Morphological Alterations of the Surfaces of Enamel and Dentin of Deciduous Teeth Irradiated with Nd:YAG, C0(2)and Diode Lasers

Souza, Mônica Rodrigues de Araújo; Watanabe, Ii‐Sei; Azevedo, Luciane Hiramatsu; Tanji, E. Y.

doi:10.4067/s0717-95022009000200021

Cited by 12 publications

(13 citation statements)

References 14 publications

(14 reference statements)

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“…In this study, we found that 2 times laser irradiation had no significant effect on the suppression of the enamel microhardness reduction, which is in contrast to the results of 4 times irradiation in our study and 2 previous studies by Souza et al 32 and da Silva Barbosa et al 19 Souza et al 32 studied the effects of the CO2, Nd:YAG and diode lasers with 1.0 W power and 84.9 J/cm 3 energy on the enamel of deciduous human teeth via scanning electron microscope. They showed the formation of a melted and evenly resolidified enamel surface, suggesting an increase in the resistance of the dental enamel against acids.…”

Section: Discussioncontrasting

confidence: 99%

“…30,31 There are hardly any studies on the effects of the diode laser on the dental structure, especially using enamel microhardness. Indeed, to the best of our knowledge, only four previous studies investigated the effect of the diode laser on deciduous teeth 17,19,20,32 and only one of them studied the enamel microhardness changes either with or without fluoride application. 19 Thus, the effect of the diode laser on the ultrastructure of the enamel and its ability to reduce enamel microhardness loss after acid challenge is still controversial.…”

Section: Discussionmentioning

confidence: 99%

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Effects of Laser and Fluoride on the Prevention of Enamel Demineralization: An In Vitro Study

et al. 2018

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Introduction: Investigations have demonstrated that fluoride is an essential element in preventive dentistry. However, there are still controversies about the preventive effects of various kinds of laser. The aim of this study was to examine the effect of diode laser irradiation (810 nm) with or without fluoride therapy in the prevention of deciduous enamel demineralization. Methods: Sixty deciduous molar crowns were randomly assigned to 6 groups: C: received no treatment; F: fluoride varnish application; 2L: 2 times diode laser irradiation; 4L: 4 times diode laser irradiation; F2L: 2 times laser irradiation over fluoride varnish; F4L: 4 times laser irradiation over fluoride varnish. Teeth in all groups were subjected to a pH-cycling process to produce artificial caries-like lesions. Results: The analysis of variance (ANOVA) of microhardness values indicated a significant great effect for laser, fluoride, and the interaction of laser-fluoride on reducing the final microhardness value (P < 0.001). However, the 2L group was an exception. Despite the 4L group, it did not show a significant prevention of enamel microhardness loss (P = 0.125). These 2 groups exhibited different effects in the absence of fluoride (P 2L-4L = 0.05) while in the presence of the fluoride varnish, no statistically significant difference was observed between them (P F2L-F4L = 0.257). Moreover, no statistically significant difference was observed between the laser-fluoride combination group and the fluoride group (P F2L-F = 0.133, P F4L-F = 0.926). Conclusion: Our results suggest that fluoride varnish, diode laser, and their combination decrease the loss of the enamel microhardness value and potentially prevent deciduous enamel demineralization. However, the combination of laser and fluoride was not more effective than fluoride.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effects of Laser and Fluoride on the Prevention of Enamel Demineralization: An In Vitro Study

et al. 2018

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“…Scanning electron microscopy analysis revealed significant morphological alterations of the Nd:YAG diode (808 and 980 nm) and Er,Cr:YSGG laser-irradiated enamel surface, like melting and recrystallization, cracks and porosities (12,15,16). However, it is unclear whether those effects alter significantly the roughness of the dental enamel.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Surface Roughness and Bacterial Adhesion on Tooth Enamel Irradiated With High Intensity Lasers

