Microtensile Bond Strength, Bonding Interface Morphology, Adhesive Resin Infiltration, and Marginal Adaptation of Bulk-fill Composites Placed Using Different Adhesives

Autor(es)

Sebold, Maicon ^[1] ; Esteves Lins, Rodrigo Barros ^[2] ; Sahadi, Beatriz Ometto ^[1] ; Santi, Marina Rodrigues ^[1] ; Marcondes Martins, Luis Roberto ^[1] ; Giannini, Marcelo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Restorat Dent, Operat Dent Div, Piracicaba Dent Sch, Ave Limeira 901, BR-13414903 Piracicaba, SP - Brazil

^[2] Paraiba State Univ, Ctr Sci Technol & Hlth, Dent Course, Araruna, PB - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Adhesive Dentistry; v. 23, n. 5, p. 409-420, SEP-OCT 2021.
• Citações Web of Science: 0

Resumo

Purpose: This study evaluated dentin bond strength, failure mode, interface morphology, adhesive infiltration into dentin, and marginal adaptation of bulk-fill composites used with different adhesives. Materials and Methods: Third molars received occlusal class I cavities (4 mm x 4 mm x 4 mm) that were bulk-filled with Admira Fusion x-tra (Voco) or SonicFill 2 (Kerr) using four adhesives (Scotchbond Multipurpose, 3M Oral Care; Clearfil SE Bond, Kuraray Noritake; OptiBond All-In-One, Kerr; Futurabond U, Voco). Scotchbond was used with acid etching, while the remaining adhesives were applied in self-etch mode. Sixty-four teeth were selected for the micro tensile bond strength test (n = 8). Failure modes were analyzed with scanning electron microscopy (SEM). Interface morphology and adhesive infiltration (n = 3) were investigated using confocal laser scanning microscopy (CLSM). Marginal adaptation (n = 3) was also evaluated using SEM. Bond strength, failure mode, and adhesive infiltration data were analyzed for distribution and homocedasticity, followed by appropriate statistical analyses (a = 0.05). Results: Regarding bond strength, no differences were found among adhesives for SonicFill; Clearfil showed a significantly lower mean value than did Scotchbond (p < 0.05) for Admira; the two composites did not differ. Adhesive and mixed failures were observed for all groups. Scotchbond led to thicker hybrid layers with deeper adhesive infiltration as opposed to Futurabond. The groups Admira+Futurabond, SonicFill+Clearfil, and SonicFill+Futurabond presented the highest marginal discontinuity. Conclusion: The tested bulk-fill composites did not affect dentin bonding. Scotchbond and Clearfil seem to be reliable for bonding SonicFill 2 to dentin. The performance of Futurabond was questionable, given its poor-quality interface and higher percentages of marginal gaps. (AU)

• Processo FAPESP: 18/09459-0 - Avaliação in vitro de agentes de condicionamento dentinário alternativos à base de cloreto férrico e ácido cítrico ou ácido nítrico
• Beneficiário: Maicon Sebold
• Linha de fomento: Bolsas no Brasil - Doutorado