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. 2023 Mar 1;15(3):e225-e232.
doi: 10.4317/jced.60023. eCollection 2023 Mar.

Preventive effect of combined Er, Cr: YSGG and fluoride gel on acid resistance of the permanent tooth enamel: An in vitro study

Dhuha-Najm Abdulhussein  1 , Aseel-Haidar M J Al Haidar  1
Affiliations

Preventive effect of combined Er, Cr: YSGG and fluoride gel on acid resistance of the permanent tooth enamel: An in vitro study

Dhuha-Najm Abdulhussein et al. J Clin Exp Dent. .

Abstract

Background: Increasing the resistance of enamel to acids may prevent dental erosion and diminish microhardness alterations in the enamel. This study aimed to evaluate the preventive effect of erbium, chromium: yttrium, scandium, gallium, and garnet laser combined with 1.23% acidulated phosphate fluoride gel on enamel resistance to demineralization.

Material and methods: Thirty-four human maxillary first premolars were randomly assigned to three groups. Group I (control group), group II were treated with fluoride gel for 4-minutes and group III received ten seconds of laser treatment; then fluoride has applied. Each sample was immersed in a soft drink for 2 minutes, then washed and kept in deionized water. Four consecutive cycles were carried out at 6 hours intervals. The effects were studied utilizing the Vickers microhardness test and scanning electron microscopy. Data analyses were performed by Levene test and General Linear Model Repeated Measure Factorial ANOVA with Bonferonni post hoc test, the accepted level of significance was 0.05.

Results: Microhardness was increased statistically in groups II and III after treatment, with the highest value for group III. After demineralization, the control group had the lowest microhardness score, followed by group II and group III, which showed the least reduction in microhardness with a statistical significance (p<0.05). There was a correlation between the morphological alterations in enamel surfaces and the increased enamel resistance.

Conclusions: Both fluoride and the combined laser fluoride treatment had an advantage in protecting the enamel and increasing enamel resistance to acids, with a more significant benefit for the combined laser fluoride group. Key words:Prevention, Er, Cr: YSGG, enamel demineralization, fluoride, microhardness.

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Conflict of interest statement

Conflicts of interest The authors report there are no conflicts of interest.

Figures

Figure 1
Figure 1
Scanning electron micrograph of the sound enamel surface. Magnification 100 (A), 1000 (B), and 2000 (C).
Figure 2
Figure 2
Scanning electron micrograph of the control enamel surface. Magnification 100 (A), 1000 (B), and 2000 (C).
Figure 3
Figure 3
Scanning electron micrograph of the enamel surface treated with 1.23% APF. Magnification 100 (A), 1000 (B), and 2000 (C).
Figure 4
Figure 4
Scanning electron micrograph of the enamel surface treated with Er, Cr: YSGG laser and 1.23% APF. Magnification 100 (A), 1000 (B), and 2000 (C).
See this image and copyright information in PMC

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