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Fluoride uptake and acid resistance of enamel irradiated with Er:YAG laser

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Abstract

This study evaluated the resistance to demineralization and fluoride incorporation of enamel irradiated with Er:YAG. A total of 110 bovine teeth were selected and divided into eight groups: unlased, 37% phosphoric acid, and samples irradiated with the Er:YAG laser at several fluences (31.84 J/cm2, 25.47 J/cm2, 19.10 J/cm2, 2.08 J/cm2, 1.8 J/cm2, and 0.9 J/cm2). The application of acidulated phosphate fluoride was performed after treatments. All samples were immersed in 2 ml of 2.0 M acetic–acetate acid solution at pH 4.5 for 8 h, and fluoride, calcium, and phosphorus ions dissolved were analyzed by atomic absorption spectrometry and spectrophotometry. The phosphoric acid and 31.84 J/cm2 groups presented the lowest dissolution of calcium and phosphorus ions. Higher fluoride incorporation was observed on 1.8 J/cm2 and 0.9 J/cm2 groups. Based on these results, Er:YAG laser was able to decrease acid dissolution and increase fluoride uptake and can be a promissory alternative for preventive dentistry.

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Acknowledgment

The authors thank Opus Dent (Lumenis, Israel) for the concession of the Opus 20 equipment to LELO–FOUSP.

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Authors and Affiliations

  1. Laboratório Especial de Laser em Odontologia (LELO), Faculdade de Odontologia, Universidade de São Paulo, Av. Prof. Lineu Prestes, 2227, CEP 05508-000, São Paulo, Brazil

    Flávia M. Bevilácqua & Carlos de Paula Eduardo

  2. Centro de Lasers e Aplicações–Laboratório de Biofotônica, Instituto de Pesquisas Energéticas e Nucleares, Cidade Universitária, Av. Prof. Lineu Prestes, 2242, CEP 05508-000, São Paulo, Brazil

    Denise Maria Zezell & Patricia A. da Ana

  3. Instituto de Química, UNESP, Rua Francisco Degni s/n, CEP 14800-900, Araraquara, Brazil

    Romeu Magnani

Authors
  1. Flávia M. Bevilácqua
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  2. Denise Maria Zezell
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  3. Romeu Magnani
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  4. Patricia A. da Ana
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  5. Carlos de Paula Eduardo
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Correspondence to Denise Maria Zezell.

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Bevilácqua, F.M., Zezell, D.M., Magnani, R. et al. Fluoride uptake and acid resistance of enamel irradiated with Er:YAG laser. Lasers Med Sci 23, 141–147 (2008). https://doi.org/10.1007/s10103-007-0466-6

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  • DOI: https://doi.org/10.1007/s10103-007-0466-6

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