Resin diffusion through demineralized dentin matrix

Carvalho, Ricardo Marins de; Ciucchi, B.; Sano, Hidehiko; Yoshiyama, Masahiro; Pashley, David H.

doi:10.1590/s0103-06631999000400016

Cited by 19 publications

(17 citation statements)

References 14 publications

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“…However, in the wet, oral environment, dentin adhesives can experience composition change and phase separation. The penetration of the adhesive into the wet demineralized dentin may take place by a combination of diffusion and convection resulting from external energy during adhesive application on the dentin substrate [25–27]. Since the hydrophobic component is also more viscous, it transports slower through both diffusion as well as convection, as compared to the hydrophilic component.…”

Section: Introductionmentioning

confidence: 99%

Swelling equilibrium of dentin adhesive polymers formed on the water–adhesive phase boundary: Experiments and micromechanical model

Misra

Ranganathan

et al. 2014

Acta Biomaterialia

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During their application to the wet, oral environment, dentin adhesives can experience phase separation and composition change which can compromise the quality of the hybrid layer formed at the dentin-adhesive interface. The chemical composition of polymer phases formed in the hybrid layer can be represented using a ternary water-adhesive phase diagram. In this paper, these polymer phases have been characterized using a suite of mechanical tests and swelling experiments. The experimental results were evaluated using granular micromechanics based model that incorporates poro-mechanical effects and polymer-solvent thermodynamics. The variation of the model parameters and model-predicted polymer properties has been studied as a function of composition along the phase boundary. The resulting structure-property correlations provide insight into interactions occurring at the molecular level in the saturated polymer system. These correlations can be used for modeling the mechanical behavior of hybrid layer, and are expected to aid in the design and improvement of water-compatible dentin adhesive polymers.

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Section: Introductionmentioning

confidence: 99%

Swelling equilibrium of dentin adhesive polymers formed on the water–adhesive phase boundary: Experiments and micromechanical model

Misra

Ranganathan

et al. 2014

Acta Biomaterialia

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“…31 Furthermore, consecutive acid etching causes demineralization zones with unpredictable depths 34 and insufficient diffusion depth of resin monomers. 35 The lower bonding strength values observed in the laseretched groups in the present study can probably be a result of this effect.…”

Section: Discussionmentioning

confidence: 56%

Fracture Resistance of Incisal Fragments Following Reattachment With Different Techniques in Simulated Crown Fractures

et al. 2017

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Introduction:The aim of the present study was to evaluate and compare the effect of acidetching and Er, Cr:YSGG laser treatment before the reattachment of incisal fragments in coronal fractures of permanent incisor teeth. Methods: Sixty-six sound human maxillary incisors were randomly divided into 3 groups (n=22). Teeth were embedded in self-cure acrylic resins by leaving one-third of the crowns out, and uncomplicated crown fractures were obtained using an Instron testing device. The fragments were reattached using 3 different procedures and a hybrid resin composite (Z250): Group I: Acid etching + Prime & Bond NT; Group II: Er,Cr:YSGG + Prime & Bond NT; Group III: Er,Cr:YSGG + Acid etching + Prime & Bond NT. The percentages of shear bond strengths were determined by comparing fracture strengths of sound and reattached teeth for 3 groups. All data were analyzed statistically with Kruskal-Wallis H test. Results: Mean fracture strengths of the reattached fragments were between 51.02% and 62.93% of that of the sound teeth in all groups. Group I had significantly higher percentages of shear bond strength values (P < 0.05) when compared to group II and group III. No significant difference (P > 0.05) was found between group II and group III. Conclusion:The findings of the present study show that Er,Cr:YSGG laser irradiation prior to the reattachment of incisal fragments has a negative effect on fracture strength.

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“…Acid application dissolves the intertubular dentin too, thus destroying the chimney-like formations and widening the orifices of the dentinal tubules. Furthermore consecutive acid etching involves the problems of unpredictable depths of the demineralization zone [25] and a deficit in the diffusion depth of resin monomers [26].…”

Section: Discussionmentioning

confidence: 99%

Morphology of resin–dentin interfaces after Er,Cr:YSGG laser and acid etching preparation and application of different bonding systems

Beer¹,

Buchmair²,

Körpert³

et al. 2011

Lasers Med Sci

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The goal of this study was to show the modifications in the ultrastructure of the dentin surface morphology following different surface treatments. The stability of the adhesive compound with dentin after laser preparation compared with conventional preparation using different bonding agents was evaluated. An Er,Cr:YSGG laser and 36% phosphoric acid in combination with various bonding systems were used. A total of 100 caries-free human third molars were used in this study. Immediately after surgical removal teeth were cut using a band saw and 1-mm thick dentin slices were created starting at a distance of 4 mm from the cusp plane to ensure complete removal of the enamel. The discs were polished with silicon carbide paper into rectangular shapes to a size of 6 × 4 mm (±0,2 mm).The discs as well as the remaining teeth stumps were stored in 0.9% NaCl at room temperature. The specimens were divided into three main groups (group I laser group, group II etch group, group III laser and etch group) and each group was subdivided into three subgroups which were allocated to the different bonding systems (subgroup A Excite, subgroup B Scotchbond, subgroup C Syntac). Each disc and the corresponding tooth stump were treated in the same way. After preparation the bonding composite material was applied according to the manufacturers' guidelines in a hollow tube of 2 mm diameter to the disc as well as to the corresponding tooth stump. Shear bond strength testing and environmental scanning electron microscopy were used to assess the morphology and stability of the resin-dentin interface. The self-etching bonding system showed the highest and the most constant shear values in all three main groups, thus enabling etching with phosphoric acid after laser preparation to be avoided. Thus we conclude that laser preparation creates a surface texture that allows prediction of the quality of the restoration without the risk of negative influences during the following treatment steps. This can easily and repeatedly be achieved.

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Resin diffusion through demineralized dentin matrix

Cited by 19 publications

References 14 publications

Swelling equilibrium of dentin adhesive polymers formed on the water–adhesive phase boundary: Experiments and micromechanical model

Swelling equilibrium of dentin adhesive polymers formed on the water–adhesive phase boundary: Experiments and micromechanical model

Fracture Resistance of Incisal Fragments Following Reattachment With Different Techniques in Simulated Crown Fractures

Morphology of resin–dentin interfaces after Er,Cr:YSGG laser and acid etching preparation and application of different bonding systems

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