Objective: The aim of this study was to evaluate the effect of an adhesive loaded with 0.2 % copper (Cu) and 5 % zinc oxide (ZnO) nanoparticles (Nps) on its adhesive properties and enzymatic activity at the hybrid layer ex vivo in a randomized clinical model.
Methods: Fifteen patients participated in this study, and a total of 30 third molars were used. Occlusal cavities (4 × 4 × 2 mm) were made in each tooth, and randomly divided into 2 groups: (i) Experimental group: commercial adhesive loaded with 0.2wt % CuNps and 5wt % ZnONps; and (ii) Control Group: non-loaded commercial adhesive. Teeth were restored with resin composite. Thirty days later, extractions were performed. Extracted teeth were longitudinally sectioned. Nps in powder were characterized by field emission scanning electron microscope (FE-SEM) and energy dispersive X-ray (EDX) analysis. Microtensile bond strength (μTBS), degree of conversion (DC), and nanoleakeage (NL) tests were executed. In situ zymography (Zym) was performed to evaluate the gelatinolytic activity at the hybrid layer. Student's t-test (α = 0.05) was applied for all tests.
Results: μTBS and DC did not show significant differences (p > 0.05) between both groups. However, NL and gelatinolytic activity at the hybrid layer showed significant values (p < 0.05) for experimental group in comparison with control group.
Conclusion: The addition of 0.2 % CuNps and 5 % ZnONps to a universal adhesive decreases NL and gelatinolytic activity at the hybrid layer, without jeopardizing its adhesive properties.
Significance: This randomized clinical trial with ex vivo analysis demonstrate that a commercial adhesive modified with 0.2wt % Cu and 5wt % ZnO Nps that does not affect its adhesive properties, reducing gelatinolytic activity and nanoleakage at the hybrid layer, which should contribute to an improvement of long term bonding-dentine clinical performance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jdent.2024.105283 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Realization of Merged Topological Corner States in the Continuum in Acoustic Crystals.
Phys Rev Lett
December 2024
Institute of Acoustics, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.
Merging bound states in the continuum (BICs) has significant promise for wave manipulation since it can provide an ultrahigh Q factor when compared to the isolated BICs. However, the study of merging topological bound states in the continuum (TBICs) remains largely unexplored. In this Letter, we introduce a straightforward structure for crafting the merged higher order TBICs, i.
View Article and Find Full Text PDFEchinococcus multilocularis delta/notch signalling components are expressed in post-mitotic cells.
Parasitol Res
December 2024
Institute of Hygiene and Microbiology, University of Würzburg, Josef-Schneider-Strasse 2, 97080, Würzburg, Germany.
Pluripotent somatic stem cells are the drivers of unlimited growth of Echinococcus multilocularis metacestode tissue within the organs of the intermediate host. To understand the dynamics of parasite proliferation within the host, it is therefore important to delineate basic mechanisms of Echinococcus stem cell maintenance and differentiation. We herein undertake the first step towards characterizing the role of an evolutionarily old metazoan cell-cell communication system, delta/notch signalling, in Echinococcus cell fate decisions.
View Article and Find Full Text PDFConformer-Mediated Helical Chirality in 2D Layered Hybrid Perovskites.
Angew Chem Int Ed Engl
December 2024
Indian Institute of Science Education and Research Pune, Chemistry, Dr. Homi Bhabha Road, 411008, Pune, INDIA.
Two-dimensional (2D) chiral hybrid perovskites A2PbI4 (A: chiral organic ion) enable chirality controlled optoelectronic and spin-based properties. A+ organic sublattice induces chirality into the semiconducting [PbI4]2- inorganic sublattice through non-covalent interactions at organic-inorganic interface. Often, the A+ cations in the lattice have different orientations, leading to asymmetry in the non-covalent interactions.
View Article and Find Full Text PDFConduction Band and Defect Engineering for the Prominent Visible-Light Responsive Photocatalysts.
Angew Chem Int Ed Engl
December 2024
Kyoto University: Kyoto Daigaku, Graduate School of Engineering, JAPAN.
Controlling trap depth is crucial to improve photocatalytic activity, but designing such crystal structures has been challenging. In this study, we discovered that in 2D materials like BiOCl and Bi4NbO8Cl, composed of interleaved [Bi2O2]2+ and Cl- slabs, the trap depth can be controlled by manipulating the slab stacking structure. In BiOCl, oxygen vacancies (VO) create deep electron traps, while chlorine vacancies (VCl) produce shallow traps.
View Article and Find Full Text PDFPyrazole-Mediated On-Surface Synthesis of Nickel/Nickel Oxide Hybrids for Efficient Urea-Assisted Hydrogen Production.
Nano Lett
December 2024
Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University, Shanghai 200438, China.
Creating densely functionalized supported materials without aggregation has been one of the ultimate goals for heterogeneous catalysts. Direct conversion of readily available bulk materials into highly dispersed supported materials could be highly beneficial for real applications. In this work, we invented an on-surface synthetic strategy for generating highly loaded and well-dispersed nickel nanoparticles on nickel oxide supports (Ni/NiO).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!