3 documents found, page 1 of 1
A Corrosão em Imagens
Simões, Alda; Sushkova, Alesia; Alves, Alexandra; Franco, Alexandra; Sá, Ana Isabel; Mata, Ana Leonor; Pereira, Ana Marisa; Vieira, Ana SoaresPREFÁCIO: No vasto panorama da ciência dos materiais, Portugal, abriga uma comunidade multidisciplinar dedicada ao estudo da corrosão e da proteção de materiais. Neste contexto, as Jornadas de Corrosão e Proteção de Materiais nascem como um evento crucial, marcado pela sua natureza técnico-científica. Estas jornadas são um fórum de divulgação e de discussão dos resultados da investigação científica e do desenvo...
Metal Release and Surface Degradation of Fixed Orthodontic Appliances during th...
Frois, António; Mendes, Alexandra Ricardo; Pereira, Sónia Alves; Louro, Cristina SantosThe purpose of the present study is twofold: (i) to assess the salivary nickel, chromium, and iron concentrations and (ii) to characterize the surface microstructure of the typical commercially available Ni-containing metallic appliances during the first 12-week orthodontic treatment period. A total of 85 unstimulated saliva samples were collected from patients before treatment, after 2 days, and after 1, 4, an...
Salivary pH Effect on Orthodontic Appliances: In Vitro Study of the SS/DLC System
Frois, António; Evaristo, Manuel; Santos, Ana Cristina; Louro, Cristina SantosStainless steels (SS) are the most-used alloys for manufacturing fixed orthodontic appliances due to their attractive set of mechanical properties, biocompatibility, and high corrosion resistance. Nevertheless, during regular orthodontic treatments–taking at least around 2 years–the intraoral environment inevitably degrades these bioalloys, releasing metallic ions into the oral cavity. In the first part of this...