Sunday, 22 May 2005

This presentation is part of: Pre-College Reseach Posters

The Effect of Grape Juice on the Adherence of Streptococcus mutans on Tooth Surfaces

Manalika Ringshia, John F. Kennedy Memorial High School, Woodbridge, NJ

Grape Juice contains an active antioxidant identified as polyphenols. These antioxidants have been known to decrease heart disease and cholesterol. One of the characteristics of polyphenols is to inhibit the glucosyltransferase of certain tooth-decay causing bacteria. In other words, it turns off an enzyme responsible for converting sugar into polysaccharoses, the binding agent of plaque-causing bacteria to teeth. One of the major decay causing bacteria is Streptococcus mutans. An experiment to analyze the effect of the polyphenols from the grape juice on the adherence of the bacteria to the teeth was conducted. Hydraxapatite pieces, structures that are composed of the same material as the outer surface of the teeth, were used, along with 100% Welch's Grape Juice. The preliminary results indicated that the polyphenols inhibited the bacteria from adhering onto the teeth. Therefore, grape juice plays an important part in inhibiting dental caries.

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