Morphological changes produced by acid dissolution in Er:YAG laser irradiated dental enamel

Díaz-Monroy, Jennifer Manuela; Contreras‐Bulnes, Rosalía; Olea-Mejía, Oscar; Rodríguez‐Vilchis, Laura Emma; Sánchez-Flores, Ignacio

doi:10.1002/jemt.22360

Cited by 7 publications

(6 citation statements)

References 25 publications

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“…Demineralized enamel and dentin have low mechanical properties, and they are more prone to wear and abrasion. This agrees with a study by Díaz-Monroy et al [ 15 ] who reported that the dissolution rate of enamel decreases with the treatment of the enamel with fluorine or zinc ions, with the dissolution of enamel surfaces being imminent after a period. Another study analyzed the morphological changes produced by acid dissolution of the enamel irradiated with laser, considering that morphological modifications can vary depending on the unwanted effects induced by laser irradiation.…”

Section: Discussionsupporting

confidence: 93%

Assessment of structural changes in translucency and opacity of tooth enamel against a direct demineralization process: An in vitro study

Ruiz

Soriano

Gallo

et al. 2020

J Int Soc Prevent Communit Dent

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A BSTRACT Objective: The objective of this study was to assess in vitro the structural changes in translucency and opacity of tooth enamel following a direct demineralization process. Materials and Methods: This experimental in vitro study evaluated 45 thirds (cervical, middle, and occlusal) of the tooth enamel surface of premolar teeth extracted from young adults divided into three groups of 15 specimens each: Group 1 (solution based on calcium, phosphorus, and fluorine), Group 2 (orthophosphoric acid 37%), and control group (distilled water). All underwent optical macroscopic examination with ×3 magnification to determine the initial translucency according to the variation of the medium in their intercrystalline spaces, and Thylstrup and Fejerskov Index was used. The experimental groups were then subjected to an artificial caries process during which the specimens were placed in an inorganic and organic solution of calcium, phosphorus, and fluorine at 37°C for 90 days with the acidic solution at pH 5 and the neutral solution at pH 7. The control specimens were placed in distilled water. Finally, all the specimens were assessed by polarization microscopy. Results: In relation to the occlusal third, the highest proportion in Groups 1 and 2 was in Grades 2 and 3 (80%). A significant association was only observed between the experimental groups in the degree of translucency in the occlusal third ( P = 0.002), whereas no association was found in relation to the degree of opacity in the middle and cervical thirds in either study group ( P > 0.05). Conclusion: The resistance of enamel hydroxyapatite crystals increases from occlusal to cervical due to the greater presence of aprismatic enamel in the cervical horizontal third.

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Section: Discussionsupporting

confidence: 93%

Assessment of structural changes in translucency and opacity of tooth enamel against a direct demineralization process: An in vitro study

Ruiz

Soriano

Gallo

et al. 2020

J Int Soc Prevent Communit Dent

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“…For XP Bond adhesive, the phosphoric acid etching may cause the detachment of more ablated dentinal structures, which were seen incorporated by the adhesive layer (Figure 3c-f). On the other hand, the acid etching applied to ablated dentin was not able to remove the peritubular dentin (Figure 3c,e,f), because the alterations promoted by the Er:YAG laser on the mineral content may have created resistance against acid attack (Bevilácqua et al, 2008;Díaz-Monroy et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Influence of Er:YAG laser irradiation settings on dentin‐adhesive interfacial ultramorphology and dentin bond strength

Vermelho

Freitas

Reis

et al. 2022

Microscopy Res & Technique

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This study evaluated the effects of Erbium-doped yttrium aluminium garnet (Er: YAG) laser settings and dentin bonding agents on ultramorphological characteristics of resin-laser-irradiated dentin interfaces and dentin bond strength (BS) of these adhesive systems. Additionally, dentin depth affected by Er:YAG laser irradiations was measured. The experiments were performed on occlusal dentin surfaces of third molars that were flattened with 600-grit SiC sandpaper. Treateddentin with laser settings (250 mJ/4 Hz and 160 mJ/10 Hz) were the experimental groups, while SiC abraded dentin was the control. These three dentin treatments and three adhesives (two self-etchings and one etch-&-rinse adhesive) formed nine groups for the ultramorphology of laser-ablated dentin-adhesives interfacial analysis, using a transmission electron microscope (TEM). For BS (n = 8), the same nine groups were tested with addition of the two evaluation times (24 h after sample preparation or 1 year). The depths of Er:YAG laser effects into the dentin were measured using a TEM (n = 10). Ablated-dentin depth and BS data were analyzed by one-and three-way ANOVA, respectively, and Tukey's test (α = 0.05). Hybrid layer formation was only observed for controls, while for laser-treated dentin, adhesives were bonded to dentin with resin tags formation.

