Application of Er,Cr:YSGG laser versus photopolymerization after silver diamine fluoride in primary teeth

Mohamed Hassan,Rasha Alsheikh,Eman Bakhurji

doi:10.1038/s41598-021-00204-x

Mohamed Hassan, Rasha Alsheikh + Show 1 more

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https://doi.org/10.1038/s41598-021-00204-x

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Abstract

Examine the effect of dental curing light and laser treatments applied after Silver Diamine Fluoride (SDF) on dentin hardness in carious primary molars. This in-vitro study consisted of 30 extracted primary molars with caries extending into dentin without pulpal involvement. The collected teeth were randomly divided into three groups: group 1: received SDF then Sub-ablative low-energy of Er,Cr:YSGG laser, group 2: received SDF followed by application of curing light for 40 s, group 3: had SDF treatment only. In all groups, 38% Ag (NH3)2F SDF was used. Vickers hardness test was performed on sound dentin below carious lesion. Kruskal–Wallis Test was used to determine the mean difference in dentin hardness of the groups at 5% Significance level using SPSS software. Surface hardness of sound dentin below the carious lesion was statistically significantly higher in the laser + SDF group (891.24 ± 37.33 kgf/mm2) versus the two other groups (Light cure + SDF = 266.65 ± 90.81 kgf/mm2 and SDF only = 117.91 ± 19.19 kgf/mm2) with p-value ≤ 0.001. Although Photopolymerization of SDF increases the surface hardness of sound dentin below the carious lesion, applying laser after SDF has the highest surface hardness due to the laser’s sub-ablation of dentin.

Highlights

Examine the effect of dental curing light and laser treatments applied after Silver Diamine Fluoride (SDF) on dentin hardness in carious primary molars
The CO2, Er:YAG and the Er:Cr:YSGG lasers have a high affinity to be absorbed by water and hydroxyapatite, when comparaing four different lasers, Mei et al reported higher fluoride uptake in the CO2 and Er:YAG SDF treated dentin groups when compared to the diode and Nd:YAG laser g roups[24]
The action of SDF on carious lesion is still under investigation, it is widely believed that the antibacterial action of silver helps arrest the further progression of the carious lesion while the fluoride helps to remineralize the tooth structure

Summary

Introduction

Examine the effect of dental curing light and laser treatments applied after Silver Diamine Fluoride (SDF) on dentin hardness in carious primary molars. The authors attributed the increased resistance to intrinsic changes in the enamel structure caused by the carbon dioxide laser irradiation followed by SDF application. They further reported less bacterial adhesion to the laser treated e namel[18]. The CO2, Er:YAG and the Er:Cr:YSGG lasers have a high affinity to be absorbed by water and hydroxyapatite, when comparaing four different lasers, Mei et al reported higher fluoride uptake in the CO2 and Er:YAG SDF treated dentin groups when compared to the diode and Nd:YAG laser g roups[24]

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