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Bond strength of bulk fill composite to teeth prepared with Er: YAG laser
Benati, Marcos Roberto de Lima; Baioni, Jean Carlos; Souza, Amanda Guerra Cavalcante de; Ferraz, Laura Nobre; Oliveira, Ana Luisa Botta Martins de; Vitti, Rafael Pino; Scatolin, Renata Siqueira.
Afiliação
  • Benati, Marcos Roberto de Lima; Herminio Ometto University Center. School of Dentistry. Araras. BR
  • Baioni, Jean Carlos; Herminio Ometto University Center. School of Dentistry. Araras. BR
  • Souza, Amanda Guerra Cavalcante de; University of Campinas. Piracicaba School of Dentistry. Piracicaba. BR
  • Ferraz, Laura Nobre; Herminio Ometto University Center. School of Dentistry. Araras. BR
  • Oliveira, Ana Luisa Botta Martins de; Herminio Ometto University Center. School of Dentistry. Araras. BR
  • Vitti, Rafael Pino; Herminio Ometto University Center. School of Dentistry. Araras. BR
  • Scatolin, Renata Siqueira; Herminio Ometto University Center. School of Dentistry. Araras. BR
Braz. j. oral sci ; 22: e238727, Jan.-Dec. 2023. ilus
Article em En | LILACS, BBO | ID: biblio-1413363
Biblioteca responsável: BR218.1
ABSTRACT

Aim:

The present in vitro study aimed to evaluate the bond strength of a bulk fill composite on dentin surfaces prepared with the Er YAG laser.

Methods:

Twenty-four permanent third molars were selected and divided into 2 groups CP - Conventional preparation with high-speed handpiece (control) and LA (laser) - Preparation with Er YAG laser. The occlusal surface was removed to expose coronal dentin, which was subsequently prepared with a high-speed handpiece or Er YAG laser (350mJ, 4Hz, 1.5 ml/min water flow). Both groups were restored with Filtek One Bulk Fill (3M ESPE) composite resin. After 24 hours, the samples were evaluated for microtensile bond strength (µTBS), fracture pattern, and scanning electron microscopy (SEM).

Results:

The data obtained in the µTBS test were submitted to t-test (α=0.05). The results showed no difference in µTBS when the different types of cavity preparation were compared (ρ=0.091). Fracture patterns revealed the prevalence of cohesive fracture in composite resin in CP (83.3%) and adhesive fracture in LA (92.1%). In the SEM analysis, the LA group demonstrated the presence of gaps between the composite resin and the irradiated dentin surface. The hybrid layer exhibited more regularity with the presence of longer and uniform resin tags in the CP group.

Conclusion:

The type of cavity preparation did not influence the values of bulk fill composite resin µTBS to dentin. Fracture patterns and scanning electron microscopy analyses suggested less interference at the adhesive interface in preparations performed using CP
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Texto completo: 1 Índice: LILACS Assunto principal: Adesividade / Resinas Compostas / Materiais Dentários / Lasers de Estado Sólido Tipo de estudo: Risk_factors_studies Idioma: En Revista: Braz. j. oral sci Assunto da revista: ODONTOLOGIA Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Índice: LILACS Assunto principal: Adesividade / Resinas Compostas / Materiais Dentários / Lasers de Estado Sólido Tipo de estudo: Risk_factors_studies Idioma: En Revista: Braz. j. oral sci Assunto da revista: ODONTOLOGIA Ano de publicação: 2023 Tipo de documento: Article