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We aimed to create a slippery liquid-infused enamel surface with antibiofouling property to prevent dental biofilm/plaque formation. First, a micro/nanoporous enamel surface was obtained by 37% phosphoric acid etching. The surface was then functionalized by hydrophobic low-surface energy heptadecafluoro-1,1,2,2-tetra- hydrodecyltrichlorosilane. Subsequent infusion of fluorocarbon lubricants (Fluorinert FC-70) into the polyfluoroalkyl-silanized rough surface resulted in an enamel surface with slippery liquid-infused porous surface (SLIPS). The results of water contact angle measurement, diffuse-reflectance Fourier transform infrared spectroscopy, and atomic force microscope confirmed that the SLIPS was successfully constructed on the enamel surface. The antibiofouling property of the SLIPS was evaluated by the adsorption of salivary protein of mucin and  Streptococcus mutans in vitro , as well as dental biofilm formation using a rabbit model  in vivo . The results showed that the SLIPS on the enamel surface significantly inhibited mucin adhesion and  S. mutans  biofilm formation  in vitro , and inhibited dental plaque formation  in vivo .

Self-cleaning and antibiofouling enamel surface by slippery liquid-infused technique