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A modified Er,Cr:YSGG laser protocol associated with fluoride gel for controlling dentin erosion

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Abstract

Propose

Effective strategies to control the development of dental erosion are still needed. This study evaluated the effect of associating a modified Er,Cr:YSGG laser protocol with topical fluoride application on dentin erosion.

Methods

Sound and eroded dentin specimens (n = 10/substrate) were allocated into groups: control (no treatment); APF gel (1.23% F-, for 1 min, one application, removed with cotton roll); Er,Cr:YSGG laser P1 [0.25W, 20Hz, ≅ 6.5 J/cm2, 2 mm away from the surface, two irradiation of 10 s each, with sweeping movements, under 25% air, without water, with a sapphire tip measuring 750 μm in diameter and with of 6 mm (S75)]; Er,Cr:YSGG laser P2 (same settings with P1 except 1 mm away from the surface and ≅ 8.3 J/cm2); APF gel before Er,Cr:YSGG laser P1; APF gel before Er,Cr:YSGG laser P2. Specimens underwent a 5-day erosion-remineralization cycling. Erosion depth (surface loss — SL) was determined. Environmental scanning electron microscopy images (n = 2) were obtained. Data were statistically analyzed (α = 0.05).

Results

Sound substrate: APF gel presented lowest SL, differing significantly from control and other groups. Laser P1 and P2 had highest SL. Eroded substrate: laser P1 showed highest SL, differing significantly from all other groups. For the control, APF gel, and laser P1, the eroded substrates had significantly higher SL than the sound. For laser P2, SL from sound specimens was higher than the eroded. Melted areas were observed in the laser-treated groups.

Conclusions

Modified Er,Cr:YSGG laser parameter was unable to control progression of dentin erosion, not even when it was combined with fluoride.

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Acknowledgements

The authors would like to thank the (FAPESP grant #2017/24714-3) for the scholarship provided for the first author of this manuscript and Foundation of the University of São Paulo, School of Dentistry (FFO Fundecto – PIBIC grant #001/2019) for the scholarship provided for the second author of this manuscript. The authors also would like to express their gratitude to DDS, MSc Diana Pereira Grandizoli for the assistance in the environmental scanning electron microscopic analyses.

Funding

This study is funded by the Foundation of the University of São Paulo, School of Dentistry (FFO Fundecto – PIBIC grant #001/2019) and São Paulo Research Foundation (FAPESP grant #2017/24714-3)

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Authors and Affiliations

  1. Department of Restorative Dentistry, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil

    Alana Cristina Machado, Géssica Trevizan Confortini, Ítallo Emídio Lira Viana, Laís Gatti de Souza Pereira & Taís Scaramucci

  2. Institute of Energetic and Nuclear Research, IPEN/CNEN/SP, São Paulo, SP, 05508-000, Brazil

    Daísa de Lima Pereira & Denise Maria Zezell

  3. Special Laboratory of Lasers in Dentistry (LELO), Department of Restorative Dentistry, School of Dentistry, São Paulo, SP, 05508-000, Brazil

    Ana Cecília Corrêa Aranha

Authors
  1. Alana Cristina Machado
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  2. Géssica Trevizan Confortini
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  3. Ítallo Emídio Lira Viana
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  5. Daísa de Lima Pereira
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  6. Denise Maria Zezell
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  7. Ana Cecília Corrêa Aranha
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  8. Taís Scaramucci
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Contributions

Alana Cristina Machado: conception and design of the study, profilometer analysis and manuscript drafting

Géssica Trevizan Confortini: preparation of specimens and cycling

Ítallo Emídio Lira Viana Profilometer: analysis and manuscript review

Laís Gatti de Souza Pereira: preparation of specimens and cycling

Daísa de Lima Pereira: laser irradiation

Denise Maria Zezell: laser irradiation and manuscript review

Ana Cecília Corrêa Aranha: manuscript final review

Taís Scaramucci: conception and design of the study, data analysis, and manuscript final review

Corresponding author

Correspondence to Taís Scaramucci.

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Machado, .C., Confortini, G.T., Viana, Í.E.L. et al. A modified Er,Cr:YSGG laser protocol associated with fluoride gel for controlling dentin erosion. Laser Dent Sci 5, 177–183 (2021). https://doi.org/10.1007/s41547-021-00133-y

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  • DOI: https://doi.org/10.1007/s41547-021-00133-y

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