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Background/objectives: Endocrine-disrupting chemicals (EDCs) are exogenous substances that interfere with hormone regulation, leading to adverse health outcomes. Despite the wide use of EDCs in daily products like plastics, personal care items, and food packaging, public awareness remains low. Pregnant women and new mothers are particularly vulnerable, as exposure to EDCs during early life stages can have long-term health impacts.

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Bisphenol A (BPA), extensively utilized in the manufacture of epoxy resins and polycarbonate plastics, is prevalent in the environment. Its exposure has been associated with an increased risk of hepatic lesions; however, the underlying mechanisms and the spectrum of its effects remain poorly understood. This study investigates the role of the Keap1-Nrf2 signaling pathway in regulating BPA-induced hepatotoxicity in vivo using a rat model.

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Bisphenol A (BPA) is a commonly synthetic chemical mainly used in producing plastic items. It is an endocrine-disrupting compound that causes irreversible health and environmental damage. Developing a simple method for BPA effective quantitative monitoring is emergently necessary.

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The "One Health approach" has evidenced the significant impact of xenobiotic exposure to health, and humans are a relevant target for their toxic effects. Bisphenol A (BPA) exerts a ubiquitous exposure source in all ecosystems. Given its endocrine-disrupting and harmful consequences on health, several countries have enforced new regulations to reduce exposure to BPA.

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Coating Agents for Resin Composites: Effect on Color Stability, Roughness, and Surface Micromorphology Subjected to Brushing Wear.

Oper Dent

January 2025

*Roberta Tarkany Basting, DDS, MSc, PhD, Professor, Restorative Dentistry Department, Faculdade São Leopoldo Mandic, São Paulo, Brazil.

This study evaluated the influence of six resin composite coating agents on color stability and surface roughness after toothbrushing abrasion. Discs (Ø6 mm x 2 mm) of nanofilled resin composite (Filtek Z350XT) were prepared for application of coating agents (n=10): control (absence), two surface sealants (PermaSeal and BisCover LV), two adhesive systems (Scotchbond Multi-Purpose Adhesive/3M Oral Care and Single Bond Universal), and two modeling liquids (Modeling Resin and Composite Wetting Resin). CIELab*, WID, and color change (ΔEab, ΔE00, and ΔWID) were analyzed at baseline, after finishing and polishing, after application of coating agents, after coffee staining (simulating 30 days and one year of staining), and after toothbrushing abrasion.

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