et al. 2017

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The aim was to evaluate the surface roughness and bacterial adhesion on enamel irradiated with high intensity lasers, associated or not to a fluoride varnish. Eighty fragments of bovine enamel were equally divided in 8 groups (n=10). Group 1 was not treated and Group 2 received only a 5% fluoride varnish application. The other groups were irradiated with an Er:Cr:YSGG (8.92 J/cm 2 ), an Nd:YAG (84.9 J/cm 2 ) and a diode laser (199.04 J/cm 2 ), associated or not to a 5% fluoride varnish. The surface roughness was measured before and after treatments. Afterward, all samples were incubated in a suspension of S. mutans at 37 °C for 24 h. The colony-forming units (CFU) were counted by a stereoscope and the results were expressed in CFU/mm 2 . One-way ANOVA and the Tukey´s test compared the roughness data and the Student´s test compared the results obtained in the bacterial adhesion test (α=5%). The results showed that the irradiated samples without varnish presented the same roughness and the same bacterial adhesion that the non-irradiated samples. However, samples irradiated in the presence of fluoride varnish showed higher surface roughness and higher bacterial adhesion than the non-irradiated samples and those irradiated without varnish. Presence of pigments in the varnish increased the lasers' action on the enamel surface, which produced ablation in this hard tissue and significantly increased its surface roughness. For this reason, the enamel's susceptibility to bacterial adhesion was higher when the irradiation of the samples was made in presence of fluoride varnish.

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“…5,22,23 Laser desensitization is also a novel and efficient alternative for the immediate treatment of dentinal hypersensitivity. [24][25][26][27][28] Lasers are being investigated for the treatment of hypersensitivity as a monotherapy or in combination with desensitizing agents incorporated in toothpaste in regular use by patients. 17,[29][30][31] Presently there is no standard protocol of treatment for the same.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Evaluation of the Effectiveness of Three Different Modalities in Occluding Dentinal Tubules: An In Vitro Study

George

Muruppel

Sudeep

et al. 2019

The Journal of Contemporary Dental Practice

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Aim: This in vitro study was designed to evaluate and compare the effectiveness of a dentifrice containing 8% arginine and calcium carbonate, diode laser (810 nm) and the combined use of diode laser (810 nm) and the same dentifrice in occluding dentinal tubules. Materials and methods: Forty sectioned dentine discs were observed in this study. The Samples were randomly divided into 4 groups. In group A, a dentifrice containing arginine and calcium carbonate was applied. In group B, the specimens were subjected to diode laser (810 nm) irradiation. In group C, the same dentifrice was applied and the specimens were subjected to diode laser (810 nm) treatment. Group D was left untreated and served as the control. The specimens were observed under the scanning electron microscope. Then the photomicrographs of each specimen were taken which were uploaded into Photoshop 7®, and the diameters of the dentinal tubules of each specimen were measured and the data were analyzed statistically. Results: The overall comparison between different treatment modalities using one-way analysis of variance (ANOVA) and multiple comparisons of two modalities assessed using post hoc Tukey method revealed that there is a highly significant difference (p value = 0.0001) in the dentinal tubule diameter and rate of occlusion in different treatment modalities. Conclusion:The study concluded that all three treatment modalities caused significant occlusion of dentinal tubules. The combined use of desensitizing toothpaste and diode laser (810 nm) is the most effective, then comes the diode laser (810 nm) alone and finally the desensitizing toothpaste alone. Clinical significance: This study suggests an effective treatment of dentinal hypersensitivity using diode laser and desensitizing toothpaste.

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Morphological Alterations of the Surfaces of Enamel and Dentin of Deciduous Teeth Irradiated with Nd:YAG, C0(2)and Diode Lasers

Cited by 12 publications

References 14 publications

Effects of Laser and Fluoride on the Prevention of Enamel Demineralization: An In Vitro Study

Effects of Laser and Fluoride on the Prevention of Enamel Demineralization: An In Vitro Study

Evaluation of Surface Roughness and Bacterial Adhesion on Tooth Enamel Irradiated With High Intensity Lasers

A Comparative Evaluation of the Effectiveness of Three Different Modalities in Occluding Dentinal Tubules: An In Vitro Study

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