Influence of Er:YAG and ND:YAG laser irradiation and fluoride application on surface roughness and dentin surface wear after erosive challenge: an in vitro study

• Natyelle-Fernanda-Silva-Bellocchio Corrêa ^[2] ; Regina-Guenka-Palma Dibb ^[1] ; Vinicius-Rangel Geraldo-Martins ^[2] ; Isabela-Ribeiro Madalena ^[3] ; Juliana-Jendiroba Faraoni ^[1] ; Maria-Angelica-Hueb-de Menezes Oliveira ^[2] ; Denise-Tornavoi de Castro ^[2] ; Cesar-Penazzo Lepri ^[2]
  1. [1] Universidade de São Paulo

     Universidade de São Paulo

     Brasil

     
  2. [2] Department of Biomaterials, University of Uberaba, Uberaba, MG, Brazil
  3. [3] Department of Biomaterials, University of Uberaba, Uberaba, MG, Brazil; School of Dentistry, Presidente Tancredo de Almeida Neves University Center, São João del Rei, MG, Brazil

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• Localización: Journal of Clinical and Experimental Dentistry, ISSN-e 1989-5488, Vol. 16, Nº. 3 (March), 2024, págs. 276-281
• Idioma: inglés
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• Resumen

  • To evaluate the effectiveness of Er:YAG and Nd:YAG laser on dentin hypersensitivity prevention, associated or not to acidulated phosphate fluoride (APF) after erosive challenge.

    104 specimens were obtained from bovine dentine and divided into groups (n=13): G1: Er:YAG; G2: Er:YAG followed by application of APF; G3: application of APF followed by Er:YAG, simultaneously; G4: Nd:YAG; G5: Nd:YAG followed by application of APF; G6: application of APF followed by Nd:YAG, simultaneously; G7:application of APF; G8: untreated. The parameters for Er:YAG were:10s, distance of 4mm, water cooling flow of 2mL/min, 2Hz, 3.92J/cm2. For the Nd:YAG: 10s, distance of 1mm, without cooling, 10Hz, 70.7J/cm2. The erosive drink was a cola at 4°C, 3×/day for 1 minute, for 5 days. Roughness and wear analysis were done in confocal laser microscope. Data were statistically analyzed (α=0.05).

    As regards roughness, there was no statistically difference among the groups. The groups irradiated with Er:YAG had a volume loss lower. G6 showed higher values than the groups irradiated with Er:YAG and lower than the other groups. The other groups irradiated with Nd:YAG showed similar wear results to the control.

    The Er:YAG laser showed the lowest volume loss from wear analysis, suggesting the increased the acid resistance of dentin.