Human dental plaque and whole saliva sediment were tested for their ability to bind 14C-labeled sucrose, fructose, glucose, sorbitol, and xylitol. Sucrose, glucose, sorbitol, and fructose were bound to all materials tested, in this decreasing order. The binding was strongest with plaque given a five-second ultrasonic shock, and lowest with salivary sediment. Xylitol was only insignificantly bound, indicating that plaque microorganisms possess specific recognition sites for xylitol to a very restricted extent.
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