules in human teeth

Cited by 266 publications

References 20 publications

Regional bond strengths to root canal dentin of fiber posts luted with three cementation systems

Regional bond strengths to root canal dentin of fiber posts luted with three cementation systems

Dentin permeability: the basis for understanding pulp reactions and adhesive technology

Morphological confocal laser scanning microscope evaluation of four different “etch and rinse^|^quot; adhesives in post endodontic restoration

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