Effect of Nd:YAG laser combined with fluoride on the prevention of primary tooth enamel demineralization

Azevedo, Danielle Torres; Faraoni, Juliana Jendiroba; Derceli, Juliana dos Reis; Palma-Dibb, Regina Guenka

doi:10.1590/s0103-64402012000200003

Cited by 47 publications

(51 citation statements)

References 19 publications

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“…Irradiation of dental enamel with high power lasers has shown to be effective in preventing dental caries, because they can provide significant reduction in mineral loss by the acid challenges in the oral cavity (1,2). Different hypotheses have been proposed to explain the changes promoted by irradiation in dental enamel resulting in a preventive effect.…”

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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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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“…In most previous studies, WSLs were not present on the teeth surfaces in the first place and incipient caries were later induced artificially via demineralization and remineralization cycles. [11][12][13]18,20,21,30,33 The current study results showed that in the nointervention control group, where the samples were only immersed in artificial saliva, no change occurred …”

Section: Discussionmentioning

confidence: 90%

“…Moreover, the samples were initially sound and were then subjected to demineralization/ remineralization cycles. 33 Tagliaferro et al assessed primary enamel resistance to demineralization by the Knoop microhardness test. The enamel resistance in groups treated with laser and/or APF was higher compared to the control group, and combined application of laser and fluoride caused no significant change in the results compared to other interventions, which is similar to the current study results.…”

Section: G1 G2 G3mentioning

confidence: 99%

In Vitro Comparison Of Fluoride Gel Alone and in Combination With Er,Cr:YSGG Laser on Reducing White Spot Lesions in Primary Teeth

Molaasadollah

Asnaashari

Abbas³

et al. 2017

J Lasers Med Sci

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Introduction: Laser therapy has been suggested as a method for caries-prevention, and ErCr:YSGG laser is increasingly used in dentistry. This study aimed to compare the efficacy of fluoride gel alone and in conjunction with Er,Cr:YSGG laser for remineralization of white spot lesions (WSLs) in primary teeth. Methods: This study was conducted on 20 primary teeth with WSLs extracted for orthodontic reasons. Three sections were made of each tooth at the site of WSLs. The surface area of WSLs was measured under a stereomicroscope at ×25 magnification. Samples were assigned to 3 groups of control (group 1), exposure to 1.23% APF gel for 4 minutes (group 2) and Er,Cr:YSGG laser (0.5 W power, 20 Hz frequency, 60% water, 40% air, pulse duration of 5±1 seconds) plus fluoride (group 3). All samples were stored in artificial saliva for 10 days and then the surface area of the WSLs was measured again under a stereomicroscope. Data were analyzed using the Kruskal-Wallis, MannWhitney and Wilcoxon signed rank tests. Results:The reduction in surface area of the WSLs was significantly different between the control and fluoride (P < 0.001) and also the control and laser plus fluoride groups (P < 0.001); the difference between fluoride and laser plus fluoride groups was not significant (P = 0.265).Comparison of the surface area of WSLs before and after the intervention showed no significant difference in group one (P = 0.737) while this difference in groups 2 (P < 0.001) and 3 (P < 0.001) was statistically significant. Conclusion:The results showed that Er,Cr:YSGG laser irradiation plus 1.23% APF gel was not significantly different from the application of fluoride gel alone in enhancing the remineralization of WSLs.

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“…There are studies which were performed on the synergistic effect of laser irradiation and fluoride or other remineralizing agents on remineralization (23,24). Most of these studies have been conducted on permanent teeth and have primarily assessed mineral loss, fluoride content and surface topography of enamel following laser irradiation.…”

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The Effect of Laser Irradiation on Shear Bond Strength of GI to Dentin After CPP-ACP Treatment

Moezizadeh¹,

Sheikh-Al-Eslamian²

2016

Avicenna J Dent Res

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Background: Dentin sensitivity is one of the most important problems in dentistry. Enamel loss due to root exposure is serious issue and common exposure is one of the reasons for dentin hypersensitivity. There are different methods for solving this problem. One of the most conservative and least expensive methods is use of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) paste. Objectives: The aim of this study was to evaluate shear bond strength of GIC to dentin, with or without laser, CPP-ACP paste and polyacrylic acid treatments. Materials and Methods: Fifty sound human third molars were bisected in a mesiodistal direction using a diamond disk. Using 400, 600 and 800 grit silicon carbide paper, dentin surfaces were exposed. The teeth were divided into five groups. In groups A, B, D and H, CPP-ACP (GC tooth mousse Itabashi-Ku, Tokyo, Japan) was applied for one hour the first day and repeated at the same time of day for a total of five days. In groups B, C, D and E, the specimens were subjected to laser for 10 seconds using Er, Cr: YSGG laser. In groups B, C, H and G, specimens were treated with 10% polyacrylic acid for 20 seconds. A plastic tube containing GI was positioned over the tooth. Samples were loaded in shear bond using a Universal Testing Machine (Zwick/Roell, Germany), at a 0.5 mm/minute crosshead speed. Results: Despite the failing of groups A and D, group analysis showed that there were no significant differences between the groups. The predominant type of fracture in all groups was adhesive. Conclusions: Application of CPP-ACP, without preconditioning with polyacrylic acid, can decrease shear bond strength. Laser irradiation has no effect on shear bond strength of GIC to dentin in this condition.

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Effect of Nd:YAG laser combined with fluoride on the prevention of primary tooth enamel demineralization

Cited by 47 publications

References 19 publications

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

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

In Vitro Comparison Of Fluoride Gel Alone and in Combination With Er,Cr:YSGG Laser on Reducing White Spot Lesions in Primary Teeth

The Effect of Laser Irradiation on Shear Bond Strength of GI to Dentin After CPP-ACP Treatment

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