Surface mineral deposition and mechanical properties of one-step bonding agent with copper-modified niobium nanoparticles – An in vitro study

• Published in: International journal of adhesion and adhesives 2024-08, Vol.133, p.103764, Article 103764
• Main Authors: Obeid, Alyssa Teixeira, Velo, Marilia Mattar de Amoêdo Campos, de Lima Nascimento, Tatiana Rita, de Lucena, Fernanda Sandes, Guedes, Ana Paula de Melo Alves, Falcão Mendes, Ana Zélia, dos Santos, Adriana Nunes, Spironelli Ramos, Carlos Alberto, Mondelli, Rafael Francisco Lia, Soares Bombonatti, Juliana Fraga
• Format: Article
• Language: English
• Subjects: Copper; Dentin-bonding agents; Nanoparticles; Niobium
• ISSN: 0143-7496; 1879-0127
• DOI: 10.1016/j.ijadhadh.2024.103764

This study aimed to investigate the incorporation of copper-modified niobium (Nb/Cu) nanoparticles at concentrations of 0.1 % and 0.3 wt% in a one-step adhesive (PacBond Adhesive). Thirty sound human third molars were randomly divided into three groups: control, 0.1NbCu, and 0.3NbCu. Specimens were restored with PacBond and resin composite OptiComp, Composite LC. Stick specimens (0.64 mm2) were obtained and subjected to microtensile bond strength (MTBS) testing (n = 10) using a universal testing machine at a rate of 0.5 mm/min after 24 h and 6 months. Scanning electron microscope (SEM) analysis, microhardness after 24 h and immersion in ethanol (HK) (n = 7), degree of conversion (DC) (n = 6), and surface mineral deposition (n = 3) were also conducted. Data were analyzed using two-way ANOVA for MTBS and HK, and one-way ANOVA for %SHL and DC, all of them were followed by Tukey's test (p