Abstract
Highly hydrated polyethylene oxide (PEO) films represent one type of surface modification which may interfere with biofilm formation. Protein adsorption and saliva-mediated bacterial adherence were investigated in vitro on normal and hydrophobized glass surfaces and on glass surfaces with immobilized PEO films. More protein and bacteria bound to untreated compared to hydrophobized and PEO-treated glass. Pellicle and plaque formation was also studied in vivo on ceramic crown surfaces either untreated, hydrophobized or with immobilized PEO films. Pellicle and plaque formation was similar on the untreated ceramic and PEO surfaces. Less plaque seemed to collect on these surfaces compared to adjacent normal tooth surfaces. Almost no plaque accumulated on the hydrophobic crown surface and it was virtually devoid of stainable pellicle. Even after 7 days in the mouth without oral hygiene this surface was very hydrophobic and the disclosing solution could not spread.
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