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“…Zamudio-Ortega et al [11] reported morphological changes from mild to severe on Er:YAG laser irradiated enamel of primary teeth, according to the employed energy densities and applied protocol, and concluded that the Er:YAG energy density influenced chemical changes in the enamel to enhance its structural mineral content. Furthermore, irradiation effects such as exposed enamel prisms, rough surfaces, craters, fractures, melting, recrystallization, or even carbonization have been reported by several authors [11,19].…”

Section: Introductionmentioning

confidence: 96%

“…In the dental literature, there are many studies about the effects of different local and general factors on the human dental enamel microstructure such as: age-related changes [1], the consumption of various beverages [2][3][4][5], toothpastes [6][7][8], toothbrushing [5,8,9], fluoride [10,11], bleaching [12][13][14][15], conventional etching [16], laser etching [17], laser irradiation [11,[18][19][20], biological factors such as saliva and acquired pellicle [9,21], developmental defects of the enamel [22][23][24][25],…”

Section: Introductionmentioning

confidence: 99%

“…Prior to irradiation, the human dental enamel surface presents particular features of this tissue (closed prism areas) and other characteristics that could be produced in the oral environment such as exposed prism areas and natural fractures. Morphological changes, from mild to severe, produced by the acid dissolution of irradiated enamel has been specifically observed on laser-induced undesired effects [19]. Zamudio-Ortega et al [11] reported morphological changes from mild to severe on Er:YAG laser irradiated enamel of primary teeth, according to the employed energy densities and applied protocol, and concluded that the Er:YAG energy density influenced chemical changes in the enamel to enhance its structural mineral content.…”

Section: Introductionmentioning

confidence: 99%

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Surface nanomorphology of human dental enamel irradiated with an Er:YAG laser

et al. 2015

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To determine the effects of Er:YAG laser irradiation on the surface nanomorphology of human dental enamel.Materials and methods: five samples of human dental enamel were divided into five groups: (a) I and II were irradiated with Er:YAG & water irrigation (12.7 J cm −2 and 25.5 J cm −2 , respectively); (b) III and IV were Er:YAG laser irradiated & no water irrigation (12.7 J cm −2 and 25.5 J cm −2 , respectively); (c) V or control (no laser irradiation). Nanomorphological changes were observed on 1 μm × 1 μm areas by AFM (contact mode and air). The partition functions and multifractal spectra were calculated.The graphical results showed that the larger the spectrum width Δα (Δα = α max − α min ) of the multifractal spectra f(α) the more non-uniform the surface nanomorphology. One way analysis of variance (ANOVA) was performed (P < 0.05) to distinguish significant differences between the groups.All the investigated surfaces exhibited multifractal behavior. The computational algorithm indicated that the multifractal spectra differ significantly from each other for the different groups. AFM (atomic force microscopy), the statistical surface roughness parameters, and multifractal analysis provided useful information about the surface nanomorphology and optimal surface characteristics. This approach could be extended to other enamel surfaces in order to characterize its structural 3D microrelief.

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Morphological changes produced by acid dissolution in Er:YAG laser irradiated dental enamel

Cited by 7 publications

References 25 publications

Assessment of structural changes in translucency and opacity of tooth enamel against a direct demineralization process: An in vitro study

Assessment of structural changes in translucency and opacity of tooth enamel against a direct demineralization process: An in vitro study

Influence of Er:YAG laser irradiation settings on dentin‐adhesive interfacial ultramorphology and dentin bond strength

Surface nanomorphology of human dental enamel irradiated with an Er:YAG laser

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