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Association of Nd: YAG laser and calcium-phosphate desensitizing pastes on dentin permeability and tubule occlusion
Maximiano, Vinícius; Machado, Alana Cristina; Lopes, Raquel Marianna; Rabelo, Fernanda Ellen Mercatelli; Garófalo, Stephanie Assimakopoulos; Zezell, Denise Maria; Aranha, Ana Cecilia Corrêa; Scaramucci, Taís.
  • Maximiano, Vinícius; Universidade de São Paulo. Faculdade de Odontologia. Departamento de Dentística. São Paulo. BR
  • Machado, Alana Cristina; Universidade de São Paulo. Faculdade de Odontologia. Departamento de Dentística. São Paulo. BR
  • Lopes, Raquel Marianna; Universidade de São Paulo. Faculdade de Odontologia. Departamento de Dentística. São Paulo. BR
  • Rabelo, Fernanda Ellen Mercatelli; Universidade de São Paulo. Faculdade de Odontologia. Departamento de Dentística. São Paulo. BR
  • Garófalo, Stephanie Assimakopoulos; Universidade de São Paulo. Faculdade de Odontologia. Departamento de Dentística. São Paulo. BR
  • Zezell, Denise Maria; Universidade de São Paulo. Instituto de Pesquisas Energéticas e Nucleares. São Paulo. BR
  • Aranha, Ana Cecilia Corrêa; s.af
  • Scaramucci, Taís; s.af
J. appl. oral sci ; 29: e20200736, 2021. graf
Article in English | LILACS | ID: biblio-1180797
ABSTRACT
Abstract Objective To evaluate the efficacy of NdYAG laser associated with calcium-phosphate desensitizing pastes on dentin permeability and tubule occlusion after erosive/abrasive challenges. Methodology Dentin specimens were exposed to 17% ethylene diamine tetra-acetic acid (EDTA) solution for 5 min and randomly allocated into five groups G1, control (no treatment); G2, NdYAG laser (1 W, 10 Hz, 100 mJ, 85 J/cm2); G3, Laser + TeethmateTM Desensitizer; G4, Laser + Desensibilize Nano P; and G5, Laser+Nupro®. Specimens underwent a 5-day erosion-abrasion cycling. Hydraulic conductance was measured post-EDTA, post-treatment, and post-cycling. Post-treatment and post-cycling permeability (%Lp) was calculated based on post-EDTA measurements, considered 100%. Open dentin tubules (ODT) were calculated at the abovementioned experimental moments using scanning electron microscopy and ImageJ software (n=10). Data were analyzed using two-way repeated measures ANOVA and Tukey's test (α=0.05). Results G1 presented the highest %Lp post-treatment of all groups (p<0.05), without significantly differences among them. At post-cycling, %Lp significantly decreased in G1, showed no significant differences from post-treatment in G3 and G4, and increased in G2 and G5, without significant differences from G1 (p>0.05). We found no significant differences in ODT among groups (p>0.05) post-EDTA. At post-treatment, treated groups did not differ from each other, but presented lower ODT than G1 (p<0.001). As for post-cycling, we verified no differences among groups (p>0.05), although ODT was significantly lower for all groups when compared to post-EDTA values (p<0.001). Conclusion All treatments effectively reduced dentin permeability and promoted tubule occlusion after application. Combining Nd YAG laser with calcium-phosphate pastes did not improve the laser effect. After erosive-abrasive challenges, treatments presented no differences when compared to the control.
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Full text: Available Index: LILACS (Americas) Main subject: Lasers, Solid-State / Dentin Desensitizing Agents Type of study: Risk factors Language: English Journal: J. appl. oral sci Journal subject: Dentistry Year: 2021 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade de São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Lasers, Solid-State / Dentin Desensitizing Agents Type of study: Risk factors Language: English Journal: J. appl. oral sci Journal subject: Dentistry Year: 2021 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade de São Paulo/BR