Physical, chemical and antimicrobial evaluation of a composite material containing quaternary ammonium salt for braces cementation

Bond strength of an orthodontic adhesive containing an antibiofilm agent (octafluoropentyl methacrylate)

“…A considerable amount of research has been conducted to decrease bacterial-induced WSL during orthodontic treatment. [ 5 6 7 8 18 ] The use of nanoparticles in resin composites has been taken into consideration by researchers for bonding of orthodontic brackets. [ 13 19 ]…”

“…This caused much interest in different adhesives that could overcome such problems. Different materials including chlorhexidine,[ 3 ] fluorine-containing agents,[ 4 ] Proseal,[ 5 ] amorphous calcium phosphate,[ 6 ] iodide quaternary ammonium methacryloxy silicate,[ 7 ] nanoparticles included in the adhesive (i.e., nanofillers, silver, TiO 2 , SiO 2 , hydroxyapatite, fluorapatite, fluorohydroxyapatite) and bracket surfaces coated with a thin film of nitrogen-doped TiO 2 ,[ 8 ] triazine, and niobium pentoxide phosphate[ 9 ] have been added to orthodontic adhesives to decrease decalcification around bonded brackets. Incorporation of these materials suffers from some limitations such as compromising mechanical properties and limitation of active component release,[ 3 4 ] discoloration and esthetic problems,[ 10 ] and reduction of bond strength,[ 11 ] so neither of these materials are accepted as the best.…”

Hydrophobic treatment of woven cotton fabrics with polyurethane modified aminosilicone emulsions

“…Whereas, PCU/aminosilicone emulsion-treated cotton fabrics display an additional peak at 1.740 keV corresponding to atomic silicon [64], as shown in Figs. 3 (c), (f), (i) and (j).…”

Impactos Da Covid-19 No Controle Higiênico-Sanitário No Setor Alimentício

“…Os quaternários de amônio constituem um grupo de agentes antimicrobianos com grupos funcionais ligados covalentemente a um átomo de nitrogênio e que apresentam, pelo menos, um dos grupos R constituídos por um grupo alquil cercado por uma porção aniônica (halogênio) (SUGII et al, 2017). O principal representante é o cloreto de benzalcônio, vide Figura 4, com as estruturas C12-C16 apresentando as maiores atividades antimicrobianas (PRADHAN et al, 2020).…”